Post on 03-Jun-2018
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CHAPTER SEVENTEEN
Available Tankage CapacityIn an export refinery, the estimates of the total tankage capacity
available for storage of various product groups are required for preparinginventory availability forecasts for product shipping. In single-ownershiprefineries, the entire tankage capacity is available to sustain the exportoperation. In joint-ownership refineries, the available tankage capacityfor every product group is split between the participants in the ratio oftheir equity in the refinery. Each participant then uses its share of tankagecapacity to hold its inventory for its product shipping.The procedure for estimating the total available tankage capacity andits allocation to the participants is described in this chapter.Each participant must maintain its product inventory levels within thestorage capacity allocated to it. The tankage capacity allocation is neces-sary to prepare inventory forecasts of the participants, which is discussedin later chapters.
ESTIMATION OF TOTAL AVAILABLE CAPACITYThe procedure for estimating the total available tankage capacity for aproduct group is as follows:1. All available tanks in the given product group service are listed.
Only tanks in service for the given product group are considered.The tanks in service of a given product g roup keep changing. Everytime a tank goes out of service for scheduled or unscheduledmaintenance or a new tank is added in the service of a given productgroup, the tankage list must be updated.
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2. Tanks in service in each group are listed along with the following data:Maximum gross volume (the physical volume of the tank).Maximum net volume (the total gross volume multiplied by a factorto compute the maximum net for a group).W orking ullage (the space required in tanks for operational reasons,such as correcting tank com position or disengaging vapors; a work-ing ullage is specified for a group of tanks).Minimum heel (the volume of tank below minimum gauge).Available working stock (the volume above the minimum gauge toprovide suction head to the pump transferring products from the tank).
MINIMUM AND MAX IMUM INVENTORY (LI AND HI)Each tank has some dead storage volume, which is necessary toseparate any solid entrainment and water and so forth. This inventory orholdup is not available for export but, nevertheless, is necessary foroperation of the tank. The total minimum inventory volume, which mustbe maintained for operational reasons, is termed LI. A tank LI is calcu-lated as follows:Ll = R S
whereR is the minimum heel and S is the available working stock.The tank volume between the operational maximum level and tank'sphysical volume is termed HI. This volume is used to correct the tankblend composition, if so required. A tank HI is calculated as follows:HI = P - Q
wherePis the maximum net volume of tank and Qis the working ullage.
T NK GE C P CITY V IL BLE FOR PRODUCT STOR GEThe tank volume between LI and H I is actually available for storage ofthe products. Therefore,Available capacity = HILI
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PRODUCT GROUPSRefinery product grades are combined into groups. For example, alllight naphtha grades with a specific range of density, RV P, or distillation
specifications constitute the LSR group, and the different grades ofgasolines come under the gasoline group. A typical refinery might groupproducts as follows:GROUP PRODUCTLSR LIGHT NAPHTHASWSR WHOLE RANGE NAPHTHASKEROSENE KERO SENE/JET FUELSDIESEL AUTO MO TIVE DIESELSBDSL BLACK OR MARINE DIESELSHVGO HEAVY VACUUM GAS OILSFO FUEL OILSASPHALT ASPHALT GRADES
ALLOCATION OF TANKAGE CAPACITYIn joint-ownership refineries, HI and LI are computed for every groupof tanks, and the HI and LI for the group are split in the ratio of theparticipants' equity in the refinery.
EXAMPLE 17-1In a joint-ownership refinery, participant AO C has a 60 share andparticipant BO C has 40 share. The tanks in service for each productgroup and the tank data are shown in Tables 17-1 to 17-10. Estimate thetankage capacity available to each participant.The solution isParticipant AOC equity in refinery = 40
Participant BOC equity = 60A summ ary of HI and LI is made from the tankage data. The HI and LIare split in the ratio of the participants' equity. The capacity available to
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Table17-2Light Naphtha GroupTanks
WM I N I M U MHEEL(5)R
MAX.NETW ORKINGINVENTORY
(4)H I = P-O
W ORKINGULLAGE(3 )Q
M X I M U MNET(2)P=Ox0.9766
M X I M U MGROSS(1)OANK NO.
2.0002.0002.0002.0002.000
20.00021.00022.00073.00054.5150.000
18.55513.67211.71911.71918.555
186.531182.624161.139604.515
1914121219191
187165619
356457459460476944945946TOTALNOTES:LI IS MINIMUMNET WORKIN G ULLAGE.H IISM AXIMUMNET WORKIN G INVEN TORY.CALCULATION-CALCULATETHE TOTALHI AND LI FOR EACH PRODUCT GROUP.THE CALCULATIONSOF HI AND LIPRESENTED HE RE A RE SELF-EXPLANATORYALL FIGURES AREINTHOUSAND BARRELS.ONLY TANKSINSERVICE ARE CONSIDEREDFOR COMPUTATIONOF HI AND LMAXIMUMNET IS COMPUTED FROM MAXIMUM GROSS BY MULTIPLYING WITAND THIS FACTORIS 97.66 FOR THE GROUPLSR.COLUMNS4 AND 7 SHOWHI AND LI COMPUTATIONS.
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Table17-3W h oleRange Naphtha GroupTank
M I N I M U MHEEL(5)R
MAX.NET W ORKINGINVENTORY
(4)H I =P-Q
W ORKINGULLAGE(3)
M X I M U MNET(2)P=Ox 0.9766
M X I M U MGROSS(1)OANK NO.
41.00035.00016.00092.00051.000
1057.739568.071
80.00055.000
514.668505.879117.192
1137.739623.071
527518120
1165638
965760925TOTAL1TOTAL2NOTES:LI ISMINIMUM NET WORKING ULLAGE.HIISMAXIMUM NET WORKING INVENTORY.CALCULATION:CALCULATE THE TOTAL HI ANDLIFOR EACH PRODUCT GROUP.THE CALCULATIONS OF HI ANDLIPRESENTED HERE ARE SELF-EXPLANATORY.ALLFIGURESARE IN THOUSAND BARRELS.TANK965 ALLOCATED FOR PARTICIPANT BOC USAGE ONLY.ONLYTANKSINSERVICE ARE CONSIDERED FOR COMPUTATION OF HI ANDLI.MAXIMUM NET IS COMPUTED FROM MAXIMUM GROSS BY MULTIPLYING WITHAFACTANDTHIS FACTOR IS 97.66 FOR THE GROUP WSR.COLUMNS4AND7SHOW HI ANDLICOMPUTATIONS.TOTAL 1 INCLUDES TANK 965 CAPACITY.TOTAL2 EXCLUDES TANK 965 CAPACITY.
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Table17-4Gasoline GroupTanks
M I N I M U MHEEL(5)R
M XNET W ORKINGINVENTORY(4)H I = P-Q
W ORKINGULLAGE
(3)
M X I M U MNET(2)
P=Ox 0.9570
M X I M U MGROSS(1)OANK NO.
6.0001.0001.0001.000
16.00016.0009.00017.000
16.00016.00015.00015.00015.000
144.00076.50725.000
30.62411.4846.6996.699
120.582121.539111.969115.797116.754110.055117.711115.797115.797
1101.507
321277
126127117121122115123121121
1151
129250469470710905906915916924933934935TOTAL
NOTES: LI IS MINIMUMNET WORKING ULLAGE.HIIS M A X I M U MNET WORKING INVENTORY.CALCULATION:CALCULATE THE TOTAL HI AND LI FOR EACH PRODUCT GROUP.THE CALCULATIONS OF HI AND LI PRESENTED HERE ARE SELF-EXPLANATORY.ALL FIGURES ARE IN THOUSAND BARRELS.ONLYTANKS IN SERVICE ARE CONSIDERED FOR COMPUTATION OF HI AND LI.COLUMNS 4 AND 7 SHOW HI AND LI COMPUTATIONS.
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Table17-5Kerosene GroupTanks
M I N I M U MHEEL(5)R
MAX.NET W ORKINGINVENTORY(4)
H I = P-Q
W ORKINGULLAGE(3)Q
M X I M U MNET(2)P=Ox 0.9821
M X I M U MGROSS(1)OANK NO.
