Infill well placement optimization for secondary development of waterflooding oilfields with SPSA algorithm
A significant amount of bypassed oil resources often remain in a mature waterflooding reservoir because of non-uniform sweep caused by natural complexities of a subsurface reservoir and improper management of the reservoir. Infill drilling is one of the most attractive options for increasing oil rec...
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| Format: | Article |
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Frontiers Media S.A.
2022-11-01
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| Series: | Frontiers in Energy Research |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fenrg.2022.1005749/full |
| _version_ | 1811225257765240832 |
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| author | Congcong Li Chaoqiang Fang Yougen Huang Hailong Zuo Zhang Zhang Shuoliang Wang |
| author_facet | Congcong Li Chaoqiang Fang Yougen Huang Hailong Zuo Zhang Zhang Shuoliang Wang |
| author_sort | Congcong Li |
| collection | DOAJ |
| description | A significant amount of bypassed oil resources often remain in a mature waterflooding reservoir because of non-uniform sweep caused by natural complexities of a subsurface reservoir and improper management of the reservoir. Infill drilling is one of the most attractive options for increasing oil recovery in consequence of its operational simplicity, low risk and promising results. Determining optimal infill well placements in heterogeneous mature reservoirs is a critical and challenging task that has a significant impact on the recovery performance and economic revenue of subsurface remaining oil resources. An integrated framework is constructed to attain best-obtained optimal location and completion of infill wells in multi-layer mature oil reservoirs. The placement of an infill vertical well is parameterized in terms of two sets of variables that define the location and completion respectively. A variant of SPSA algorithm is used to solve the defined optimization problem. The performance of the proposed algorithm is first tested for the joint optimization of well location and completion of an injection well using a synthetic model. The results show that the algorithm with average SPSA gradients outperforms the single SPSA gradient method both in solution and convergence rate. Besides, there are two plateaus on the performance curve of all algorithms: on the first plateau, each algorithm is approaching to its optimal well location with relatively little change on the completion parameters, while on the second plateau, each algorithm obtains the corresponding optimal completions. A complex heterogeneous reservoir model is then constructed by using the data of a mature oil reservoir in Shengli Oilfield in China to design an optimal 10 years’ infill drilling program. Four vertical production wells are placed in the oil-rich regions and both simultaneous and sequential algorithms are tried to obtain their optimal locations and completions. The performances of simultaneous joint optimization and sequential joint optimization are compared and as a result it is recommended to use sequential joint optimization as the optimization algorithm in the integrated framework. |
| first_indexed | 2024-04-12T09:02:50Z |
| format | Article |
| id | doaj.art-9dc58c5ff8814dae8de36b7f0ebe549f |
| institution | Directory Open Access Journal |
| issn | 2296-598X |
| language | English |
| last_indexed | 2024-04-12T09:02:50Z |
| publishDate | 2022-11-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Energy Research |
| spelling | doaj.art-9dc58c5ff8814dae8de36b7f0ebe549f2022-12-22T03:39:10ZengFrontiers Media S.A.Frontiers in Energy Research2296-598X2022-11-011010.3389/fenrg.2022.10057491005749Infill well placement optimization for secondary development of waterflooding oilfields with SPSA algorithmCongcong Li0Chaoqiang Fang1Yougen Huang2Hailong Zuo3Zhang Zhang4Shuoliang Wang5School of Energy, China University of Geosciences, Beijing, ChinaCNPC Logging Company Limited Geological Research Institute, Beijing, ChinaCNPC Exploration and Development Research Institute of Changqing Oilfield Branch, Xi’an, ChinaCNPC Exploration and Development Research Institute of Changqing Oilfield Branch, Xi’an, ChinaSchool of Energy, China University of Geosciences, Beijing, ChinaSchool of Energy, China University of Geosciences, Beijing, ChinaA significant amount of bypassed oil resources often remain in a mature waterflooding reservoir because of non-uniform sweep caused by natural complexities of a subsurface reservoir and improper management of the reservoir. Infill drilling is one of the most attractive options for increasing oil recovery in consequence of its operational simplicity, low risk and promising results. Determining optimal infill well placements in heterogeneous mature reservoirs is a critical and challenging task that has a significant impact on the recovery performance and economic revenue of subsurface remaining oil resources. An integrated framework is constructed to attain best-obtained optimal location and completion of infill wells in multi-layer mature oil reservoirs. The placement of an infill vertical well is parameterized in terms of two sets of variables that define the location and completion respectively. A variant of SPSA algorithm is used to solve the defined optimization problem. The performance of the proposed algorithm is first tested for the joint optimization of well location and completion of an injection well using a synthetic model. The results show that the algorithm with average SPSA gradients outperforms the single SPSA gradient method both in solution and convergence rate. Besides, there are two plateaus on the performance curve of all algorithms: on the first plateau, each algorithm is approaching to its optimal well location with relatively little change on the completion parameters, while on the second plateau, each algorithm obtains the corresponding optimal completions. A complex heterogeneous reservoir model is then constructed by using the data of a mature oil reservoir in Shengli Oilfield in China to design an optimal 10 years’ infill drilling program. Four vertical production wells are placed in the oil-rich regions and both simultaneous and sequential algorithms are tried to obtain their optimal locations and completions. The performances of simultaneous joint optimization and sequential joint optimization are compared and as a result it is recommended to use sequential joint optimization as the optimization algorithm in the integrated framework.https://www.frontiersin.org/articles/10.3389/fenrg.2022.1005749/fullmature oilfieldssecondary developmentinfill wellswell placement optimizationsimultaneous perturbation stochastic approximation (SPSA) |
| spellingShingle | Congcong Li Chaoqiang Fang Yougen Huang Hailong Zuo Zhang Zhang Shuoliang Wang Infill well placement optimization for secondary development of waterflooding oilfields with SPSA algorithm Frontiers in Energy Research mature oilfields secondary development infill wells well placement optimization simultaneous perturbation stochastic approximation (SPSA) |
| title | Infill well placement optimization for secondary development of waterflooding oilfields with SPSA algorithm |
| title_full | Infill well placement optimization for secondary development of waterflooding oilfields with SPSA algorithm |
| title_fullStr | Infill well placement optimization for secondary development of waterflooding oilfields with SPSA algorithm |
| title_full_unstemmed | Infill well placement optimization for secondary development of waterflooding oilfields with SPSA algorithm |
| title_short | Infill well placement optimization for secondary development of waterflooding oilfields with SPSA algorithm |
| title_sort | infill well placement optimization for secondary development of waterflooding oilfields with spsa algorithm |
| topic | mature oilfields secondary development infill wells well placement optimization simultaneous perturbation stochastic approximation (SPSA) |
| url | https://www.frontiersin.org/articles/10.3389/fenrg.2022.1005749/full |
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