Determination of optimum CO2 water alternating gas (CO2-WAG) ratio in Sumatera Light Oilfield

Abdurrahman, Muslim; Hidayat, Fiki; Husna, Ully Zakyatul; Arsad, Agus

doi:10.1016/j.matpr.2020.04.495

Cited by 10 publications

(4 citation statements)

References 9 publications

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“…There is always an optimum WAG ratio in any WAG process, which depends on rock and fluid properties, so this ratio is expected to be different for each type of reservoir. Varying WAG ratios (1:1, 1:2, 1:5, 2:1, and 2:3) have been adopted for experimental and modeling studies on the WAG process in hydrocarbon reservoirs. , In heavy oil reservoirs, for instance, the optimum WAG ratio for achieving high oil recovery through WAG flooding was at 2:1. ,, In a light oilfield, the WAG ratio of 1:2 provides the best oil recovery factor . These conflicting reported results in homogeneous reservoirs (sandstone or carbonate) show that the WAG ratio has a very significant influence on the design of the CO 2 -WAG process and hence CO 2 -EOR and CO 2 sequestration in a mixed reservoir.…”

Section: Resultsmentioning

confidence: 99%

“…70,72,73 In a light oilfield, the WAG ratio of 1:2 provides the best oil recovery factor. 71 These conflicting reported results in homogeneous reservoirs (sandstone or carbonate) show that the WAG ratio has a very significant influence on the design of the CO 2 -WAG process and hence CO 2 -EOR and CO 2 sequestration in a mixed reservoir.…”

Section: Effect Of Co 2 -Wag Cycles On Co 2 Eor and Storage Mechanismsmentioning

confidence: 99%

“…Varying WAG ratios (1:1, 1:2, 1:5, 2:1, and 2:3) have been adopted for experimental and modeling studies on the WAG process in hydrocarbon reservoirs. 70,71 In heavy oil reservoirs, for instance, the optimum WAG ratio for achieving high oil recovery through WAG flooding was at 2:1. 70,72,73 In a light oilfield, the WAG ratio of 1:2 provides the best oil recovery factor.…”

Section: Effect Of Co 2 -Wag Cycles On Co 2 Eor and Storage Mechanismsmentioning

confidence: 99%

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CO₂ Sequestration and Enhanced Oil Recovery via the Water Alternating Gas Scheme in a Mixed Transgressive Sandstone-Carbonate Reservoir: Case Study of a Large Middle East Oilfield

et al. 2022

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The knowledge on CO2 sequestration and CO2 enhanced oil recovery (CO2-EOR) in mature mixed and interbedded hydrocarbon reservoirs are limited. In this vein, the feasibility of CO2-water alternating gas (CO2-WAG) for coupling CO2 sequestration and CO2-EOR in a mature mixed sandstone-carbonate reservoir was investigated using the S1A reservoir. First, core sample analysis and scanning electron microscopy (SEM) were conducted to evaluate the reservoir characterization. Next, a geological model with dual porosity and permeability was developed and transferred to a reservoir simulation model, and 21-year field production data were utilized for history matching and constraining of the reservoir model. Then, continuous CO2 and CO2-WAG injection methods were simulated using newly developed and history-matched geo-models and compared to assess their CO2-EOR and CO2 storage mechanisms and determine their potential in a mixed sandstone-carbonate reservoir. The effect of the anisotropic permeability ratio and hysteresis on CO2 storage mechanisms was addressed in this work. The results indicate that the CO2-WAG scheme can yield a +3% oil recovery factor than the continuous CO2 injection method, and CO2-WAG injection can utilize up to 14 and 12% of the total CO2 injected for residual and solubility trappings, respectively, while a minimal 2.9 and 0.03% was utilized from continuous CO2 injection for residual and solubility trappings, respectively. The WAG ratio of 2:1 could yield a higher recovery factor and greater CO2 utilization for solubility and residual trappings in a mixed reservoir. In mixed and interbedded reservoirs, geological anisotropy can also strongly influence reservoir performance during the CO2-EOR process, in which higher values of the anisotropy ratio (K v/K h) in CO2-WAG can yield greater oil recovery and more CO2 storage; also, hysteresis has great impact on residual trapping. This study provides valuable insights into the potential of CO2-WAG for CO2 sequestration and CO2-EOR in mature mixed and interbedded reservoirs.