10.00015.00016.00016.00021.00055.00011.00011.000
155.00004.23880.000
86.42573.65882.496
121.780131.601440.96371.69375.622
1084.238
887584
1241344497377
1104
105114115730740751901902TOTALNOTES: LIIS MINIMUMNET WORKING ULLAGE.HIIS M A X I M U MNET WORKING INVENTORY.CALCULATIONCALCULATETHE TOTAL HI ANDLIFOR EACH PRODUCT GROUP.THE CALCULATIONS OF HI AND LI PRESENTED HERE ARE SELF-EXPLANATORY.ALLHGURESARE IN THOUSAND BARRELS.ONLYTANKS IN SERVICE ARE CONSIDERED FOR COMPUTATION OF HI ANDLI.MAXIMUM NET IS COMPUTED FROM MAXIMUM GROSS BY MULTIPLYING WITHAFACANDTHIS FACTOR IS 98.21 FOR THE GROUP KERO.COLUMNS4AND7SHOW HI ANDLICOMPUTATIONS.
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Table17-6Automotive DieselGroupTanks
M I N I M UHEEL
(5 )R
M XNET W ORKING
INVENTORY(4)H I = P-Q
W ORKINGULLAGE
(3 )Q
M X I M U MNET(2 )P=Ox0.9801
M X I M U MGROSS(1)OANKN O.
3.0003.0008.0003.0003.0003.0003.0002.0003.0003.0000.2001.0000.0000.0000.000
35.200438.91140.000
122.513123.493591.980122.513121.532128.393120.55283.309123.493
123.4936.8613.9200.9804.9010.980
1678.911
12512660412512413112385126
12674151
1713
701702706711721722731732913923452455
41910917TOTALNOTES: LIIS MINIMUMNET WORKING ULLAGE.H IIS MAXIMUMNET WORKING INVENTORY.CALCULATION-C LCUL TETHE TOTAL HI ANDLIFOR EACH PRODUCT GROUP.THE CALCULATIONS OF HI ANDLI PRESENTED HERE ARE SELF-EXPLANATORY.ALL FIGURES ARE IN THOUSAND BARRELS.ONLYTANKS IN SERVICE ARE CONSIDERED FOR COMPUTATION OF HI ANDLI.MAXIMUM NET IS COMPUTED FROM MAXIMUM GROSS BY MULTIPLYING WITHAFACTOR, AND TCOLUMNS4AND7 SHOWHIANDLICOMPUTATIONS.
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Table17-7Blackor Marine Diesel Group TankM I N I M U M
HEEL(5 )R
M XNET W ORKINGINVENTORY(4)
H I = P-Q
W ORKINGULLAGE(3 )Q
MAXIMUMNET(2)P=O x0.9842
M X I M U MGROSS(1)OANKN O.
1.0001.0002.558.000
27.55827.558
2828
912TOTALNOTES:LI IS MINIMUMN ET W ORK ING ULLAGE. ISMAXIMUMN ET W ORK ING INVENTORY.CALCULATION:CALCULATE THE TOTALHI AND LIFOR EACH PRODUCT GROUP.THECALCULATIONSOFHIAND LIPRESENTED BELOWARE SELF EXPLANATORY.ALL HGURES AREIN THOUSAND BARRELS.ONLY TANKS IN SERVICE ARE CONSIDERED FOR COMPUTATION OF HIAND LI.MAXIMUMNET IS COMPUTED FROM MAXIMUM GROSSBY MULTIPLYING W ITHAFACAND THIS FACTORIS 98.42 FOR THE GROUP BDSL.COLUMNS4 AND 7 SHOWHI AND LICOMPUTATIONS.
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Table 17-8Heavy Vacuum Gas Oil (HVGO) GroupT
M I N I M U MHEEL(5)R
M XNET W ORKINGINVENTORY(4)
H I =P-Q
W ORKINGULLAGE(3)
M X I M U MNET(2)
P= Ox0.9577
M X I M U MGROSS(1)O
TANKN O.4.0008.000
12.00011.1240.00086.193544.931
631.12490569
659111705TOTALNOTES:UIS MINIMUMN ET W ORKING ULLAGE. IS MAXIMUMN ET W ORK ING INVENTORY.CALCULATION:CALCULATE THE TOTAL HI AND LI FOR EACH PRODUCT GROUP.THE CALCULATIONS OF HI AND LI PRESENTED HERE ARE SELF-EXPLANATORY.ALL FIGURES ARE INTHOUSANDBARRELS.ONLY TANKS IN SERVICE ARE CONSIDERED FOR COMPUTATION OF HI AND LI.MAXIMUM NET IS COMPUTED FROM MAXIMUM GROSS BY MULTIPLYING W ITHAFACTAND THIS FACTOR IS 95.77 FOR THE GROUP HVGO.COLUMNS4 AND7 SHOW HI AND LI COMPUTATIONS.
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Table17-9Fuel Oil GroupTanksM I N I M U M
HEEL(5)R
MAX.NET W ORKING
INVENTORY(4)H I =P-Q
W ORKINGULLAGE(3)
M X I M U MNET(2)P=Ox0.9725
M X I M U MGROSS(1 )
OTANK NO.COL NO.
3.0003.0002.0006.0003.0003.0005.0006.0002.0003.000
36.000263.37850.000
118.645119.61881.690
323.843117.673119.618202.280319.953
86.553123.508
1613.378
12212384
333121123208329
89127
1659
703713714715723724734743904914TOTALNOTES:LI IS MINIMUMNETWORKIN G ULLAGE.H IISM AXIMUMNETWORKING INVENTORY.CALCULATION-CALCULATETHE TOTAL HI ANDLIFOR EACH PRODUCT GROUP.THE CALCULATIONS OF HI ANDLIPRESENTED HERE ARE SELF-EXPLANATORY.ALL FIGURES ARE IN THOUSAND BARRELS.ONLYTANKSINSERVICE ARE CONSIDERED FOR COMPUTATION OF HI ANDLI.MAXIMUM NETISCOMPUTED FROM MAXIMUM GROSSBYMULTIPLYING WITHAFACTOR,COLUMNS4AND7SHOW HI AND LI COMPUTATIONS.
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Table17-10Asphalt GroupTanks
M I N I M UHEEL(5)
R
MAX.W ORKING(ENTORY(4)\i=p-Q
WORKINGNETULLAGE IN\
3)Q H
MAXIMUMNET2)
=0x0.9523
MAXIMUMGROSS
1) PANK NO.
0.4000.2000.2000.3000.4000.2000.3000.3002.3001.8980.000
13.3325.7145.714
12.38013.3325.714
14.28511.42881.898
1466
1314151286
180171172181183170907908TOTALNOTES:LIISM I NI M UMNET WORKING ULLAGE.H IISMAXIMUMNET WORKING INVENTORY.CALCULATION:CALCULATE THE TOTAL HI ANDLIFOR EACH PRODUCT GROUP.THE CALCULATIONS OF HI ANDLIPRESENTED HERE ARE SELF-EXPLANATORY.ALLFIGURES ARE IN THOUSAND BARRELS.ONLYTANKSINSERVICE ARE CONSIDERED FOR COMPUTATION OF HI ANDLI.MAXIMUMNET IS COMPUTED FROM MAXIMUM GROSS BY MULTIPLYING WITHAFACANDTHIS FACTOR IS 95.23 FOR THE GROUP ASPH.COLUMNS AND7SHOW HI ANDLICOMPUTATIONS.
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each participant is the difference between HI and LI for every productgroup. These calculations are shown in Table 17-11.ULLAGE
Ullage is the difference between HI and the actual inventory volume ina tank. Such data are important for scheduling the product offloading andthe size of individual shipments.TANK OW NED BY ONE PARTICIPANT
In joint-ownership refineries, a participant may build a tank exclu-sively for its own use. The capacity allocation procedure, in that case, ismodified as follows:1. Calculate the HI and LI for the group, including the exclusive tankas a part of the group.2. Calculate the HI and LI for the group , assuming the tankisexcluded.3 . The delta between the two HI and LI gives HI and LI for theexclusive tank.4. Next HI and LI corresponding to calculations w ithout the exclusivetank are used to allocate tankage capacity.5. HI and LI of the exclusive tank are added to HI and LI of theparticipant for whose use the exclusive tank was provided.
