1-Create a geological model of sandstone reservoir from scratch. 2-To investigate the macroscopic & microscopic sweep efficiency between voidage replacement and production balancing. 3-To optimize the incremental oil recovery and CO2 sequestration in a sandstone reservoir. Voidage Replacement Ratio (VRR)/ Production Balancing strategy/ CO2 Sequestration/ (WAG) Process
Ähnlich wie Voidage Replacement And Production Balancing Strategy To Optimize The Incremental Oil Recovery And CO2 Sequestration In sand Stone Reservoir.pdf
IRJET- Optimization of Field Development Scheduling and Water Injection Study...IRJET Journal
Ähnlich wie Voidage Replacement And Production Balancing Strategy To Optimize The Incremental Oil Recovery And CO2 Sequestration In sand Stone Reservoir.pdf (20)
Seismic Hazard Assessment Software in Python by Prof. Dr. Costas Sachpazis
Voidage Replacement And Production Balancing Strategy To Optimize The Incremental Oil Recovery And CO2 Sequestration In sand Stone Reservoir.pdf
1. Presenter :Enas Rajeh Al-Jamal
Supervisor :Ir. Bonavian Hasiholan
Examiner: Mr. A.M.Y. Sami
VoidageReplacement And ProductionBalancingStrategy To OptimizeThe
IncrementalOil RecoveryAnd CO2 SequestrationIn sandStoneReservoir
4/8/2019 1
3. OBJECTIVES
1-Create a geological model of sandstone reservoir fromscratch.
2-Toinvestigate the macroscopic & microscopic sweep efficiency between
voidage replacementand production balancing.
3-Tooptimize the incremental oil recoveryand CO2 sequestrationin a sandstone
reservoir.
OBJECTIVES
4/8/2019 3
5. Voidage Replacement Ratio
(VRR)
It’s the pressure maintenance.
When replacing the volume of oil, gas, and water produced from the
reservoir by injected fluids.
INTRODUCTION
4/8/2019 5
7. CO2 Sequestration
It’s the storage of CO2 into long-term storage to prevent the
environmental effect from the emission of CO2.
INTRODUCTION
4/8/2019 7
8. (WAG) Process
Water Alternating Gas process is a form of tertiary recovery applied
by the injection of Gas and Water Alternatively.
INTRODUCTION
4/8/2019 8
9. Problem statement
Problem statement
4/8/2019 9
1. Global warming caused by CO2 emission.
2. Severe decline in reservoir pressure during production.
3. Poor sweep efficiency by conventional recovery methods.
4. progressive shortage of the world petroleum reserves.
11. LITERATURE REVIEW
LITERATURE REVIEW
4/8/2019 11
No Author Title & Publisher
1 Jr. Robert,
Ludoophlen
Voidage replacement ratio calculations in retrograde
condensate to volatile oil reservoirs undergoing EOR
processes (SPE)
2 Vicente, M ;
Crosta, D
Determination of Volumetric Sweep Efficiency in Barrancas
Unit, Barrancas Field. (SPE)
3 Touray, Saikou EFFECT OF WATER ALTERNATING GAS INJECTION ON
ULTIMATE OIL. (Dalhousie University)
4 jackson, d d;
Andrews, G L;
Claridge, L E
optimum WAG ratio vs. Rock wettability in CO2 flooding
(SPE)
12. LITERATURE REVIEW
LITERATURE REVIEW
4/8/2019 12
No Author Title & Publisher
5 Romero-Zerón,
Laura
Advances in Enhanced Oil Recovery Processes. (SPE)
6 Tosun, I. (2013) Solubility of Gases in Liquids
7 Shiralkar, G. S.,
& Stephenson, R.
E.
Predictable control of reservoir pressure through voidage
replacement
13. Factors Affecting WAG Process
LITERATURE REVIEW
a) Fluid characteristics and rock-fluid interaction
b) Reservoir stratification and heterogeneity
c) WAG ratio
d) WAG cycle time
e) WAG injection patterns
f) Pressure rates for production & injection wells
4/8/2019 13
14. Microscopic & Macroscopic Sweep
efficiencies
-Volumetric sweep better by water >> Macroscopic .
-Displacement sweep better by gas >> Microscopic .
LITERATURE REVIEW
4/8/2019 14
17. Reservoir-E Description
METHODOLOGY
4/8/2019 17
1. Reservoir dimensions as simulation model:
2. 21: no of columns in the X-direction
3. 19: no of rows in the Y-direction
4. 14: no of geological layers in the Z-direction
18. Reservoir-E Description
METHODOLOGY
4/8/2019 18
Item Description
8000 Datum depth of the reservoir (feet)
2500 Initial datum pressure (psi) at the datum depth
9600 The depth of oil-water contact (feet)
0.42 Initial oil saturation
0.57 Initial water saturation
25. Oil Recovery Plans
Primary
plan
WAG plan
VRR &
PRBL
• Scenario-1
• Scenario-2
• Scenario-3
Best
scenario
• Scenario-5
• Scenario-4
• Scenario-3
• Scenario-2
• Scenario-1
Best
scenario • With ratio 0.8
• With ratio 0.9
• With ratio 1.0
• With ratio 1.1
• With ratio 1.2
Best
scenario
Primary plan
Secondary plan
VRR & PRBL
Using ECLIPSE software:
25
4/8/2019
METHODOLOGY
• CO2 Low Solubility.
