A novel numerical simulation study on the flow mechanisms of deep low-permeability gas reservoirs
Abstract Due to the high pressure and low permeability, gas reservoirs in the East China Sea show significant reservoir stress sensitivity, non-linear flow characteristics. Meanwhile, relative permeabilities may change during the development. Conventional numerical simulation methods fails to charac...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-02-01
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| Series: | Journal of Petroleum Exploration and Production Technology |
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| Online Access: | https://doi.org/10.1007/s13202-024-01894-5 |
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| _version_ | 1850057438078697472 |
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| author | Ruidong Wu Chunguang Zhang Rui Wang Qinghao Sun Gangxiang Song Meixue Shi |
| author_facet | Ruidong Wu Chunguang Zhang Rui Wang Qinghao Sun Gangxiang Song Meixue Shi |
| author_sort | Ruidong Wu |
| collection | DOAJ |
| description | Abstract Due to the high pressure and low permeability, gas reservoirs in the East China Sea show significant reservoir stress sensitivity, non-linear flow characteristics. Meanwhile, relative permeabilities may change during the development. Conventional numerical simulation methods fails to characterize the impact of these complex flow mechanisms on the production. To this end, we quantitatively evaluate their influences and established a mathematical flow model of deep high-pressure low-permeability gas reservoirs. The mathematical model was discretized and linearized to obtain fully implicit solutions for pressure and saturation. The pre- and post-processing modules of the simulator were integrated with ECLIPSE. Based on parameter sensitivity analysis, the impact of these special flow mechanisms of deep low-permeability gas reservoirs on production were clarified through testing of the simulator. This novel model was applied in the S gas field in the East China Sea. The results showed that the stress sensitivity and differential pressure between the BHP and FP determined the stable production period and recovery. The BHP and the scope of the pressure decline decreased due to the non-linear flow behavior. Variations in gas-water relative permeabilities during the depletion lead to an increase in water production and a reduction in stable production period. The numerical simulation method improves the accuracy of production history match for low-permeability gas reservoirs, and agrees well with the real cases, providing a guidance for field development plans. |
| format | Article |
| id | doaj-art-6200dae36fd441db813faedea48b29fb |
| institution | DOAJ |
| issn | 2190-0558 2190-0566 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of Petroleum Exploration and Production Technology |
| spelling | doaj-art-6200dae36fd441db813faedea48b29fb2025-08-20T02:51:27ZengSpringerOpenJournal of Petroleum Exploration and Production Technology2190-05582190-05662025-02-0115311410.1007/s13202-024-01894-5A novel numerical simulation study on the flow mechanisms of deep low-permeability gas reservoirsRuidong Wu0Chunguang Zhang1Rui Wang2Qinghao Sun3Gangxiang Song4Meixue Shi5Shanghai Branch, CNOOC China LimitedShanghai Branch, CNOOC China LimitedShanghai Branch, CNOOC China LimitedGuizhou Wujiang Coalbed Methane Exploration and Development Co., Ltd.Shanghai Branch, CNOOC China LimitedShanghai Branch, CNOOC China LimitedAbstract Due to the high pressure and low permeability, gas reservoirs in the East China Sea show significant reservoir stress sensitivity, non-linear flow characteristics. Meanwhile, relative permeabilities may change during the development. Conventional numerical simulation methods fails to characterize the impact of these complex flow mechanisms on the production. To this end, we quantitatively evaluate their influences and established a mathematical flow model of deep high-pressure low-permeability gas reservoirs. The mathematical model was discretized and linearized to obtain fully implicit solutions for pressure and saturation. The pre- and post-processing modules of the simulator were integrated with ECLIPSE. Based on parameter sensitivity analysis, the impact of these special flow mechanisms of deep low-permeability gas reservoirs on production were clarified through testing of the simulator. This novel model was applied in the S gas field in the East China Sea. The results showed that the stress sensitivity and differential pressure between the BHP and FP determined the stable production period and recovery. The BHP and the scope of the pressure decline decreased due to the non-linear flow behavior. Variations in gas-water relative permeabilities during the depletion lead to an increase in water production and a reduction in stable production period. The numerical simulation method improves the accuracy of production history match for low-permeability gas reservoirs, and agrees well with the real cases, providing a guidance for field development plans.https://doi.org/10.1007/s13202-024-01894-5High pressureLow-permeability gas reservoirsStress sensitivityNon-linear flowRelative permeability variationNumerical simulation |
| spellingShingle | Ruidong Wu Chunguang Zhang Rui Wang Qinghao Sun Gangxiang Song Meixue Shi A novel numerical simulation study on the flow mechanisms of deep low-permeability gas reservoirs Journal of Petroleum Exploration and Production Technology High pressure Low-permeability gas reservoirs Stress sensitivity Non-linear flow Relative permeability variation Numerical simulation |
| title | A novel numerical simulation study on the flow mechanisms of deep low-permeability gas reservoirs |
| title_full | A novel numerical simulation study on the flow mechanisms of deep low-permeability gas reservoirs |
| title_fullStr | A novel numerical simulation study on the flow mechanisms of deep low-permeability gas reservoirs |
| title_full_unstemmed | A novel numerical simulation study on the flow mechanisms of deep low-permeability gas reservoirs |
| title_short | A novel numerical simulation study on the flow mechanisms of deep low-permeability gas reservoirs |
| title_sort | novel numerical simulation study on the flow mechanisms of deep low permeability gas reservoirs |
| topic | High pressure Low-permeability gas reservoirs Stress sensitivity Non-linear flow Relative permeability variation Numerical simulation |
| url | https://doi.org/10.1007/s13202-024-01894-5 |
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