The Puguang Gas Field in Sichuan Basin of Chinaccop.or.th/eppm/projects/3/docs/8) China... · The...
Transcript of The Puguang Gas Field in Sichuan Basin of Chinaccop.or.th/eppm/projects/3/docs/8) China... · The...
The Puguang Gas Field in Sichuan Basin of China
-a case study for natural gas development issues
9 Oct 2008
Outline1 An Overview of Puguang Gas Field1. An Overview of Puguang Gas Field
2.Project PlanjFracture prediction of carbonate reservoir
S h l l lf d i iSour nature gas phase, elemental sulfur deposition
prediction and its controlling & prevention techniques
Edge/bottom water utilization and invasion controlling
CO2 capture and storage
Puguang gas field located at the
1 An Overview of Puguang Gas FieldPuguang gas field, located at the
northeast of Sichuan Basin, was
discovered in 2003. It is the largest
carbonate high so r gas field incarbonate high sour gas field in
China. Gas in initial place(GIIP) of
Puguang has reached 300×109m3.
It, desinged raw gas production 12 billion per year, will be put into production in 2009.
Reservoir Characteristics
Reservoir pressure:
55-57MPa
Sour gas content:
H2S15.2%、 CO28.6%
Reservoir depth:Reservoir depth:
4800-5800m
3D model of Puguang gas reservoir
Elevation of water depth: RDGR
普 光 10
RD10100000
GR0 90
普 光 9
VLLD10100000
VGR0 90
P20 1- 2
RDGR
普 光 6
海 拔
Reservoir Characteristics
Elevation of water depth:Two diffirent water-gas
systems. Changxing
5300
5400
5500
5600
101000000 90
5200
5300
5400
101000000 90
4600
4700
4800
101000000 90
4800
4900
5000
5100
101000000 90( m)- 4 2 09
- 4 2 59
- 4 3 09
- 4 3 59
- 4 4 09
- 4 4 59
- 4 5 09飞systems. Changxing
formation :-5230m
5600
5700
5800
5900
5500
5600
5700
5800
4900
5000
5100
5200
5200
5300
5400
- 4 5 59
- 4 6 09
- 4 6 59
- 4 7 09
- 4 7 59
- 4 8 09
- 4 8 59
1+2 段兴
长
Feixianguan formation: -5111m
6000
6100
6200
6300
5900
6000
6100
53005500
- 4 9 09
- 4 9 59
- 5 0 09
- 5 0 59
- 5 1 09
- 5 1 59
- 5 2 09
- 5 2 59
海拔-5111m
海拔-
组兴
Reservoir type:structural- lithologic b t
6400
6500
6200
6300
- 5 3 09
- 5 3 59
- 5 4 09
- 5 4 59
海拔5230m
carbonate sour gas reservoir
NO.P6-P10well reservoir profile
Project Plan(1)Fracture prediction techniques of carbonate reservoirFractures developed largely in Puguang gas field,
which can be recognized by core observation and FMI.
(1)Fracture prediction techniques of carbonate reservoir
The calculated results of fracture Fracture occurrenceFMIFormation
series
formation
倾向:南南西Fei
xian guan
Lower
Trias
Fei xian
Fractures developed
走向:北西西
guanTriassic gua
n
5078 00 5116 00 m
Fractures developed largely in the bottom of Feixianguan formation from FMI interpretation
西
-南东东
Upp
5180.00 – 5220.40 m
5078.00 – 5116.00 m5123.80 – 5148.00 m5156.00 – 5170.00 m
倾角:240
-580
changxing
Upper
permian
ProblemsFracture prediction is difficult in the world ,and which is the challenge in p g
Puguang gas field.
Genetic mechanism of fracture :relationship among strata formation,
lithology, lithofacies and fracture development is not clear.
Seismic methods of fracture prediction:most of the methods are
lit ti d biqualitative and ambiguous.
Quantitative modeling fracture :quantitative description of effective
fracture distribution is very difficult.
●Fine description of fractured carbonate outcrop: the rules and mechanisms of fracture developing
Workshops
mechanisms of fracture developing.