EXAMPLE 17-2Consider Tank 965 (Table 17-3), a W SR (naphtha) group tank built forthe exclusive use of participant BO C. The calculation of LI and HI for thetwo participants follows:
LI, mb HI, mbTOTAL EXCLUDING TANK 965 81 568TOTAL INCLUDING TANK 965 142 1058ESTIMATE FOR TANK 965 61 490AOC ALLOCATION = 0 . 6 x 8 1 = 568 x 0.6
= 48.6 =3 40 .8BOC ALLOCATION =81x 0.4 +61 = 568 x 0.4 + 490
= 93 .4 =7 17.2
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Table17-11AllocationofAvailableTankage Capacity Al lFigures
ALLAVAILABLECAPACITY
ALLOCATIONAOC
6=1xBOC
5=3x0.4)AOC
4=3x0.6)
REFINERYAVAILABLECAPACITY3=2-1)
TOTALH I2)
TOTALLId )PRODUCTGROUP
27485
179213126
425
1848
4173366191220492
7228383
19
7259550287329737
10341574
29
11432916478549
122917
569957
48
15555
1058904
143923
6111263
62
4123142299355210
642
30614
LPGLSRWSRGASOLINEKEROSENEDIESELBLACK DIESELHVGOFUEL OILASPHALT
CE BETWEEN ITS HI ANOTE: AVAILABLE CAPACITY FOR ANY PRODUCT GROUP IS THE DIFFEREl^RATIO OF THEIR EQUITY; IN THIS EXAMPLE, 60/40.
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CEDING OF REFINERY CAPACITYCeding is a situation in which one participant in the joint refinerychooses not to utilize its full share of refinery capacity for a prolongedperiod. In such a situation, it has the option to offer the unutilizedcapacity to the other participant. If the other participant agrees to acceptthe unutilized capacity, the receiving participant has to pay agreed-oncharges to the leasing participant to compensate it for the depreciation ofits assets and amortization of its investment in the refinery. If a partici-pant leases part of unutilized processing unit capacity, the tankage cap-acity is also ceded to the receiving participant in that proportion.Consider, for example, a refinery with crude running capacity at260 mbpcd. The capacity rights of AOC and BOC are 60/40. The crudedistillation unit capacity is split as follows:AOC capacity share, CDU = 156mbpcdBOC capacity share, CDU = 104mbpcdIf BOC w ishes to run on ly, say, 40 mbpcd for a prolonged period, BOCcan cede (104 40) = 64 mbpcd of its unutilized refining capacity. IfAOC accepts this ceded capacity, its capacity would be(156 + 64) = 220 mbpcd and B O C s refining capacity would be 40 mbpcdduring the period of ceding. The capacity of the downstream units cededunder the ceding agreement would equal (64/260) or 0.2461 times thedownstream unit capacity, as shown in Table 17-12.
CEDING OF TANKAGE CAPACITYThe procedure for ceding tankage capacity follows the principle ofceding unit capacities. In the preceding example, the ceded tankagecapacity in every product group is (64/260) of available tankage capacity.After ceding, the split of available tankage capacity is as follows:
PARTICIPANT BEFORE CEDING AFTER CEDINGAOC 0.6000 0.8461BOC 0.4000 0.1539TOTAL 1.0000 1.0000
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Table 17-12Ceded Downstream Unit Capacities in mbpcd )
UNITCRUDEDISTILLATIONFCCUHYDROCRACKERVISBREAKERCAT REFORMERDIESEL HDS
ITOTAL260.0
36.050.020.015.020.0
AOCBEFORECEDING
15621.630.012.0
9.012.0
BOCBEFORECEDING
10414.420.0
8.06.08.0
CEDED64
8.912.34 .93.74.9
AOCAFTERCEDING
22030.542.316.912.716.9
BOCAFTERCEDING
405.57.73.12.33.1
NOTES: AOC CRUDE DISTILLATION UNIT (CDU) C A PA C IT Y -6 0 AND BOC CDUCAPACITY=40 TOTAL REFINERY CDU CAPACITY WITHOUT CEDING. CEDING OFDOWNSTREAM UNITS = (CDU CE DED CA PACITY)/(TOTAL CDU CAPACITY) x (UNITTOTALCAPACITY).
The split of total HI and LI for every group tankage is done in thisratio. Tankage capacity available to participants after ceding is shown inTable 17-13.It is important to analyze the effect of tankage ceding on the oper-ability of participant BOCs part of the refinery. Depending on the sizeand frequency of lifting, m inimum u llage equal to about 17 days produc-tion is required. Referring to Table 17-14, the available storage capacity
Table 17-13Tankage Situation under Ced ing in mb)GROUPLPGLSRWSRGASOKERODSLBDSLHVGOFUELASPHTOTAL
TOTALLI
4123142299355210
642
30614
1501
A O CLI
3104120253300178
536
25912
1270
B O CLI
119224655321
647
2231
TOTALHI
15555
1058111904
143923
61 11263
626707
A O CHI
1347089565 776 5
121819
5171069
525675
B O CHI
285
163120139221
494
19410
1032
TOTALCAPACITY
11432916478549
122917
569957
485206
A O CCAPACITY
936677 5404465
104014
481810
414405
B O CCAPACITY
266
1417484
1893
88147
7801
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Table17-14Effectof Tankage Ceding on Refinery Operability
PRODUCTGROUPLPGLSRWSRGASOKERODSLBDSLHVGOFUELASPHTOTAL
BOCAVAILS,
mb1)1 7
66 5140 973 584 5
189 12 6
87 5147 2
7 4800 9
BOCPROD. RATEmb2)
05 45 83 5
613 30 2
07 91 5
43 6
AVAILABLEULLAGEdays3 = 1/2)12 324 321 014 114 213 1
18 64 9
18 4
REQUIREDULLAGE,mb 4=2x17)
091 898 659 5102
226 13 4
0134 325 5741
ULLAGESHORTFALL,mb 5 = 4 - 1 ) 1 725 3
4 2 3 1 4 0
17 537 00 8
8 7 5 1 2 9
18 1
NOTES: (1) AVAILABLE CAPACITY (HI - LI) IS FROM THIS TABLE.(2) APPROXIMATE YIELD PATTERN FROM PARTICIPANT BOC UNIT CAPACITIES AFTER CEDING.(3) NUMBER OF DAYS OF ULLAGE FROM RATED PRODUCTION.(4) VOLUME REQUIRED TO CONTAIN 17 DAYS OF RATED PRODUCTION.(5) POSITIVE HGURES INDICATE SHORTFALLS AND NEGATIVE HGURES DENOTE SURPLUS IN
ULLAGE, COL 5 = COL 4 - COL 1.
after ceding, in certain product groups is less than the m inimum required,while in some others, the available tankage capacity is more than thatrequired for operational reasons. Therefore, tankage capacity would haveto be rationalized by switching tanks from one product group to anotherin such a manner that every product group has a minimum ullage equal to17 days of its estimated production rate after ceding.
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CHAPTER EIGHTEEN
Shipping Inventory ForecastsTo plan shipment of products and to schedule such shipments, themarketing department needs to know estimates of each product group'sproduction rate and the inventory available for shipping. This information
is required several weeks in advance of the actual shipment, for productsale and chartering vessels to transport products. Also, it is important tomaintain the inventory level of each product group within the ullageavailable to the group in the refinery tankage. This is done by timelytransport of products from the refinery tanks. Failure of timely off-takecan cause a crisis situation in the refinery, forcing cutdown of crudethroughput, shutdown or feed reduction in some downstream units, ordumping distillates into fuel oil.To provide the marketing department with an accurate inventory fore-cast of all product g roups, every week, the refinery estimates the produc-tion rate of each product group and uses these to revise the inventoryforecasts for the remaining period of the month
WEEKLY PRODUCTION ESTIMATESThese estimates are done with a spreadsheet refinery model. Herevarious parameters, such as unit operating modes and blend components,can be controlled more closely than in a linear programming (LP) model,which may require a major modeling effort to reflect the actual refinerysituations. The information on the feed rates, operation modes of the
units, product blending, and tank inventory levels can be constantlyupdated, and thus these hand estimates are more realistic than the LPsolutions, which are price driven.Every week the product requirements are revised and a new estimateprepared for the remaining period of the month, incorporating the latest
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For the first estimate, the crude run and product grades to be m ade areas per the combined definitive operating plans (DOPs) of the participants.For the second estimate, the crude run is equal to the total DO P crude runminus the crude processed during the first 10 days of the month. Theproduct target for the second estimate is the combined DOPs, plus anyDOP revisions by the participants m inus the product already m ade duringthe first period. Sim ilarly, the targets for the third and fourth estimates arethe parts of products still to be made.
PROCEDURESINGLE-OWNERSHIP REFINERIES
The procedure for establishing production rates in single-ownershiprefineries is straightforward. This consists of updating the refineryspreadsheet model with the latest data on available unit capacities, cruderun rate, product blending, and the like. The model is run to establishrefinery input and output balance. Refinery production rate estimate isused as a basis for inventory forecasts of various product groups.
