Tight gas charging and accumulation mechanisms and mathematical model
The gas-water distribution and production heterogeneity of tight gas reservoirs have been summarized from experimental and geological observations, but the charging and accumulation mechanisms have not been examined quantitatively by mathematical model. The tight gas charging and accumulation mechan...
| প্রধান লেখক: | , , , , , , , , , , , , , |
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| বিন্যাস: | প্রবন্ধ |
| ভাষা: | English |
| প্রকাশিত: |
KeAi Communications Co., Ltd.
2023-12-01
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| মালা: | Petroleum Exploration and Development |
| বিষয়গুলি: | |
| অনলাইন ব্যবহার করুন: | http://www.sciencedirect.com/science/article/pii/S1876380424604763 |
| _version_ | 1827578735072641024 |
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| author | Nengwu ZHOU Shuangfang LU Pengfei ZHANG Zizhi LIN Dianshi XIAO Jiamin LU Yingkang ZHU Yancheng LIU Liming LIN Min WANG Xinyu JIANG Yang LIU Ziyi WANG Wenbiao LI |
| author_facet | Nengwu ZHOU Shuangfang LU Pengfei ZHANG Zizhi LIN Dianshi XIAO Jiamin LU Yingkang ZHU Yancheng LIU Liming LIN Min WANG Xinyu JIANG Yang LIU Ziyi WANG Wenbiao LI |
| author_sort | Nengwu ZHOU |
| collection | DOAJ |
| description | The gas-water distribution and production heterogeneity of tight gas reservoirs have been summarized from experimental and geological observations, but the charging and accumulation mechanisms have not been examined quantitatively by mathematical model. The tight gas charging and accumulation mechanisms were revealed from a combination of physical simulation of nuclear magnetic resonance coupling displacement, numerical simulation considering material and mechanical equilibria, as well as actual geological observation. The results show that gas migrates into tight rocks to preferentially form a gas saturation stabilization zone near the source-reservoir interface. When the gas source is insufficient, gas saturation reduction zone and uncharged zone are formed in sequence from the source-reservoir interface. The better the source rock conditions with more gas expulsion volume and higher overpressure, the thicker the gas saturation stabilization and reduction zones, and the higher the overall gas saturation. When the source rock conditions are limited, the better the tight reservoir conditions with higher porosity and permeability as well as larger pore throat, the thinner the gas saturation stabilization and reduction zones, but the gas saturation is high. The sweet spot of tight gas is developed in the high-quality reservoir near the source rock, which often corresponds to the gas saturation stabilization zone. The numerical simulation results by mathematical model agree well with the physical simulation results by nuclear magnetic resonance coupling displacement, and reasonably explain the gas-water distribution and production pattern of deep reservoirs in the Xujiaweizi fault depression of the Songliao Basin and tight gas reservoirs in the Linxing–Huangfu area of the Ordos Basin. |
| first_indexed | 2024-03-08T21:50:39Z |
| format | Article |
| id | doaj.art-0d589a3a14b443b09a43c41eb15de023 |
| institution | Directory Open Access Journal |
| issn | 1876-3804 |
| language | English |
| last_indexed | 2024-03-08T21:50:39Z |
| publishDate | 2023-12-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Petroleum Exploration and Development |
| spelling | doaj.art-0d589a3a14b443b09a43c41eb15de0232023-12-20T07:34:03ZengKeAi Communications Co., Ltd.Petroleum Exploration and Development1876-38042023-12-0150614111425Tight gas charging and accumulation mechanisms and mathematical modelNengwu ZHOU0Shuangfang LU1Pengfei ZHANG2Zizhi LIN3Dianshi XIAO4Jiamin LU5Yingkang ZHU6Yancheng LIU7Liming LIN8Min WANG9Xinyu JIANG10Yang LIU11Ziyi WANG12Wenbiao LI13Sanya Offshore Oil & Gas Research Institute, Northeast Petroleum University, Sanya 572025, China;; Key Laboratory of Continental Shale Hydrocarbon Accumulation and Efficient Development, Ministry of Education, Northeast Petroleum University, Daqing 163318, China;Sanya Offshore Oil & Gas Research Institute, Northeast Petroleum University, Sanya 572025, China;; Key Laboratory of Continental Shale Hydrocarbon Accumulation and Efficient Development, Ministry of Education, Northeast Petroleum University, Daqing 163318, China;; School of Geosciences, China University of Petroleum (East China), Qingdao 