1. introduction to re - uncensored
DESCRIPTION
OIl fieldTRANSCRIPT
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VIETNAM OIL & GAS GROUP
PETROVIETNAM UNIVERSITY
INTRODUCTION
Lecturer : Nguyen Viet Khoi Nguyen, MSc.
Email : [email protected]
Website : www.pvu.edu.vn
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
References
1. Công nghệ mỏ ứng dụng, Huỳnh Thanh Sơn & Lê
Phước Hảo, NXB ĐHQG Tp.HCM, 2003.
2. Applied Petroleum Reservoir Engineering, Craft
B.C, Hawkins M.F and Terry R.E, Prentice-Hall Inc.,
New Jersey, 1991. (here)
3. Petroleum Engineering Handbook for the Practicing
Engineer Vol.1, Mian M.A, PennWell Publishing Co.,
Oklahoma, 1992.
4. Reservoir Engineering Handbook (4th edition), Tarek
Ahmed, Gulf Professional Publishing, 2010. (here)
5. Multiphase Flow in Wells, James P. Brill & Hemanta
Mukherjee, SPE, 1999. (here)
2
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
Introduction
4
What is Reservoir?
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
Tasks of Reservoir Engineer
5
Estimation of HC Volumes in place
Calculation of recovery factors
Estimation of recovery time
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
History of RE
6
− In 1937, Muskat tried to attempt to
organize the concepts of fluid flow in
porous media into a formal discipline
from research of:
Fancher et al. – fundamental rock
properties. (1933)
Schilthuis – Subsurface samples of oil and
gas for measuring fluid properties. (1935)
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
History of RE
7
− 1942, Buckley and Leverett contributed to
the understanding of oil and gas
displacement
− 1946, Tarner showed the equation for
dertermining the recovery of oil under
solution-gas drive
− 1949, Everdingen and Hurst solved the
equations to predict the flow of water from
an aquifer (included paper of Hurst in 1943)
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
History of RE
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− 1955, Moore reviewed the previous 25
years of RE history and look forward to the
next 25 years.
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
History of RE
9
− About the Decline curves to model
production history and forecast production
From 1908 to 1943, many papers were
introduced and improved the method by a lot of
experts in oil industry.
1945, Arps formalized this technique and
improved in 1956
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
History of RE
10
Classification of Production Decline Curves
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
History of RE
11
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
Drive Mechanisms
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Solution-Gas Drive
Gas-Cap Drive
Waterdrive
Gravity Drive
Compaction Drive
Imbibition Drive
Combination Drive
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
Trapping Mechanisms
13
Structural Traps
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
Trapping Mechanisms
14
Structural Traps
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
Trapping Mechanisms
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Stratigraphic Traps
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
Trapping Mechanisms
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Fault Traps
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
Trapping Mechanisms
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Hydrodynamic Traps
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
Trapping Mechanisms
18
Combination Traps
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
Trapping Mechanisms
19
Combination Traps
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
Estimating Reserves
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
Estimating Reserves
21
7758 1 wi
R F
oi
Ah SN R
B
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
Estimating Reservoir Bulk Volume
22
Calculating the Reservoir Bulk Volume
Trapezoidal rule:
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
Estimating Reservoir Bulk Volume
23
Calculating the Reservoir Bulk Volume
Trapezoidal rule:
1 1
1
1
2
n
i i i i
i
Ah h h A A
1 2 1
12 ... 2
2n nAh h A A A A
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
Estimating Reservoir Bulk Volume
24
Calculating the Reservoir Bulk Volume
Example 1.1: Calculate the reservoir volume
Depth, ft Area, acres
2,900 20
2,925 35
2,950 50
2,975 70
3,000 95
3,025 110
3,050 130
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
Estimating Reserves
25
Calculating the Reserves
Example 1.2: Geological contouring of a yet to
be explored region indicates that the drainage
area of a potential HC reserves is given from
example 1. The porosity of nearby regions in
the same zone is 23% and the water
saturation is 20%. If the formation volume
factor is assumed to be 1.2 bbl/STB and the
recovery factor is estimated to be 0.19.
Calculate the potential reserves
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
Estimating Gas Reservoir
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Similar to oil reservoirs, to estimate the gas
in place:
43560 1 wi
i
gi
Ah SG
B
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
Estimating Gas Reservoir
27
Remaining gas at the time of abandonment:
43560 1 wi
a
ga
Ah SG
B
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
Estimating Gas Reservoir
28
Calculating the gas reserves:
1 1
43560 1R i a wi
gi ga
G G G Ah SB B
43560 1 wi
R F i F
gi
Ah SG R G R
B
ga gi
F
ga
B BR
B
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
Estimating Gas Reservoir
29
Exercise 1.1:
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
HC Phase Behavior
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
HC Phase Behavior
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
HC Phase Behavior
32
Black Oil
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
HC Phase Behavior
33
Black Oil
Liquid-shrinkage curve for black oil
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
HC Phase Behavior
34
Black Oil
Liquid-shrinkage curve for black oil
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
HC Phase Behavior
35
Volatile Oil
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
HC Phase Behavior
36
Volatile Oil
Liquid-shrinkage curve for volatile oil
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
HC Phase Behavior
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Liquid-shrinkage for crude oil systems
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
HC Phase Behavior
38
Retrograde gas – Condensate
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
HC Phase Behavior
39
Wet gas
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
HC Phase Behavior
40
Dry gas
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
HC Phase Behavior
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Effect of Changing the System Composition:
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
More information
42
Formation Volume Factor (FVF)
Oil:
Oil Volume in Res
Oil Volume in Stock TankoB
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
More information
43
Formation Volume Factor (FVF)
Gas:
Rg
sc
VB
V
R
znRTV
p
sc scsc
sc
z nRTV
p
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Reservoir EngineeringNguyen Viet Khoi Nguyen, MSc
More information
44
Formation Volume Factor (FVF)
Gas:
0.0282g
zTB
p