JOINT-OWNERSHIP REFINERIESThe procedure for establishing production rates in joint-ownership
refineries is more complex and described in detail. Here, not only therefinery production rate is established but also the production rate forevery product group is split between the participants to establish separateinventory forecasts for the two participants. Here again, the refineryspreadsheet model is used to estimate the refinery production rate.Participants' submitted DOPs form the basis for splitting refineryproduction in a given period. This rough allocation is used to prepareestimates of inventory available to each participant for shipping its
product.At the start of every month, the refinery receives DOPs from both theparticipants, which list information about the crude throughput and theproduct slate of each participant. Based on this information, the refinerymakes its own estimates of production of various products during themonth.
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ALLOCATION OF DELTASThe delta between the combined DOPs of the participants and therefinery estimates, as per spreadsheet program, for each product group
is examined to determine the cause of that delta and delta assigned to theparticipant that caused the delta. If no particular reason can be identified,the delta is allocated to the participants in the ratio of their crude run.Production of a participant is the sum of its DOP plus the allocated deltaas follows:Participant production = participant DOP + deltaThe production rate is worked out by dividing the participant's produc-tion by the num ber of days for w hich the estimates are m ade. In this way,the production and thus production rate estimate of the refinery during theweek is split between each partic ipan t's production rate for every productgroup.For the allocation of deltas for various product grades, the concept of
pseudoequivalencies is used, based on how the product is blended in therefinery. Pseudoequivalency is in terms of other product grades andprocess stocks. Important differences from the equivalencies used forproduct allocation are as follows: Pseudoequivalency is used here for the sole purpose of estimatingthe production rate in terms of balancing grades and process stocks
instead of only in terms of balancing grades for equivalencies used inproduct allocation. As the sole purpose of these equivalencies is to investiga te the effecton product grades inventories any effect on process stocks isignored.The following examples should clarify the use of these pseudoequiva-
lencies.WSR NAPHTHA)
The production of WSR in an estimate was85mb m ore than that listedin the combined DOPs. As no cause could be found for this additional
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production, this is allocated to the participants in the ratio of each one'scrude run as follows:DOP, ESTIMATES, DELTA, CRUDE
PARTICIPANT mb mb mb RATIOAOC 839 71 0.8354BO C 96 14 0.1646TOTA L 935 1020 85 1.0000
GASOLINE GROUP DELTASAfter an estimate, the total gasoline group delta between estimates andthe DOPs was estimated as follows:
GRADE DELTA, mb1-387 251-390 241-395 0I-397L -105I-397LL 30T O T A L G R O U P - 1 6
The cause of delta for certain grades could be identified, while forother grades, it could not be ascertained. In this case, delta is firstallocated for grades for which the cause is known; the remaining deltais allocated to the participants in the ratio of their crude run.Gasoline Grade 397L
The delta between I-397L production and the combined DOPs is 105mb. This delta is split between the participants in the ratio of theircrude run:
PARTICIPANT CRUDE RATIO DELTA, mbAOC 0.8354 - 8 8BOC 0.1646 - 1 7TOTAL 1.0000 - 1 0 5
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The I-397L blend contains 25 reformate (RON 95). Therefore, a -8 8production change releases 22 mb reformate for AO C. Hence, A O C sgasoline allotment decreases by 22 mb while the reformate pool increasesby the same amount. Similarly, B O C s gasoline pool decreases by 4 mband the reformate pool increases by the same amount, as follows:
STOCK AO C, mb BOC , mbI-397L - 2 2 - 4REFORM ATE (RON 95) 22 4TOTAL O O
Gasoline Grade I-397LLThis grade is blended with 47 reformate and is made only for BO C.Extra production of 30 mb contains approximately 14mb reformate,increasing the gasoline pool by that amount:
STOCK AO C, mb BOC, mbI-397LL O 14REFORMATE (95RON) O - 1 4TOTAL O O
The remaining delta = 16 (224 + 1 4 ) or 4mb, which isallocated to the participants in their crude run ratio:A OC = - 3 m bBOC = lmb
AOC total delta = ( - 2 2 - 3) = - 2 5 mbBOC total delta = ( - 4 + 14 - 1) = 9mb
F U E L OILEstimates show that production of 1-961 (80cst) for AOC was32 mb m ore than the D OP estim ates. The effect of this delta on fuel
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and diesel pools was determined as follows. The refinery blends thislow viscosity fuel oil by cutting normal 1-961 grade with 1-888 dieselas follows:
VISCOSITYGRADE PRODUCT VOLUM E, mb BLEND INDEX1-961 FU E L O IL 27.8 4601-888 DIESEL 4.2 - 3 01-961 (80 cst) F U E L O IL 32.0 398
Production of an additional 32 mb 1-961 (80 cst) for AOC increases itsfuel oil by (32 - 27.8) or 4.2 mb and decreases d iesel by 4.2 mb as shownnext:
GRADE GROUP PROD UCTION, mb1-961 (80 cst) F U E L O IL 32.01-961 FUEL OIL -2 7 .81-888 DIESEL - 4 . 2TOTAL 0
DIESEL GRADESIn an estimate, the AOC production of diesel grade 1-876 wasincreased by 79 mb to cover its lifting. Estim ate its effect on AOCinventory.The 1-876 was blended in the refinery with 1-888 diesel and 1-440 tomatch the pour point of 1-876 (21F) as follows. Here, the 1-876 delta is79 mb.
GRADE PRODUCT VOLU ME, mb POUR INDEX1-888 DIE SEL 72.3 3651-440 KE RO SEN E 6.7 461-876 DIE SEL 79.0 338
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The effect on thedieselandkerosene poolis as follows:GRADE GROUP PRODUCTION,mb1-876 DIESEL 79.01-888 DIESEL -72.31-440 KEROSENE -6.7TOTAL 0
Here,AOC diesel pool- 79.0 - 72.3)
= 6.7 mbAOC kerosene pool= 6 7mb
ASPHALTInanestimate, productionofasphaltwas 10,000 barrels lessfor BOC
due to lack of ullage. To estimate the effect of this change on otherbalancing-grade productsthefollowing theprocedurewasemployed.The delta of - 1 0 , 0 0 0 b b l on asphalt production for BOC could beconsideredablendoffueloil anddiesel,as per the asphalt equivalency,shown next:GRADE GROUP VOLUME,mb VISCOSITY BLEND INDEX1-961 F U E L O I L -17.6 4601-888 DIESEL 7.6 -301-1138 ASPHALT -10.0 832
Asaresultof this change,BOCgets +17.6 mb fueloil and7 6mbdiesel,as follows:GRADE GROUP DELTA,mb1-961 FUELOIL 17.61-888 DIESEL -7.61-1138 ASPHALT -10.0TOTAL 0
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Examples of joint-ownership refinery weekly estimates, allocation ofdeltas, and determination of production rates during a month are shownin Tables 18-1 to 18-16. Table 18-1 shows the first refinery estimateand a comparison with combined participant DOPs and calculation ofdeltas. Table 18-2 show deltas by product groups. Table 18-3 showsthe allocation of these deltas by participant, and Table 18-4 showscalculation of the production rate for all product groups based on thefirst estimate. Similar calculations are done for the second, third, andfourth estimates. Thus, production rates of various product groups areworked out for both the participants. In fact, the actual refinery pro-duction rate of various product groups has been split into the twoparticipant's production rates. Whenever a new estimate is done, thenew production rates replace the earlier ones in the refinery's inventoryestimating program. Weekly estimates also ensure that crude run andproduct produced during the month is according to the refinery's DOPfor that month.
INVENTORY AND ULLAGE FORCASTING SYSTEM JOINT OWNERSHIP REFINERIES)The inventory and ullage forcasting system (IUFS) is designed to provideinformation to the participants on their inventory and ullage situation up to90 days ahead, to enable them to plan their product lifting schedule. Data oneach product group are presented in a separate report. This is an on-linesystem in which participants can constantly update their shipping data, suchas placing a new shipment, canceling an already-placed shipment, updatingthe estimated arrival time of expected shipments. The rest of the data areupdated only by the refinery (see Tables 18-17 to 18-23).The system presents estimates on the following, from present day tothat 30-90 days ahead: The physical inventory of each saleable product group of the par-ticipants. The available inventory of each product group for shipment. The ullage available to each participant, for each product group , tofurther build their inventories for shipments. The estimated refinery production rate for every product group of theparticipants.
