Inter-well interference and well spacing optimization for shale gas reservoirs
Design and optimization of well spacing is a key indicator for evaluating the development effect of shale gas reservoirs. On the basis of theoretical understanding, and after the verification by analogy, numerical simulation, and economic evaluation, a complete workflow from inter-well interference...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2021-10-01
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| Series: | Journal of Natural Gas Geoscience |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2468256X21000523 |
| _version_ | 1797760625268490240 |
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| author | Jingyuan Chen Yunsheng Wei Junlei Wang Wei Yu Yadong Qi Jianfa Wu Wanjing Luo |
| author_facet | Jingyuan Chen Yunsheng Wei Junlei Wang Wei Yu Yadong Qi Jianfa Wu Wanjing Luo |
| author_sort | Jingyuan Chen |
| collection | DOAJ |
| description | Design and optimization of well spacing is a key indicator for evaluating the development effect of shale gas reservoirs. On the basis of theoretical understanding, and after the verification by analogy, numerical simulation, and economic evaluation, a complete workflow from inter-well interference simulation and dynamic data diagnosis to multi-well production simulation and well spacing optimization was formed. First, a pressure detection boundary propagation model is established to simulate the response degree of inter-well interference under different connected conditions. Second, inter-well interference is identified and diagnosed depending on the inter-well interference response behaviors and the interpretation of performance data from gas wells. Third, taking the geological interpretation and dynamic analysis results as basic parameters, a multi-well numerical model for volume fracturing in gas reservoirs is established to simulate the production performance of gas field, and then well spacing is optimized in combination with the net present value model. The application in the Ning 201 well block in the Changning National Shale Gas Demonstration Area has shown that a smaller well spacing can allow a premature inter-well interference and also the enhancement of recovery in the entire block. Given the current fracturing scale and parameter system, the well spacing of 300–400 m can be optimized to 260–320 m, that is, the number of wells per unit area increases by 20%–30%. As a result, the recovery percent of reserves in the block increase by about 10%. The net present value of the block rises, but the corresponding optimal well spacing does not change, with the production period. |
| first_indexed | 2024-03-12T19:01:15Z |
| format | Article |
| id | doaj.art-684da3410283467db741ed536e85f9c9 |
| institution | Directory Open Access Journal |
| issn | 2468-256X |
| language | English |
| last_indexed | 2024-03-12T19:01:15Z |
| publishDate | 2021-10-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Natural Gas Geoscience |
| spelling | doaj.art-684da3410283467db741ed536e85f9c92023-08-02T06:36:04ZengKeAi Communications Co., Ltd.Journal of Natural Gas Geoscience2468-256X2021-10-0165301312Inter-well interference and well spacing optimization for shale gas reservoirsJingyuan Chen0Yunsheng Wei1Junlei Wang2Wei Yu3Yadong Qi4Jianfa Wu5Wanjing Luo6PetroChina Southwest Oil and Gas Field Company, Chengdu, 610051, ChinaPetroChina Research Institute of Petroleum Exploration and Development, Beijing, 100083, China; Corresponding author.PetroChina Research Institute of Petroleum Exploration and Development, Beijing, 100083, ChinaDepartment of Petroleum Geology Engineering, University of Texas at Austin, Austin, 78712, USAPetroChina Research Institute of Petroleum Exploration and Development, Beijing, 100083, ChinaPetroChina Southwest Oil and Gas Field Company, Chengdu, 610051, ChinaSchool of Energy, China University of Geosciences (Beijing), Beijing, 100083, ChinaDesign and optimization of well spacing is a key indicator for evaluating the development effect of shale gas reservoirs. On the basis of theoretical understanding, and after the verification by analogy, numerical simulation, and economic evaluation, a complete workflow from inter-well interference simulation and dynamic data diagnosis to multi-well production simulation and well spacing optimization was formed. First, a pressure detection boundary propagation model is established to simulate the response degree of inter-well interference under different connected conditions. Second, inter-well interference is identified and diagnosed depending on the inter-well interference response behaviors and the interpretation of performance data from gas wells. Third, taking the geological interpretation and dynamic analysis results as basic parameters, a multi-well numerical model for volume fracturing in gas reservoirs is established to simulate the production performance of gas field, and then well spacing is optimized in combination with the net present value model. The application in the Ning 201 well block in the Changning National Shale Gas Demonstration Area has shown that a smaller well spacing can allow a premature inter-well interference and also the enhancement of recovery in the entire block. Given the current fracturing scale and parameter system, the well spacing of 300–400 m can be optimized to 260–320 m, that is, the number of wells per unit area increases by 20%–30%. As a result, the recovery percent of reserves in the block increase by about 10%. The net present value of the block rises, but the corresponding optimal well spacing does not change, with the production period.http://www.sciencedirect.com/science/article/pii/S2468256X21000523Staged fractured horizontal wellFracture connectionInter-well interferenceWell spacing optimizationNet present value model |
| spellingShingle | Jingyuan Chen Yunsheng Wei Junlei Wang Wei Yu Yadong Qi Jianfa Wu Wanjing Luo Inter-well interference and well spacing optimization for shale gas reservoirs Journal of Natural Gas Geoscience Staged fractured horizontal well Fracture connection Inter-well interference Well spacing optimization Net present value model |
| title | Inter-well interference and well spacing optimization for shale gas reservoirs |
| title_full | Inter-well interference and well spacing optimization for shale gas reservoirs |
| title_fullStr | Inter-well interference and well spacing optimization for shale gas reservoirs |
| title_full_unstemmed | Inter-well interference and well spacing optimization for shale gas reservoirs |
| title_short | Inter-well interference and well spacing optimization for shale gas reservoirs |
| title_sort | inter well interference and well spacing optimization for shale gas reservoirs |
| topic | Staged fractured horizontal well Fracture connection Inter-well interference Well spacing optimization Net present value model |
| url | http://www.sciencedirect.com/science/article/pii/S2468256X21000523 |
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