266580, China;; Corresponding author.College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China;School of Geosciences, China University of Petroleum (East China), Qingdao 266580, China;School of Geosciences, China University of Petroleum (East China), Qingdao 266580, China;Exploration and Development Research Institute, PetroChina Daqing Oilfield Company Limited, Daqing 163712, China;Exploration and Development Research Institute, PetroChina Daqing Oilfield Company Limited, Daqing 163712, China;China United Coalbed Methane Co., Ltd., Beijing 100083, ChinaChina United Coalbed Methane Co., Ltd., Beijing 100083, ChinaSchool of Geosciences, China University of Petroleum (East China), Qingdao 266580, China;School of Geosciences, China University of Petroleum (East China), Qingdao 266580, China;School of Geosciences, China University of Petroleum (East China), Qingdao 266580, China;School of Geosciences, China University of Petroleum (East China), Qingdao 266580, China;Sanya Offshore Oil & Gas Research Institute, Northeast Petroleum University, Sanya 572025, China;; Key Laboratory of Continental Shale Hydrocarbon Accumulation and Efficient Development, Ministry of Education, Northeast Petroleum University, Daqing 163318, China;The gas-water distribution and production heterogeneity of tight gas reservoirs have been summarized from experimental and geological observations, but the charging and accumulation mechanisms have not been examined quantitatively by mathematical model. The tight gas charging and accumulation mechanisms were revealed from a combination of physical simulation of nuclear magnetic resonance coupling displacement, numerical simulation considering material and mechanical equilibria, as well as actual geological observation. The results show that gas migrates into tight rocks to preferentially form a gas saturation stabilization zone near the source-reservoir interface. When the gas source is insufficient, gas saturation reduction zone and uncharged zone are formed in sequence from the source-reservoir interface. The better the source rock conditions with more gas expulsion volume and higher overpressure, the thicker the gas saturation stabilization and reduction zones, and the higher the overall gas saturation. When the source rock conditions are limited, the better the tight reservoir conditions with higher porosity and permeability as well as larger pore throat, the thinner the gas saturation stabilization and reduction zones, but the gas saturation is high. The sweet spot of tight gas is developed in the high-quality reservoir near the source rock, which often corresponds to the gas saturation stabilization zone. The numerical simulation results by mathematical model agree well with the physical simulation results by nuclear magnetic resonance coupling displacement, and reasonably explain the gas-water distribution and production pattern of deep reservoirs in the Xujiaweizi fault depression of the Songliao Basin and tight gas reservoirs in the Linxing–Huangfu area of the Ordos Basin.http://www.sciencedirect.com/science/article/pii/S1876380424604763tight gascharging and accumulation mechanismmathematical modelXujiaweizi fault depressionSongliao BasinLinxing–Huangfu area |
| spellingShingle | Nengwu ZHOU Shuangfang LU Pengfei ZHANG Zizhi LIN Dianshi XIAO Jiamin LU Yingkang ZHU Yancheng LIU Liming LIN Min WANG Xinyu JIANG Yang LIU Ziyi WANG Wenbiao LI Tight gas charging and accumulation mechanisms and mathematical model Petroleum Exploration and Development tight gas charging and accumulation mechanism mathematical model Xujiaweizi fault depression Songliao Basin Linxing–Huangfu area |
| title | Tight gas charging and accumulation mechanisms and mathematical model |
| title_full | Tight gas charging and accumulation mechanisms and mathematical model |
| title_fullStr | Tight gas charging and accumulation mechanisms and mathematical model |
| title_full_unstemmed | Tight gas charging and accumulation mechanisms and mathematical model |
| title_short | Tight gas charging and accumulation mechanisms and mathematical model |
| title_sort | tight gas charging and accumulation mechanisms and mathematical model |
| topic | tight gas charging and accumulation mechanism mathematical model Xujiaweizi fault depression Songliao Basin Linxing–Huangfu area |
| url | http://www.sciencedirect.com/science/article/pii/S1876380424604763 |
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