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Table 18-1Determination of Deltas between Refinary Estimates
and Participants DOPs, First Estimate (mb)
GRADE1-1501-2011-2101-2201-3871-3901-395I-397LLI-397LI-397R1-3981-4001-4111-4191-4401-876I-876zp1-8881-8921-9611-96 IS1-1138
PROCESSSTOCKSREF 9ORREF 95RL.C.NM C NPOLYHSRK E R O B SDIESELBSDES DSLLVGOL.ISOMATEHVGOM. ISOMATEH. ISOMATEFCC CUTTERATM. RESID
PRODUCTSPROCESS STOCKTOTAL
AOCDOP
200839006612002665436200813737151060165601766045
00000000- 1 7 138- 7 533- 2 50750
6154- 1 2 56029
BOCDOP
009616500156011150000171003470260045
18900- 3000- 1 551- 1 54100150
11851011286
COMBINEDDOP
200935165066135602776936200813754251060200302026090
18900- 3000- 1 8 689- 9 074- 2 50900
7339- 2 47315
REFINERYESTIMATE
200102016525901359017269462008238561510601983018763290
- 3 5- 2 6153- 441- 5- 3 0- 2 4 363- 1 1 1259- 4 17104
7390- 3 97351
DELTA
008502524030- 1 0 5010001011900- 2 00- 1 5 0320
- 5 3- 3 5153_ 1
41- 5- 3 0- 5 7- 2 6- 2 1185- 1 671- 9 0451- 1 536
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Table 18-2Delta by Product Group, First Estimate (mb)PRODUCTG R O U P S
LPGLSRWSRGASOKERODSLBDSLFUEL OILASPHALTTOTAL
TOTALDELTA
OO
85- 1 6120
- 2 00
- 1 1 80
51
AOC DELTAALLOCATION00
71- 2 5100
170
- 9 80
31
BOC DELTAALLOCATION00
149
20- 3
0- 2 0
020
The shipment schedule of participants: ship ID, dwt, parcel to beloaded (product grade and the quantity in tons or barrels), and theestimated time of arrival (ETA). The ETA is constantly updated bythe participants.
This information is updated every time that A new refinery production estimate is done , typically, once a week.The refinery's new production rates, of all product groups based onthe new estimate, are entered in the IUFS. The actual closing inventories of the participants from the previousmonth's allocation are available. The tankage capacity allocation of a participant is revised (due toreleasing a storage tank for maintenance or adding a tank, which isput back in service after maintenance). There is a change in the ETA of a ship for the participant.
REFERENCE POINTThe reference point for any product group inventory is the closinginventories of the participants from the final allocation of the previousmonth.To these figures are added, the actual past production of each productgroup of the participant. The basis of future production rates of a
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Table 18-3Estimation of Production Change Allocation for Inventory For
BOCOCAOC
DELTABALANCE
DELTAI-397LL
30I-397L-17
1-961(80)32
I-397L-88
TOTALDELTA
PRODUCTGROUP
00
713100
13102
053
00
85
12016
122
63
14
14
4
4
44
0
22
22
00
851612020
1180
5 1
LPGLSRWSRGASOLINEKEROSENEDIESELFUEL OILASPHALTTOTALNOTES:CRUDERATIO:AOC 0 8354BOC 0 1646
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Table 18-6Delta by Product Group, Second Estimate (mb)PRODUCTGR OU PS
LPGLSRW SRGASOKERODSLBDSLFUEL OILASPHALTTOTAL
TOTALDELTA
OO
- 8 0- 1 3
61- 2 8
0- 7 1
1- 1 3 0
AOC DELTAALLOCATION
00
59- 1 1
51- 2 5
0- 6 3
1- 1 0 6
BOC DELTAALLOCATION
00- 2 1- 210_ 30- 80- 2 4
1. The starting or reference point for the IUFS would be the closinginventories for all products as of April 30 (as per the final allocationreport for the month of April of that year). The inventories ofindividual product grades are lumped together into product groups.2. For the past period, M ay 1 to June 9, the actual refinery productionrates for all product groups are available, and these are split intoparticipant p roduction rates on the basis of the weekly allocation ofproduction for the IUFS for that period.
3. For the current date, June 10, to the end of current month, June 30,the production rates as established by latest weekly refinery esti-mates are used.4. For the next 2 months, July and August, the participants' D O P's forJuly and August (advance DO Ps) are used. The advance DO Ps of theparticipants may not be very accurate but, nevertheless, containuseful data on the planned crude run, refinery units onstream factors,and projected product lifting schedule, if known beforehand.
Thus,participants have a useful tool to determine the inventory avail-ability during the next 3 months and can schedule their vessels forproduct lifting accordingly.The IUFS helps sense potential problems associated with the schedul-ing of ships and product loading, such as bunching ships, with theassociated problems of berth availability, and delays or constraints onproduct loading system.
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Table18-7Production Change Allocation For Inventory Forecasts,
BOCOCCONDENSATE-9LSRADJUSTI-397L-41-97176
I-928-651-961 80)32I-397L-18TOTALDELTAPRODUCTGROUP
9
9
99
0
1
1
77
0
1216
28
22
0
5
5
00
8013
612871
130
LPGLSRWSRGASOLINEKEROSENEDIESELFUELOILASPHALTTOTALNOTES:CRUDERATIO:AOC 0 835BOC 0 165
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Table18-8Estimationof Production Rates for InventorLOCALSALES
4)PRODUCTION
INVENTORY3)
ALLOCATEDDELTA
2)DOP
1)PRODUCTGROUPS
1000
91113360006
256
0000
6800000
68
10134520356522
139500
102758
4022
2279370
103277
00
20711790
00
-59-11
51-25
00
-63
-106
00
-21-210-3
00
-80
-24
10134579367471
142000
109057
4128
227
1147293
28000
21511814
AOCLPGLSRWSRGASOLINEKERODSLBDSLHVGOFUELASPHALTTOTAL
BOCLPGLSRWSRGASOLINEKERODSLBDSLHVGOFUELASPHALTTOTAL
ESTIMATEPERIOD =7DAYS
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Table 18-10Delta by Product Groups, Third Estimate (mb)PRODUCTG R O U P S
LPGLSRWSRGASOKERODSLBDSLFUEL OILASPHALTTOTAL
TOTALDELTA
OO
- 8 21110
- 3 20
- 2 4- 2 3
- 1 4 0
AOC DELTAALLOCATION
00
- 5 9- 1 1
51- 2 5
0- 6 3
1- 1 0 6
BOC DELTAALLOCATION00
- 2 322
- 4 1- 7
039
- 2 4- 3 4
For example, referring to the IUFS system for whole straight runnaphtha (WSR; Table 18-18), Column 1 refers to the calendar date. Column 2 refers to the physical inventory of WSR for participant AOC . Column 3 refers to the physical inventory of WSR for participant BOC . Column 4 is the total refinery inventory on the referred day, the sumof columns 2 and 3. Column 5 is available inventory of participant AOC, obtained by sub-tracting from AOCs physical inventory its allocated LI (Chapter 17). Column 6 is similarly the available inventory of participant BOC,
obtained by subtracting from B O C s physical inventory its allocated LI. Column7is the total available inven tory, the sum of colum ns5and 6. Column 8 is the ullage available to participant AO C for storing itsproduct, the difference between the total storage capacity for WSRavailable to AOC (Chapter 17) and its present inventory. Column 9 is the ullage available to participant BO C for storing itsproduct, the difference between the total storage capacity for WSRavailable to BOC (Chapter 17) and its present inventory. Column 10 is the total available ullage in the W SR g roup of tanks atthe present inventory level. Thus,
Inventory + ullage = (HI LI) for the refineryas well as for participants
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Table18-11Production Change Allocation for Inventory Forecasts,
BOCOCCONDE
-6LSR
ADJUSTASPHALT
-13I-39721
I-397C-25
ASPHALT-10
^97124
I-928-4
1-961(80)3
I-397L-5
TOTALDELTAROUP
66
0
1023
130
10
10
18
18
818
100
32
1
11
2
1
0
1
1
00
821110
322423
140
LPGLSRWSRGASOLINEKEROSENEDIESELFUEL OILASPHALTTOTALNOTES:CRUDE RATIO:AOC 0.835BOC 0.165
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Table18-12Estimationof ProductionRates for Inventory Forecast,LOCALSALES
4)ALLOCATIONINVENTORY
3)ALLOCATED
DELTA2)
DOP 1)
PRODUCTG R O U P
800
59119230004
213
0000
6800000
68
533
382238363871
00
71334
2639
16
693972
16300
161-4
507
00
-6316
-2000
-37-10
-106
00
-19-5
2-12
00
13-13-34
533
445222355891
00
75044
2745
16
884470
17500
1489
541
AOCLPGLSRWSRGASOLINEKERODSLBDSLHVGOFUELASPHALTTOTAL
BOCLPGLSRWSRGASOLINEKERODSLBDSLHVGOFUELASPHALTTOTAL
ESTIMATE PERIOD =7DAYS.
