Dynamic Reserve New Calculation Model for Fracture-Vuggy Reservoirs Considering the Effect of Dissolved Gas Precipitation
The internal spatial structure of fractured-karst reservoirs is complex, and the fluid distribution forms are diverse. The existence of water bodies and dissolved gases in the fracture-karst reservoir collective has a significant impact on dynamic reserves calculation. The material balance method of...
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| Format: | Article |
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Editorial Office of Well Logging Technology
2024-08-01
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| Series: | Cejing jishu |
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| Online Access: | https://www.cnpcwlt.com/#/digest?ArticleID=5625 |
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| author | WANG Hongpeng XIAO Yun LIU Chunlei YUE Ping QIN Hao GENG Chunying |
| author_facet | WANG Hongpeng XIAO Yun LIU Chunlei YUE Ping QIN Hao GENG Chunying |
| author_sort | WANG Hongpeng |
| collection | DOAJ |
| description | The internal spatial structure of fractured-karst reservoirs is complex, and the fluid distribution forms are diverse. The existence of water bodies and dissolved gases in the fracture-karst reservoir collective has a significant impact on dynamic reserves calculation. The material balance method of reservoir engineering does not consider the internal structure of the reservoir and the miscible state of oil and gas in the production process, and only calculates the reserves according to the change of reservoir pressure and the cumulative injection and production. Based on the conventional mass balance method of reservoir engineering, this paper introduces the parameters to characterize the energy of the water body, considers the influence of dissolved gas on reserves in reservoir development, corrects the comprehensive volume compressibility coefficient, and establishes a new model for dynamic reserve calculation, which makes up for the shortcomings of the existing calculation methods that do not fully consider the factors of comprehensive volume compressibility coefficient. The analysis of the example wells shows that compared with other dynamic reserve calculation models, the reservoir reserves gradually decrease with the increase of water energy. Under the same water energy, the dissolved gas is precipitated, the volume coefficient of crude oil becomes larger, and the reservoir reserves also decrease. The settlement results show that the model can more accurately characterize the actual situation of fractured-vuggy reservoir development, and provides a new method for calculating the reserves of this type of reservoir. |
| format | Article |
| id | doaj-art-c2628aaa46d04e4e934062a2a46c29c1 |
| institution | OA Journals |
| issn | 1004-1338 |
| language | zho |
| publishDate | 2024-08-01 |
| publisher | Editorial Office of Well Logging Technology |
| record_format | Article |
| series | Cejing jishu |
| spelling | doaj-art-c2628aaa46d04e4e934062a2a46c29c12025-08-20T02:33:23ZzhoEditorial Office of Well Logging TechnologyCejing jishu1004-13382024-08-0148452052610.16489/j.issn.1004-1338.2024.04.0121004-1338(2024)04-0520-07Dynamic Reserve New Calculation Model for Fracture-Vuggy Reservoirs Considering the Effect of Dissolved Gas PrecipitationWANG Hongpeng0XIAO Yun1LIU Chunlei2YUE Ping3QIN Hao4GENG Chunying5Geological Research Institute, China National Logging Corporation, Xi’an, Shaanxi 710077, ChinaDonghe Oil and Gas Production Management Area, Tarim Oilfield Company, PetroChina, Korla, Xinjiang 841000, ChinaGeological Research Institute, China National Logging Corporation, Xi’an, Shaanxi 710077, ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, ChinaGeological Research Institute, China National Logging Corporation, Xi’an, Shaanxi 710077, ChinaSinopec Northwest Oilfield Company, Urumchi, Xinjiang 830011, ChinaThe internal spatial structure of fractured-karst reservoirs is complex, and the fluid distribution forms are diverse. The existence of water bodies and dissolved gases in the fracture-karst reservoir collective has a significant impact on dynamic reserves calculation. The material balance method of reservoir engineering does not consider the internal structure of the reservoir and the miscible state of oil and gas in the production process, and only calculates the reserves according to the change of reservoir pressure and the cumulative injection and production. Based on the conventional mass balance method of reservoir engineering, this paper introduces the parameters to characterize the energy of the water body, considers the influence of dissolved gas on reserves in reservoir development, corrects the comprehensive volume compressibility coefficient, and establishes a new model for dynamic reserve calculation, which makes up for the shortcomings of the existing calculation methods that do not fully consider the factors of comprehensive volume compressibility coefficient. The analysis of the example wells shows that compared with other dynamic reserve calculation models, the reservoir reserves gradually decrease with the increase of water energy. Under the same water energy, the dissolved gas is precipitated, the volume coefficient of crude oil becomes larger, and the reservoir reserves also decrease. The settlement results show that the model can more accurately characterize the actual situation of fractured-vuggy reservoir development, and provides a new method for calculating the reserves of this type of reservoir.https://www.cnpcwlt.com/#/digest?ArticleID=5625material balance methodfracture-vuggy reservoirsdynamic reserve calculationdissolved gas |
| spellingShingle | WANG Hongpeng XIAO Yun LIU Chunlei YUE Ping QIN Hao GENG Chunying Dynamic Reserve New Calculation Model for Fracture-Vuggy Reservoirs Considering the Effect of Dissolved Gas Precipitation Cejing jishu material balance method fracture-vuggy reservoirs dynamic reserve calculation dissolved gas |
| title | Dynamic Reserve New Calculation Model for Fracture-Vuggy Reservoirs Considering the Effect of Dissolved Gas Precipitation |
| title_full | Dynamic Reserve New Calculation Model for Fracture-Vuggy Reservoirs Considering the Effect of Dissolved Gas Precipitation |
| title_fullStr | Dynamic Reserve New Calculation Model for Fracture-Vuggy Reservoirs Considering the Effect of Dissolved Gas Precipitation |
| title_full_unstemmed | Dynamic Reserve New Calculation Model for Fracture-Vuggy Reservoirs Considering the Effect of Dissolved Gas Precipitation |
| title_short | Dynamic Reserve New Calculation Model for Fracture-Vuggy Reservoirs Considering the Effect of Dissolved Gas Precipitation |
| title_sort | dynamic reserve new calculation model for fracture vuggy reservoirs considering the effect of dissolved gas precipitation |
| topic | material balance method fracture-vuggy reservoirs dynamic reserve calculation dissolved gas |
| url | https://www.cnpcwlt.com/#/digest?ArticleID=5625 |
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