Application of facies-controlled prestack geostatistical inversion in reservoir prediction: A case study of tight sandstone reservoir in the second member of Xujiahe Formation in western Sichuan Depression, Sichuan Basin
The second member of Xujiahe Formation in Gaomiaozi Gas Field, located in Xinchang fault zone of western Sichuan Depression, Sichuan Basin, is a typical tight sandstone gas reservoir with multiple layers of superimposed sand bodies. The sand bodies exhibit clear transverse phase transitions, charact...
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Editorial Department of Petroleum Reservoir Evaluation and Development
2024-08-01
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| Series: | Youqicang pingjia yu kaifa |
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| Online Access: | https://red.magtech.org.cn/fileup/2095-1426/PDF/1725929321417-1225782505.pdf |
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| author | LAI Weirong,YANG Guopeng,SONG Peidong,ZHANG Shunli,WANG Zheng |
| author_facet | LAI Weirong,YANG Guopeng,SONG Peidong,ZHANG Shunli,WANG Zheng |
| author_sort | LAI Weirong,YANG Guopeng,SONG Peidong,ZHANG Shunli,WANG Zheng |
| collection | DOAJ |
| description | The second member of Xujiahe Formation in Gaomiaozi Gas Field, located in Xinchang fault zone of western Sichuan Depression, Sichuan Basin, is a typical tight sandstone gas reservoir with multiple layers of superimposed sand bodies. The sand bodies exhibit clear transverse phase transitions, characterized as “overall sand rich, locally gas rich”. However, due to the impedance of the high-quality reservoir being similar to that of mudstone, traditional post-stack inversion methods struggle to accurately delineate the boundaries of the sand body and the distribution of high-quality reservoir zones.To address these challenges, the study initially focused on identifying and predicting the boundary of the favorable facies zones based on the geological characteristics of the second member of Xujiahe Formation. This was complemented by an analysis of sensitive petrophysical parameters. Subsequently, a pre-stack geostatistical inversion study was conducted under phase control constraints. This approach enabled the differentiation between effective reservoirs and mudstone, culminating in an accurate prediction of phase-controlled effective reservoirs. The results of this predictive technology not only enhanced the accuracy of identifying sand bodies but also improved the reliability of predicting effective reservoirs. The outcomes closely matched the actual drilling results. This prediction technology has significantly supported the reserve submission and the strategic deployment of exploration well locations in the Hexingchang gas field, yielding substantial oil and gas benefits. |
| format | Article |
| id | doaj-art-e714657e0fc0451ab75506ff2e51485c |
| institution | DOAJ |
| issn | 2095-1426 |
| language | zho |
| publishDate | 2024-08-01 |
| publisher | Editorial Department of Petroleum Reservoir Evaluation and Development |
| record_format | Article |
| series | Youqicang pingjia yu kaifa |
| spelling | doaj-art-e714657e0fc0451ab75506ff2e51485c2025-08-20T03:19:18ZzhoEditorial Department of Petroleum Reservoir Evaluation and DevelopmentYouqicang pingjia yu kaifa2095-14262024-08-0114458659210.13809/j.cnki.cn32-1825/te.2024.04.008Application of facies-controlled prestack geostatistical inversion in reservoir prediction: A case study of tight sandstone reservoir in the second member of Xujiahe Formation in western Sichuan Depression, Sichuan BasinLAI Weirong,YANG Guopeng,SONG Peidong,ZHANG Shunli,WANG Zheng0Research Institute of Exploration and Development, Sinopec Southwest China Oil & Gas Company, Chengdu, Sichuan 610041, ChinaThe second member of Xujiahe Formation in Gaomiaozi Gas Field, located in Xinchang fault zone of western Sichuan Depression, Sichuan Basin, is a typical tight sandstone gas reservoir with multiple layers of superimposed sand bodies. The sand bodies exhibit clear transverse phase transitions, characterized as “overall sand rich, locally gas rich”. However, due to the impedance of the high-quality reservoir being similar to that of mudstone, traditional post-stack inversion methods struggle to accurately delineate the boundaries of the sand body and the distribution of high-quality reservoir zones.To address these challenges, the study initially focused on identifying and predicting the boundary of the favorable facies zones based on the geological characteristics of the second member of Xujiahe Formation. This was complemented by an analysis of sensitive petrophysical parameters. Subsequently, a pre-stack geostatistical inversion study was conducted under phase control constraints. This approach enabled the differentiation between effective reservoirs and mudstone, culminating in an accurate prediction of phase-controlled effective reservoirs. The results of this predictive technology not only enhanced the accuracy of identifying sand bodies but also improved the reliability of predicting effective reservoirs. The outcomes closely matched the actual drilling results. This prediction technology has significantly supported the reserve submission and the strategic deployment of exploration well locations in the Hexingchang gas field, yielding substantial oil and gas benefits.https://red.magtech.org.cn/fileup/2095-1426/PDF/1725929321417-1225782505.pdf|tight sandstone|seismic facies|sensitive parameter|prestack geostatistical inversion|effective reservoir prediction |
| spellingShingle | LAI Weirong,YANG Guopeng,SONG Peidong,ZHANG Shunli,WANG Zheng Application of facies-controlled prestack geostatistical inversion in reservoir prediction: A case study of tight sandstone reservoir in the second member of Xujiahe Formation in western Sichuan Depression, Sichuan Basin Youqicang pingjia yu kaifa |tight sandstone|seismic facies|sensitive parameter|prestack geostatistical inversion|effective reservoir prediction |
| title | Application of facies-controlled prestack geostatistical inversion in reservoir prediction: A case study of tight sandstone reservoir in the second member of Xujiahe Formation in western Sichuan Depression, Sichuan Basin |
| title_full | Application of facies-controlled prestack geostatistical inversion in reservoir prediction: A case study of tight sandstone reservoir in the second member of Xujiahe Formation in western Sichuan Depression, Sichuan Basin |
| title_fullStr | Application of facies-controlled prestack geostatistical inversion in reservoir prediction: A case study of tight sandstone reservoir in the second member of Xujiahe Formation in western Sichuan Depression, Sichuan Basin |
| title_full_unstemmed | Application of facies-controlled prestack geostatistical inversion in reservoir prediction: A case study of tight sandstone reservoir in the second member of Xujiahe Formation in western Sichuan Depression, Sichuan Basin |
| title_short | Application of facies-controlled prestack geostatistical inversion in reservoir prediction: A case study of tight sandstone reservoir in the second member of Xujiahe Formation in western Sichuan Depression, Sichuan Basin |
| title_sort | application of facies controlled prestack geostatistical inversion in reservoir prediction a case study of tight sandstone reservoir in the second member of xujiahe formation in western sichuan depression sichuan basin |
| topic | |tight sandstone|seismic facies|sensitive parameter|prestack geostatistical inversion|effective reservoir prediction |
| url | https://red.magtech.org.cn/fileup/2095-1426/PDF/1725929321417-1225782505.pdf |
| work_keys_str_mv | AT laiweirongyangguopengsongpeidongzhangshunliwangzheng applicationoffaciescontrolledprestackgeostatisticalinversioninreservoirpredictionacasestudyoftightsandstonereservoirinthesecondmemberofxujiaheformationinwesternsichuandepressionsichuanbasin |