Eor Course 2012 Lecture#1 Introduction
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Transcript of Eor Course 2012 Lecture#1 Introduction
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TRIPOLI UNIVERSITYFACULTY OF ENGINEERING
PETROLEUM ENGINEERING DEPARTMENT
ENHANCED OIL RECOVERYENHANCED OIL RECOVERY
PE510 PE510
Fall 2013Fall 2013
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ENHANCED OIL RECOVERY PE 510
DR. MOHAMED EL-HOUNI DR. MOHAMED EL-HOUNI
Fall 2013Fall 2013
INTR
OD
UC
TIO
N
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Class Schedule
Saturday 14:00 – 15:30 Thursday 14:00 – 15:30
TRIPOLI UNIVERSITYFACULTY OF ENGINEERING
PETROLEUM ENGINEERING DEPARTMENT
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Course Outlines
Introduction
Reserves
Phase Behavior
Enhanced Oil Recovery (EOR) Processes
Currently Used EOR Processes
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Course Outlines
EOR methods used to improve reservoir recovery efficiency, and explain their differences For each method, state whether it can improve displacement, vertical or areal sweep efficiency and explain how it works.
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screening criteria for enhanced oil recovery methods.
Course Outlines cont….
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Course Outlines cont….
Understand Fractional flow theory and Buckley- leverett 1-D displacement
Evaluate the effect of relative permeabilities and fluid viscosities in the fractional flow equation
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Course Outlines cont….
Estimate oil recoveries using Buckley- Leverett, Styles & Dykstra-Parson methods
Planning for water flooding.
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GRADE DISTRIBUTION
Home Works 05% Quizzes 05% Test I 20% Test I 20% Final 50%
TRIPOLI UNIVERSITYFACULTY OF ENGINEERING
PETROLEUM ENGINEERING DEPARTMENT
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INTRODUCTIONReserves
Quantities of petroleum from known accumulations available for production and quantities which are anticipated to become available within a practical time frame through additional field development, technological advances or exploration
SourceJanuary 1996 issue of the SPE Journal of Petroleum Technology and in the June 1996 issue of the WPC (World Petroleum Congresses) Newsletter.
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The SPE formulates rules for estimating reserves
Reserves are volumes that will be produced under current operating practices, prices, taxes, costs, etc.
Three categories of reserves: Proved, Probable and Possible
Proved is most important.
INTRODUCTIONReserves
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Proved Reserves
Must be at least 90% likely to be produced Must be based on the actual production tests
or similar highly reliable information. May be reported to various agencies,
stockholders and the general public Are “estimated” and change with time.
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Probable and Possible Reserves
Rarely reported outside the company Useful to keep track of future opportunities. Measures of exploratory success Resources are not expected to be produced
unless some critical factor (usually economics) changes in the future.
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INTRODUCTIONReserves
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Greatest Oil Reserves as of year 2006
264.3
178.8
132.5115
101.5 97.879.7
6039.1 35.9
21.4 18.3 15.2 12.9 11.4 11.2 9 7.7 7 5.8
0
50
100
150
200
250
300
Pro
ved
rese
rves
(bill
ion
barr
els)
Source: Oil & Gas Journal, Vol. 103, No. 47 (Dec. 19, 2005). From: U.S. Energy Information
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Greatest Gas Reserves as of year 2006
1,680
971911
241 214 193 185 161 151 112 98 84 75 71 66 65 62 59 57 56
0
200
400
600
800
1,000
1,200
1,400
1,600
1,800
Pro
ved
rese
rves
(tri
llion
cu
ft)
Source: Oil & Gas Journal, Vol. 103, No. 47 (Dec. 19, 2005). From: U.S. Energy Information Administration.
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Oil Recovery
Primary recovery, using only the natural
energy of reservoirs, typically recovers up to
50% of OOIP (average 19%).
Secondary recovery involves adding energy
to the natural system by injecting water to
maintain pressure and displace oil (also known
as waterflood). Typical recoveries are 25-45% of OIP after primary recovery (average 32%).
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Oil Recovery
Tertiary recovery includes all other methods
used to increase the amount of oil recovered.
Typical recoveries are 5-20% of OIP after
primary and secondary recovery (average 13%)
Secondary and tertiary recovery are together
referred to as enhanced oil recovery (EOR).19% + 26% =(100-19) x 32% + 7% =(100-45)x13% = 52%
Tertiary
Primarysecondary
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Oil Recovery
Petroleum reserves definitions are not static and will be revised as additional geological or engineering data become available or as economic conditions change
Reserves may be attributed to either natural energy or IMPROVED RECOVERY METODS
Facts
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Methods to Improve Recovery Efficiency
D I S C O V E R Y
Artificial Lift
Methods to ImproveRecovery Efficiency
Enhanced Oil Recovery Production/Injection Control
Natural Flow
Strategic Wellbore Placement
Conventional Oil Recovery
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Enhanced Oil Recovery (EOR) Processes
Enhanced oil recovery (EOR) processes include all methods that use external sources of energy and/or materials to recover oil that can not be produced, economically by conventional means.
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Currently Used EOR Processes
Water flooding Thermal methods: steam stimulation, steam
flooding, hot water drive, and in-situ combustion
Chemical methods: polymer, surfactant, caustic and micellar/polymer flooding.
Miscible methods including: hydrocarbon gas, CO2, nitrogen, flue gas
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Phase Behavior
Any fluid can exist in vapour, liquid or solid phase depending on the conditions at which it is subjected. Solids, liquids and gases are phases of matter, which do exist in different states depending on the values of pressure and temperature.
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Phase Behavior
The Reservoir Hydrocarbon…Fluid Type: Non-Volatile Oil Volatile Oil Condensate Gas Wet Gas Dry Gas
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Basic Phase Behavior
TEMPERATURE
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Phase Behavior
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Phase Diagram of a Phase Diagram of a Black Oil ReservoirBlack Oil Reservoir
Temperature
Pre
ss
ure
Initial Reservoir Conditions
CPPath of Production
Separator Conditions
25%50%75%
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Temperature
Pre
ss
ure
Path of Production
Initial Reservoir Conditions
Separator Conditions
CP
Phase Diagram of a Phase Diagram of a Dry Gas ReservoirDry Gas Reservoir