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Table 18-13Determination of Deltas between Refinery Estimatesand Participants DO P, Fourth Estimate (mb)TARGET REFINERY
DOP ESTIMATE DELTAGRADE1 150 3 3 01 201 0 0 01 210 257 262 51 220 12 33 211 383 0 0 01 387 5 5 01 390 29 29 01 395 5 0 5I 397LL 7 7 0I 397L 112 81 31I 397R 47 47 0I 397C 0 0 01 398 11 9 201 400 3 3 01 411 2 2 01 419 280 280 01 440 94 150 561 800 0 0 01 876 55 55 0I 876zp 0 0 0I 885SP 72 72 01 888 5 6 337 3931 888 52DI 348 0 3481 892 1 0 11 928 0 0 01 961 408 390 1 8I 961S 0 0 01 971 6 6 01 1138 15 12 3
PROCESSSTOCKS
REF 9OR -1 3 -1 2 1R E F 95 R - 1 6 - 1 4 2L CN - 1 8 - 1 8 0M C N - 9 - 9 0P OL Y - 8 - 8 0HSR 30 30 0KER OBS 40 40 0D I E S E LB S - 1 6 - 1 6 0DES DSL 3 3 0LVGO 39 39 0L. ISOMA TE 11 11 0H V GO - 8 7 - 2 0 6 7M. ISOMATE 56 17 - 3 9H. ISOMATE 134 57 - 7 7F C C C U T T E R - 1 0 2 - 3 3 6 9ATM. RESID - 3 1 - 3 1 0PRODUCTS 1456 1401 - 5 5PROCE SS STOCKS 13 36 23TOTAL 1469 1437 - 3 2
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Table 18-14Delta by Product Groups, Fourth Estimate (mb)PRODUCTG R O U P SLPGLSRWSRGASOKERODSLBDSLFUEL OILASPHALTTOTAL
TOTALDELTAO
- 2 153
- 6 758
- 1- 1 8
- 2- 4 3
AOC DELTAALLOCATIONOO- 2 34- 5 648- 1- 1 4
_ 2- 4 4
BOC DELTAALLOCATIONO
- 2 128
- 1- 1 1
10O
4O1
that is, column 5 + column 8 = HILI, or allocated tankagecapacity, for participant AOC (Chapter 17); andcolumn 6 + column 9 = HILI, or allocated tankage capacity,for participant BOC. Columns 11 and 12 show the volume of projected lifting ofproducts by the participants in thousand barrels on the date shown.Column 13 shows the ship ID, or identification number. Column14 lists the product grade to be lifted by the ship. Column 15shows the name of the ship and the likely date when the productis to be lifted. The data in columns 11 to 15 is constantly updatedby the refinery, on receipt of information on ship ETA from theparticipants.
Columns 16 and 17 indicate the current production rate of partici-pants AOC and BO C. The production rate and product shipments arereflected as follows. The actual inventories of the participants (col-umns 1 and 2) increase at the rate of their production rates. Forexample, referring to the IUFS for WSR naphtha date June 19, thephysical inventory of participant AOC is 796mb. On June 20, theinventory increases to (796 + 30) or 827 mb, the production ratebeing 30.3 mb per day. The inventory on June 21 is (827 + 30.3450) or 407mb. Here, 450mb is the WSR product loaded on shipNordflex (column 11).
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Table18-15ProductionChange Allocation for Inventory Forecast
BOCOC
CONDENSAT-7
LSRADJUST
REFORMERFEED-42
ASPHALT-2
REFORMERFEED-127
I-397L-26
TOTALDELTAROUP
71414
0
2418
42
2
4
0
25102
127
7
7
021
53
675 81
18
43
LPGLSRWSRGASOLINEKEROSENEDIESELMARINEDSLFUEL OILASPHALTTOTAL
CRUDERATIO:AOC0.8354BOC 0.1646
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Table18-16Estimationof Production Rates for Inventory Forecast,LOCASALE
4)ALLOCATIONINVENTORY
3)ALLOCATED
DELTA2)
DOP1)
PRODUCTG R O U P
400
2755110002
99
00000000000
-3-10192149104399-1
033211
1173
0-23
7028207900
642
240
00
-234
-5648-1
0-14-2
-44
0-21
28-1
-111000
-401
-3-10215145160351
00
346131217
0-24229316900
682
239
AOCLPGLSRWSRGASOLINEKERODSLBDSLHVGOFUELASPHALTTOTAL
BOCLPGLSRWSRGASOLINEKERODSLBDSLHVGOFUELASPHALTTOTAL
ESTIMATEPERIOD = 6 DAYS.
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Table 18-17Lifting for Product Group LSR, Light Straight-Ru
SSHIPMENT
M. BARRI ESLLAGEAVAILABLEINVENTORY
ACTUALINVENTORY
BOC 12 )
AOC 11)
BOC TOTAL9) 10)
AOC8)
TOTAL7)
BO C6)
AOC5)
TOTAL4)
BO C3)
AOC2)
DATE 1)
46
1831781721671611561501451391341281231171121061019590847973686257
297292286275270264
8075696458534742363125201493
-2-8
-13-19-24-30-35-41-46
194H189H183H178H172H167H
103103103103103103103103103103103103103103103103103103103103103103103103103103103103103103
122127133138144149155160166171177182188193199204210215221226232237243248
81319243035
4247535864697580869197102
108113119124130135141146152157163168
-72-67-61-56-50-45
808080808080808080808080808080808080808080808080808080808080
208213219224230235241246252257263268274279285290296301307312318323329334
9499
105110121445
7681879298
103109114120125131136142147153158164169175180186191197202
-38-33-27-22-11313
132132132132132132132132132132132132132132132132132132132132132132132132132132132132132132
1-Jun2-Jun3-Jun4-Jun5-Jun6-Jun7-Jun8-Jun9-Jun
10-Jun11-Jun12-Jun13-Jun14-Jun15-Jun16-Jun17-Jun18-Jun19-Jun20-Jun21-Jun22-Jun23-Jun24-Jun25-Jun26-Jun27-Jun28-Jun29-Jun30-Jun
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Table 18-18Lifting for Product Group WSR, Whole Straight-RSHIPMENTLLAGE
AVAILABLEINVENTORY
BO C12 )
AOC 11 )
TOTAL10 )
BOC9)
AOC8)
TOTAL7)
BO C6)
AOC5)
TOTALINVENTORY
4)
ACTUALINVENTORY
BO C3)
AOC2)
DATE1)
36
225
450
713680646611578544734701667632598565531496463429394361327292708675641606809775740707673638
607604600596593589585582578574570567563559556552548545541537533530526522609605601598594590
106764615
-15-45149119
895828
-32-63-93
-123-154-184-214-245
175145115
84200170139109
7948
546579613648681715525558592627661694728763796830865898932967551584618653450484519552586621
173176180184187191195198202206210213217221224228232235239243247250254258171175179182186190
373403433464494524330360390421451481511542572602633663693724304334364395279309340370400431
772805839874907941751784818853887920954989
102210561091112411581193810844879676710745778812847
296299303307310314318321325329333336340344347351355358362366370373377381294298302305309313
476506536567597627433463493524554584614645675705736766796827407437467498382412443473503534
1-Jun2-Jun3-Jun4-Jun5-Jun6-Jun7-Jun8-Jun9-Jun
10-Jun11-Jun12-Jim13-Jun14-Jun15-Jun16-Jun17-Jun18-Jun19-Jun20-Jun21-Jun22-Jun23-Jun24-Jun25-Jun26-Jun27-Jun28-Jun29-Jun30-Jun
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Table 18-19Lifting for Product Group Gasoline m
SSHIPMENTLLAGE
AVAILABLEINVENTORY
BOC12)
AOC 11)
TOTAL 10 )
BOC9)
AOC8)
TOTAL7)
BOC6)
AOC5)
TOTALINVENTORY
4)
ACTUALINVENTORY
BOC3)
AOC2)
DATED
A
A
AC
A
AAA
35
19
26
35
18
4439
120
217201184168251235219263247231214198181200183202186169171155138122105133155521505488472456
-17-20-24-28-17-20-24
740-4
-11-15-19
13952
-6-9
-13-17-21133129125122118