●Mechanical simulation of fracture: the mechanism of fracture developing the relationship between fracture developing anddeveloping, the relationship between fracture developing and structure&lithology.
●Identification method of fractures: how to identify natural●Identification method of fractures: how to identify natural effective fractures and induced ones based on FMI, and the accuracy of fracture identification based on conventional well log.
● 3D seismic quantitative fracture prediction: seismic data quality, prediction methods.
● Modeling methods of fracture reservoir.
Plan & Schedule
•Workshops and experts visiting : 2~3
•Expert team: Norway, Canada, United States or
CCOP MC t 3 5CCOP MC experts 3~5
•Venue: ChinaVenue: China
•Time:2009~2010
Project Plan
(2)Sour nature gas phase, elemental sulfur deposition prediction and its controlling & prevention techniques
Problems
It is very difficult to get sour gas phase y g g p
experiment data.H2S, a toxic and corrosive
gas usually makes experiment apparatus leakgas , usually makes experiment apparatus leak,
even brings to human being or animals damage.
It has great deviation on elemental sulfur
deposition prediction in complex formation and
multiphase percolation.
General sulfur solvents are poor efficient ,
on the other hand, high efficient sulfur
solvents are not only expensive but alsosolvents are not only expensive but also
unable recycled which always make pollution.
Elemental sulfur deposited in formation far
away from the wellbore or fracture could not
be resolved by any sulfur solventbe resolved by any sulfur solvent.
Workshops•High sour gas phase experiment programs and phase h t i ticharacteristics,•Elemental sulfur saturation experimental test and prediction modelprediction model , •Physical simulation of elemental sulfur deposited in different media,,•Modeling elemental sulfur deposition in different flow media and multiphase, •Developing economic, effective and clean sulfur solvent, ••Measurements to resolve elemental sulfur deposited in deep formation.
Plan & Schedule
•Workshops or experts visiting: 2~3
•E t t C d U it d St t F•Expert team: Canada, United States , France
or CCOP MC experts 2~3
•Venue: China
•Time:2009~2010
Project Plan
(3)Edge/bottom water efficient utilization and invasion controlling
It could enhance the natural gas recovery if edge/bottom water has been actively controlled and used its drive energy. Otherwise it would certainly cause water fast fingering, forming the seal gas
Possible problems that water invasion creates during sour gas
range and creating the gas well flooding.
field development:Pipelines and equipments corrosion rate increased,
Gas well production and gas recovery decreased,
It is difficult to treat produced water, which brings problems to the environmental protectionproblems to the environmental protection.
Workshops
Methods preventing water irregular
coning/movementconing/movement,
Sealed gas second development
techniques,
Water gas well safe production andWater gas well safe production and
corrosion protection ,
Wasted water reinjection and storage.
Plan & Schedule
•Workshops and experts visiting: 2~3
•Expert team: Russian ,United States or CCOP MC
experts 2~3.
•Venue: China
• i 2009 2010•Time:2009~2010
Project Plan
(4)CO2 capture and storage Technical aspect and questions
SINOPEC has attached importance to
p q
CO2 purify and processing. The Puguang
gas field located at mountain land and
many gas pools scattered distributed are y g p
apart from the purification factory.
It ,therefore, has a
long way to go for g y g
economic and
effective sour gas
field development.
But the CO2 capture
and storage projects
were few that made
China petroleumChina petroleum
companies lack the
related experiencerelated experience.
Workshops
Gas pool produced CO2 economic
clean capture and storageProductionProduction
clean capture and storage,
Super critical properties of CO2
InjectionInjection
and the effect to its reinjection,
CO2 corrosion protection and Acid gas slugAcid gas slugO il
arly
ggy
CO2 corrosion protection and
corrosion monitoring.Acid gas Mixing Zone Acid gasAcid gas
Plan & Schedule
•Workshops and experts visiting: 2~3
•Expert team: Norway, Canada, United States or
CCOP MC experts 2~3.
•Venue: China
• i 2009 2011•Time:2009~2011
W l t P fi ld!Welcome to Puguang gas field!