• CO2 Optimum Solubility
• CO2 High Solubility.
Co2 Storage
CO2
Storage
Best
scenario
28. METHODOLOGY
4/8/2019 28
CO2 Sequestration Code
CO2SOL is added under RUNSPEC ECLIPSE section together
with DISGAS.
CO2 properties are added under PROPS ECLIPSE section.
36. RESULT &
DISCUSSION
4/8/2019 36
PRIMAR RECOVERY (Scenario-3)
• New 6 Production wells with 9000 STB/D Oil flow rate and 750 psi BHP.
• Perforation was controlled through geological layers.
•
38. Waterflooding was conducted through:
1. Scenario-1 with 3 WAG injection wells.
2. Scenario-2 with 5 WAG injection wells.
3. Scenario-3 with 9 WAG injection wells of cycle time of 365 day.
4. Scenario-4 with 9 WAG injection wells of cycle time of 180 day.
5. Scenario-5 with 9 WAG injection wells of cycle time of 280 day.
38
4/8/2019
RESULT &
DISCUSSION
Secondary (WAG) Plan
59. RESULT &
DISCUSSION
4/8/2019 59
CO2 SEQUESTRATION
Solubility scenarios (Low, Optimum, High)
STRATEGY
ProductionBalancingstrategy
(PRBL)
Voidage
Replacement
strategy
Solubility of CO2 LOW LOW
FOE 64.28% 63.12%
FGIT (MSCF) 3.154*10^13 3.663*10^13
FGPT(MSCF) 2.035*10^13 2.968*10^13
CO2 stored(MSCF) 1.118*10^13 6.947*10^12
STRATEGY
ProductionBalancing
strategy (PRBL)
Voidage
Replacement
strategy
Solubility of CO2 OPTIMUM OPTIMUM
FOE 63.88% 62.64%
FGIT(MSCF) 3.282*10^13 3.683*10^13
FGPT(MSCF)
1.991*10^13 2.807*10^13
CO2 stored(MSCF) 1.291*10^13 8.763*10^12
60. RESULT &
DISCUSSION
4/8/2019 60
CO2 SEQUESTRATION
Solubility scenarios (Low, Optimum, High)
STRATEGY
Production Balancing strategy
(PRBL)
Voidage Replacement strategy
Solubility of CO2 HIGH HIGH
FOE 62.64% 61.98%
FGIT 3.578*10^13 3.566*10^13
FGPT 2.088*10^13 2.455*10^13
CO2 stored 1.490*10^13 1.110*10^13
63. RESULT &
DISCUSSION
4/8/2019 63
ECONOMIC ANALYSIS
Net Profit Value of Recovery Plans
Production stage
Net profit value ( NPV)
(Billion.USD)
Base case $18.3
Primary best scenario-3 $43.9
Secondary best scenario-3 $78.9
Viodage replacement best
scenario-3
$80.6
Production balancing scenario-
3
$81.4
NPV was increased
by 63.1 Billion USD$
recovery plans over
the base case
recovery.
65. CONCLUSION
4/8/2019 65
Research Conclusion
RF was increased from 10.8% to 62.64% (PRBL 1.2).
VRR of 1.2 increases FOE but results in an early water cut.
PRBL results in higher FOE due to late water cut.
PRBL maintains the reservoir pressure more than VRR.
Sweep efficiency was enhanced macroscopically and
microscopically in a better way in PRBL than VRR.
CO2 solubility is proportional to the pressure of injection.
Higher CO2 solubility results in higher CO2 sequestration.
NPV was increased from 18.3 billion USD$ to 81.4 billion USD$.
66. CONCLUSION
4/8/2019 66
Recommendation
Frequently use CO2 as injected fluid in WAG to decrease its
emission.
Use production balancing strategy rather than voidage
replacement.
Avoid using CO2STORE simulation method in a reservoir
containing hydrocarbon.
Research about methods to prevent the leakage of CO2 during
sequestration.
69. Price and Cost of Field Activities
Capital investment and operation costs
INVESTMENTITEM COST(USD$)
Monthly field operation 200,0000
Vertical well 1,000,000
Horizontal well 3,000,000
Water injection well setup 500,000
Gas injection well setup 1,000,000
WAG injection well setup 2,000,000
Injected water 1.0 per STB
Injected Carbon Dioxide 4.0 per MSCF
Water production 5.0 per STB
INCOME SALEPRICE (USD$)
Oil 60 per STB
Gas 4.0 per MSCF
69
Sale price of oil and gas produced
8/25/2015