234221208196268255243256243231218205192215202189177164169157144131118150176388376363350338
258274291307224240256212228244261294275292273289306304320337353370342320-46-30-13
319
207210214218207210214183186190194197201205209177181185188192196199203207211
5761656872
51647789173042294254678093708396
108121116128141154167135109
-103-91-78-65-53
557573590606523539555511527543560576593574591572588605603619636652669641619253269286302318
327330334338327330334303306310314317321325329297301305308312316319323327331177181185188192
230243256268196209221208221233246259272249262275287300295307320333346314288
7688
101114126
1-Jun2-Jun3-Jun4-Jun5-Jun6-Jun7-Jun8-Jun9-Jun
10-Jun11-Jun12-Jun13-Jun14-Jun15-Jun16-Jun17-Jun18-Jun19-Jun20-Jun21-Jun22-Jun23-Jun24-Jun25-Jun26-Jun27-Jun28-Jun29-Jun30-Jun
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Table 18-20Lifting for Product GroupKerosene m
SHIPID
13 )
SHIPMENTLLAGEAVAILABLEINVENTORY
ACTUALINVENTORY
BOC 12 )
AOC 11)
TOTAL 10 )
BOC9)
AOC8)
TOTAL7)
BOC6)
AOC5)
TOTAL4)
BOC3)
AOC2)
DATE 1)
A9210A9211A9212C90535A9183C90428
A9150A9160
A9184
C90634
238
80
2922
44
86199
64
266241216193
221197172429406381357332307370544520495470511486462437412389364340395370347322
120117114112
110107104202200197194191188186183180177174172169166163160158155152229226224221
146124102
81
1119068
227206184163141119184361340318296339317296274252231209188166144123101
453478503526
498522547290313338362387412349175199224249208233257440307330355379324349372397
167170173175
177180183858790939699
10110410711011311511812128212712913213558616366
286308330351
321342364205226248269291313248
7192
11413693
115136158180201223244266288309331
867892917940
912936961704727752776801826763589613638663622647671696721744769793738763786811
333336339341
343346349251253256259262265267270273276279281284287290293295298301224227229232
534556578599
569590612453474496517539561496319340362384341363384406428449471492514536557579
1-Jun2-Jun3-Jun4-Jun
5-Jun6-Jun7-Jun8-Jun9-Jun10-Jun
11-Jun12-Jun13-Jun14-Jun15-Jun16-Jun17-Jun18-Jun19-Jun20-Jun21-Jun22-Jun23-Jun24-Jun25-Jun26-Jun27-Jun28-Jun29-Jun30-Jun
8/12/2019 Available Tankage Capacity
48/61
Table 18-21Lifting for Product Group Diesel mSHIPID
13)
SHIPMENTLLAGEAVAILABLEINVENTORY
ACTUALINVENTORY
BOC 12)AOC 11)
TOTAL 10)
BOC9)
AOC8)
TOTAL7)
BOC6)
AOC5)
TOTAL4)
BOC3)
AOC2)
DATE 1)
AC287AJ213C20425C2042GB226AJ213A29179A2921A2921A2921GB2269C29053AJ213
GB227GB226A29177A2918C2053AC2873A29197
145
45P
13
37
1
45S
129
1412O
O118441
3203
438
401320462
439356282461381
350
339328451
453442431456445
88
62-811
-14-86
-1495-64
609
646727585
608691765586666
68
7990-33
-35-24-13-38-27
541
567637618
643715778624693
873
910991849
872955
1029850930
174
18519673
7182936879
699
725795776
801873936782851
1-Jun
2-Jun3-Jun4-Jun
5-Jun6-Jun7-Jun8-Jun9-Jun
8/12/2019 Available Tankage Capacity
49/61
Table18-21ContinuedSHIP
ID13)
S H I P M E N TL L A G EA V A I L A B L EIN V E N T O R Y
ACTUALIN V E N T O R Y
BOC12)
AOC 11)
TOTAL10)
BOC
AOC8)
TOTAL7)
BOC6)
AOC5)
TOTAL4)
IO C3)
AOC B2)
DATE1)
C20433AC2882A29149A29150A29214
A29117AC2874AC2883A29172C20536C20427
AC2875A29115C20427C20537C20427C20634A29147C20635
45
4545P
14845
95P80
45
42556637
22235
45S
185
95S
222
545466382555582536452369286795714255
936852770686606
900817734873834
478467455444477466454443431420408
397385374362351
437426414403436
67-1
-7311110570
-74-145
375306
539467396324255
463391320470398
502581665492465511595678761252333
111195277361441
147230313174213
-60-49-37-26-59-48-36-25-13-2
10
2133445667
-19-8
415
-18
566630702518524559631703774254323
90162233305374
166238309159231
766845929756729775859942
1025516597
375459541625705
411494577438477
465769804758708193104
116
Y l139150L62173
8798
L l O12188
720788860676682717789861932412 :481 :
248 :320 :391 :463 :532 :
324396467 :317 :389
10-Jun11-Jun12-Jun13-Jun14-Jun15-Jun16-Jun17-Jun18-Jun19-Jun20-Jun
21-Jun22-Jun23-Jun24-Jun25-Jun
26-Jun27-Jun28-Jun29-Jun30-Jun
8/12/2019 Available Tankage Capacity
50/61
me l O i-22> upFt
able18uct Gre
TiProdiforiftin
SHIPID
13)
SHIPMENTLLAGEAVAILABLEINVENTORY
ACTUALINVENTORY
BOC12)
AOC 11)
TOTAL10)
BOC9)
AOC8)
TOTAL7)
BOC6)
AOC5)
TOTAL4)
JO C3)
AOC E2)
DATE1)
GA26
A921A914
A915
A915
A905A908
6
130518
32
130
65518
1200113610731009951888824
122011561618155514911428139613321269120512721208114410811017954890826763910847
13011237
577569561553545537529596588580572564556548540532524516508500492484476468460452590582574566
623567512456406351295624568
1038983927872848792737681756700644589533478422366311320265727671
272336399463521584648252316
-146-83-194476
140203267200264328391455518582646709562625171235
12202836445260
1917
25334149576573818997105
113121129137-1
71523
260316371427477532588259315
-155-100-44113591
146202127183239294350405461517572563618156212
602666729793851914978582646184247311374406470533597530594658721785848912976
1039892955501565
144152160168176184192125133141149157165173181189197205213221229237245253261269131139147155
4585145696256757307864575134398
154209233289344400325381437492548603659715770761816354410
1-Jun2-Jun3-Jun4-Jun5-Jun6-Jun7-Jun8-Jun9-Jun
10-Jun11-Jun12-Jim13-Jun14-Jun15-Jun16-Jun17-Jun18-Jun19-Jun20-Jun21-Jun22-Jun23-Jun24-Jun25-Jun26-Jun27-Jun28-Jun29-Jun30-Jun
8/12/2019 Available Tankage Capacity
51/61
Table 18-23Lifting for Product Group Asphalt
S
SHIPMENTLLAGEAVAILABLEINVENTORY
ACTUALINVENTORY
BOC 12 )
AOC 11)
TOTAL 10 )
BOC9)
AOC8)
TOTAL7)
BOC6)
AOC5)
TOTAL4)
BOC3)
AOC2)
DATE 1)
BAB3B3BS
BA
BAB3
BSB3BA
5
5
7
7
6
5
76
6
6
-11-8
-12-7-4-1-4-7
-10-5-8
-10-14-16-19-21-10-13-10-12-15-12-16-18-21-23-20-17-20-17
-3-1-2-4
0-2-3-5-1-4-5-7-843
10-220-1-3-40
-31
-9
-11-5
0-1-24-5-6-7-8
-10-11-12-13-14-16-11-12-13-14-16-17-18-19-20-16-17-18
454246413835384144394244485053554447444649465052555754515451
16121415171315161812141517182021
910121315111314161713141612
293032262122232526272829313233343537323334353738394041373839
595660555249525558535658626467695861586063606466697168656865
221820212319212224182021232426271516181921171920222319202218
373840342930313334353637394041424345404142434546474849454647
1-Jun2-Jun3-Jun4-Jun5-Jun6-Jun7-Jun8-Jun9-Jun
10-Jun11-Jun12-Jun13-Jun14-Jun15-Jun16-Jun17-Jun18-Jun19-Jun20-Jun21-Jun22-Jun23-Jun24-Jun25-Jun26-Jun27-Jun28-Jun29-Jun30-Jun
8/12/2019 Available Tankage Capacity
52/61