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Section: Resultsmentioning

confidence: 99%

Section: Effect Of Co 2 -Wag Cycles On Co 2 Eor and Storage Mechanismsmentioning

confidence: 99%

Section: Effect Of Co 2 -Wag Cycles On Co 2 Eor and Storage Mechanismsmentioning

confidence: 99%

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CO₂ Sequestration and Enhanced Oil Recovery via the Water Alternating Gas Scheme in a Mixed Transgressive Sandstone-Carbonate Reservoir: Case Study of a Large Middle East Oilfield

et al. 2022

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“…In recent years, the combination of multiple displacement technologies to increase recovery has been evaluated and proven more effective. For example, water alternating gas (WAG) flooding, − nanoparticle/nanofluid-assisted water alternating gas (NWAG) flooding, − NPs and polymers synergistic combination, − NPs assisting foam flooding, − NPs assisting surfactant flooding, − surfactant alternating gas (SAG) flooding, ,, alkaline surfactant alternated gas (ASAG) flooding, − etc.…”

Section: Introductionmentioning

confidence: 99%

Review on Oil Displacement Technologies of Enhanced Oil Recovery: State-of-the-Art and Outlook

Wang

Han

et al. 2023

Energy Fuels

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Despite rapid advances in renewable energy extraction and utilization, global oil demand continues to rise. Oil displacement technologies are widely studied and applied because they can extract more oil in depleted reservoirs or recover unconventional ones. This study introduces research methods and mechanisms of four oil displacement technologies, i.e., water flooding, chemical flooding, gas flooding, and steam flooding. Although oil displacement technologies are helping to meet the growing demand for oil and energy, there are still some challenges for industrial applications. Some agents adopted in the oil displacement have shortcomings in the corrosion of mining equipment and damage to the reservoir structure. Therefore, solutions to the problem are crucial and are investigated widely in the literature using experiments and simulations. For experimental research, a diffusion framework for studying mass transfer in the oil displacement process and an experimental system for simulating oil displacement in offshore reservoirs should be built, which will facilitate the widespread industrial application of oil displacement technology. Therefore, it is necessary to improve the accuracy and expand the application range of the experimental system. As for numerical simulation, reaction kinetics research is essential for selecting displacement agent materials and preventing harmful gas leakage for industrial applications. However, the dynamics of foam flooding and CO2 flooding are not thoroughly studied. Moreover, it is an acceptable research topic that reducing the uncertainty of discrete regions is an effective method to improve the accuracy of numerical simulation results. For the broader application of oil displacement technology to industry, several mechanisms regarding the research field could be studied more thoroughly and comprehensively in the future, i.e., (1) the influence mechanisms of some impurities and complex reservoir physical properties, (2) the method of combining various oil displacement technologies, (3) the T-H-M-C multifield coupling oil displacement mechanism at micro/nanoscale, (4) the cement failure mechanism caused by CO2 and H2S, and (5) the tube brittle fracture mechanism caused by stress corrosion. For the sustainable development and efficient utilization of oil displacement, this review summarizes the extensive information about four oil displacement technologies, thus encouraging and providing research topics for further development and applications.

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Implications of Long Core Experiments in Oil Recovery Enhancement During Carbon Dioxide-Water Alternating Gas Injection

Zhan,

Gao,

Zheng

et al. 2024

Environmental Science and Engineering

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Determination of optimum CO2 water alternating gas (CO2-WAG) ratio in Sumatera Light Oilfield

Cited by 10 publications

References 9 publications

CO₂ Sequestration and Enhanced Oil Recovery via the Water Alternating Gas Scheme in a Mixed Transgressive Sandstone-Carbonate Reservoir: Case Study of a Large Middle East Oilfield

CO₂ Sequestration and Enhanced Oil Recovery via the Water Alternating Gas Scheme in a Mixed Transgressive Sandstone-Carbonate Reservoir: Case Study of a Large Middle East Oilfield

Review on Oil Displacement Technologies of Enhanced Oil Recovery: State-of-the-Art and Outlook

Implications of Long Core Experiments in Oil Recovery Enhancement During Carbon Dioxide-Water Alternating Gas Injection

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Determination of optimum CO2 water alternating gas (CO2-WAG) ratio in Sumatera Light Oilfield

Cited by 10 publications

References 9 publications

CO2 Sequestration and Enhanced Oil Recovery via the Water Alternating Gas Scheme in a Mixed Transgressive Sandstone-Carbonate Reservoir: Case Study of a Large Middle East Oilfield

CO2 Sequestration and Enhanced Oil Recovery via the Water Alternating Gas Scheme in a Mixed Transgressive Sandstone-Carbonate Reservoir: Case Study of a Large Middle East Oilfield

Review on Oil Displacement Technologies of Enhanced Oil Recovery: State-of-the-Art and Outlook

Implications of Long Core Experiments in Oil Recovery Enhancement During Carbon Dioxide-Water Alternating Gas Injection

Contact Info

Product

Resources

About

CO₂ Sequestration and Enhanced Oil Recovery via the Water Alternating Gas Scheme in a Mixed Transgressive Sandstone-Carbonate Reservoir: Case Study of a Large Middle East Oilfield

CO₂ Sequestration and Enhanced Oil Recovery via the Water Alternating Gas Scheme in a Mixed Transgressive Sandstone-Carbonate Reservoir: Case Study of a Large Middle East Oilfield