Optimization of design variables and control rules in field development under uncertainty: A case of intelligent wells and CO2 water alternating gas injection

Mirzaei‐Paiaman, Abouzar; Santos, Susana M.G.; Schiozer, Denis José

doi:10.1016/j.geoen.2023.211854

Cited by 7 publications

(2 citation statements)

References 32 publications

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“…There are several distinct methods of CO 2 flooding. The huff and puff process [19,20], the CO 2 foam injection [21,22], and the water-alternating-gas (WAG) injection [16,[23][24][25] method are among the most well known. The latter approach is based on alternating periods of continuous water and gas injection through one group of wells and the oil extraction through another group of wells.…”

Section: Introductionmentioning

confidence: 99%

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Monte Carlo Simulation of the CO2 Flooding Efficiency at a Core Scale for Different Oil Compositions

Andreeva,

Afanasyev

2024

Energies

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The evaluation of water-alternating-gas (WAG) efficiency and profitability is complicated by a large number of reservoir, operating, and economic parameters and constraints. This study aims at understanding the influence of the oil composition on different WAG injections. By employing compositional reservoir modeling and the Monte Carlo method to characterize the diversity of oils occurring in nature, we simulate the microscopic displacement efficiency of CO2 flooding when it is applied to both light- and heavy-oil reservoirs. We find that the economic performance of WAG in both miscible and immiscible scenarios is mainly characterized by the dimensionless injection rate and the oil density at surface conditions. Neither the bubble point pressure nor the minimum miscibility pressure can be used for the quantification of the optimal WAG parameters. We present our estimates of the best strategies for the miscible and immiscible injections and verify some of our previous results for randomly sampled oils. In particular, we demonstrate that CO2 flooding is better to apply at higher-dimensionless injection rates. We show that the injection of CO2 organized at a light-oil reservoir results in a higher profitability of WAG, although this comes at the cost of lower carbon storage efficiency.

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Section: Introductionmentioning

confidence: 99%

“…The efficiency of WAG can be compromised by low E v and E a due to the gravity override and channeling that causes an early breakthrough of injected gas to the producing wells [6,15,22,28,29]. Thus, E v and E a are mainly controlled by the reservoir heterogeneity and the wells spacing [25,30,31].…”

Section: Introductionmentioning

confidence: 99%

Monte Carlo Simulation of the CO2 Flooding Efficiency at a Core Scale for Different Oil Compositions

Andreeva,

Afanasyev

2024

Energies

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Estimation of distribution algorithms for well placement optimization in petroleum fields

Brum,

Coelho,

Santos

et al. 2024

Comput Geosci

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Analysis of different objective functions in petroleum field development optimization

Rostamian,

de Sousa Miranda,

Mirzaei-Paiaman

et al. 2024

J Petrol Explor Prod Technol

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Oilfield development optimization plays a vital role in maximizing the potential of hydrocarbon reservoirs. Decision-making in this complex domain can rely on various objective functions, including net present value (NPV), expected monetary value (EMV), cumulative oil production (COP), cumulative gas production (CGP), cumulative water production (CWP), project costs, and risks. However, EMV is often the main function when optimization is performed under uncertainty. The behavior and performance of different objective functions has been investigated in this paper, when EMV is the primary criterion for optimization under reservoir and economic uncertainty. One of the goals of this study is to provide insights into the advantages and limitations of employing EMV as the sole objective function in oil field development decision-making. The designed optimization problem included sequential optimization of design variables including well positions, well quantity, well type, platform capacity, and internal control valve placements. A comparative analysis is presented, contrasting the outcomes obtained from optimizing the EMV-based objective function against traditional objective functions. The study underscores the importance of incorporating multiple objective functions alongside EMV to guide decision-making in oilfield development. Potential benefits in minimizing CGP and CWP are revealed, aiding in the mitigation of environmental impact and optimization of resource utilization. A strong correlation between EMV and COP is identified, highlighting EMV’s role in improving COP and RF.

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Optimization of design variables and control rules in field development under uncertainty: A case of intelligent wells and CO2 water alternating gas injection

Cited by 7 publications

References 32 publications

Monte Carlo Simulation of the CO2 Flooding Efficiency at a Core Scale for Different Oil Compositions

Monte Carlo Simulation of the CO2 Flooding Efficiency at a Core Scale for Different Oil Compositions

Estimation of distribution algorithms for well placement optimization in petroleum fields

Analysis of different objective functions in petroleum field development optimization

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