8/12/2019 Available Tankage Capacity
53/61
Table 18-24Lifting for Product Group LSR, Light Straight-RuSHIP
ID6)
SHIPMENT5)
ULLAGE4)
AVAILABLEINVENTORY
3)PHYSICAL
INVENTORY2)
DATE 1)
6042646
1831781721671611561501451391341281231171121061019590847973686257
297292286275270264
122127133138144149155160166171177182188193199204210215221226232237243248
81319243035
208213219224230235241246252257263268274279285290296301307312318323329334
9499
105110121445
1-Jun2-Jun3-Jun4-Jun5-Jun6-Jun7-Jun8-Jun9-Jun
10-Jun11-Jun12-Jun13-Jun14-Jun15-Jun16-Jun17-Jun18-Jun19-Jun20-Jun21-Jun22-Jun23-Jun24-Jun25-Jun26-Jun27-Jun28-Jun29-Jun30-Jun
8/12/2019 Available Tankage Capacity
54/61
Table 18-25Lifting for Product Group WER, Whole Straight-RuSHIPID
6)SHIPMENT
5)ULLAGE
4)AVAILABLEINVENTORY
3)PHYSICAL
INVENTORY2)
DATE
A91460
A91100
C90426
225
450
236
713680646611578544734701667632598565531496463429394361327292708675641606809775740707673638
546579613648681715525558592627661694728763796830865898932967551584618653450484519552586621
772805839874907941751784818853887920954989
102210561091112411581193810844879676710745778812847
1-Jun2-Jun3-Jun4-Jun5-Jun6-Jun7-Jun8-Jun9-Jun
10-Jun11-Jun12-Jun13-Jun14-Jun15-Jun16-Jun17-Jun18-Jun19-Jun20-Jun21-Jun22-Jun23-Jun24-Jun25-Jun26-Jun27-Jun28-Jun29-Jun30-Jun
8/12/2019 Available Tankage Capacity
55/61
Table 18-26Lifting for Product Group Gasoline mGSHIPID
6)SHIPMENT
5)ULLAGE
4)AVAILABLEINVENTORY
3)PHYSICAL
INVENTORY2)
DATE 1)
A91790
A91820
A91500C90421
A91840
A91780A92130A91760
19
26
3535
18
4439120
217201184168251235219263247231214198181200183202186169171155138122105133155521505488472456
258274291307224240256212228244261277294275292273289306304320337353370342320-46-30-133
19
557573590606523539555511527543560576593574591572588605603619636652669641619253269286302318
1-Jun2-Jun3-Jun4-Jun5-Jun6-Jun7-Jun8-Jun9-Jun
10-Jun11-Jim12-Jun13-Jun14-Jun15-Jun16-Jim17-Jun18-Jun19-Jun20-Jun21-Jun22-Jun23-Jun24-Jun25-Jun26-Jun27-Jun28-Jun29-Jun30-Jun
8/12/2019 Available Tankage Capacity
56/61
Table 18-27Lifting for Product Group Kerosene mG R ACO
7SHIP
ID6)
SHIPMENT5)
ULLAGE4)
AVAILABLEINVENTORY
3)PHYSICAL
INVENTORY2)
DATE 1)
1-41-41-41-41-41-4
1-41-4
1-4
1-419
A9210A9211A9212
C90535A9183
C90428
A9150A9160
A9184
C90634
2922
44238
86199
64
80
266241216193
221197172429406381357332307370544520495470511486462437412389364340395370347322
453478503526
498522547290313338362387412349175199224249208233257440307330355379324349372397
867892917940
912936961704727752776801826763589613638663622647671696721744769793738763786811
1-Jun2-Jun3-Jun4-Jun
5-Jun6-Jun7-Jun8-Jun9-Jun
10-Jun11-Jun12-Jun13-Jun14-Jun15-Jun16-Jun17-Jun18-Jun19-Jun20-Jun21-Jun22-Jun23-Jun24-Jun25-Jun26-Jun27-Jun28-Jun29-Jun30-Jun
8/12/2019 Available Tankage Capacity
57/61
Table18-28Lifting for Product Group Diesel mGRADCODE
7)
SHIPID6)
S H I P M E N T5)
ULLAGE4)
A V A I L A B L EI N V E N T O R Y
3)
PHYSICALI N V E N T O R Y
2)DATE
1)1-8881-8881-8881-8881-8881-8851-8851-8851-8851-8881-8851-8881-8881-8881-8001-8881-8881-8881-8881-888
AC2878AJ2133C20425C20425GB2263AJ2134A29179A29210A29211A29212GB2269C290535AJ2135GB2270GB2268A29177A29183C20538AC2873A29197C20433
11904512
12914120
13111844137
20345
438
401320462
439356282
461381
609
646727585
608691765
586666
873
910991849
8729551029
850930
1-Jun
2-Jun3-Jun4-Jun
5-Jun6-Jun7-Jun
8-Jun9-Jun
8/12/2019 Available Tankage Capacity
58/61
1-888
1-8761-8881-888
1-8881-8881-8881-8761-888
1-8881-888-ooo
1-8881-4191-8881-888
AC2882
A29149A29150A29214
A29117AC2874AC2883A29172C20536C20427
AC2875A 29115C20427C20537C20427C20634A29147C20635
4
2556637
222352554590
31851484519080
22245
545466382555582536452369286795714
936852770686606
900817734873834
502581665492465511595678761252333
111195277361441
147230313174213
7668459297567297758599421025516597
375459541625705
411494577438477
10-Jun11-Jun12-Jun13-Jun14-Jun15-Jim16-Jun17-Jim18-Jim19-Jun20-Jun
21-Jun22-Jun23-Jun24-Jun25-Jun
26-Jun27-Jun28-Jun29-Jun30-Jun
8/12/2019 Available Tankage Capacity
59/61
Table 18-29Lifting for Product Group Fuel Oil mGSHIP
ID6)
SHIPMENT5)
ULLAGE4)
AVAILABLEINVENTORY
3)PHYSICAL
INVENTORY2)
DATE 1)
GA265
A9216A9144
A9150
A9154
A9056A9083
130518
32
130
65518
1200113610731009951888824122011561618155514911428139613321269120512721208114410811017954
890826763910847
13011237
272336399463521584648252316
-146-83-1944
76140203267200264328391455518582646709562625171235
602666729793851914978582646184247311374406470533597530594658721785848912976
1039892955501565
1-Jun2-Jun3-Jun4-Jun5-Jun6-Jun7-Jun8-Jun9-Jun
10-Jun11-Jun12-Jun13-Jun14-Jun15-Jun16-Jun17-Jun18-Jun19-Jun20-Jun21-Jun22-Jun23-Jun24-Jun25-Jun26-Jun27-Jun28-Jun29-Jun30-Jun
8/12/2019 Available Tankage Capacity
60/61
Table 18-30Lifting for Product Group Asphalt mSHIPID
6)SHIPMENT
5)ULLAGE
4)AVAILABLEINVENTORY
3)PHYSICAL
INVENTORY2)
DATE 1)
BA3101B39215B39218BS3116
BA3102
BA3103B39219
BS3118B39220
BA3105
5765
7
76
66
5
-11-8-12-7-4-1-4
-10-5-8
-10-14-16-19-21-10-13-10-12-15-12-16-18-21-23-20-17-20-17
454246413835384144394244485053554447444649465052555754515451
595660555249525558535658626467695861586063606466697168656865
1-Jun2-Jun3-Jun4-Jun5-Jun6-Jun7-Jun8-Jun9-Jun
10-Jun11-Jun12-Jim13-Jun14-Jun15-Jun16-Jim17-Jun18-Jim19-Jim20-Jun21-Jun22-Jun23-Jun24-Jun25-Jun26-Jun27-Jun28-Jun29-Jun30-Jun
8/12/2019 Available Tankage Capacity
61/61
each product group, are used for future physical inventory forecasts. LIand HI data for every product group tankage (Chapter 17) is used toestimate the available inventory:Available inventory = physical inventoryLLTotal volume available for storing a product group = (HILI)(HILI) = actual inventory + ullage
where ullage is estimated from the preceding relationship. The rest offormat for a single-ownership IUFS system is almost identical to that forjoint-ownership refineries discussed earlier.The IUFS is updated every time that A new refinery production estimate is done, typically, once a week.Refinery new production rates, for all product groups, based on thenew estimate, are entered in IUFS. The tankage capacity in a product group service is revised (due toreleasing a storage tank for maintenance or adding a tank, put back
in service after maintenance). There is a change in the ETA of a ship, a new shipment is inserted, ordata on an existing projected shipment is revised.