Geomechanical modeling of ultradeep fault‐controlled carbonate reservoirs and its application, a case of the Fuman Oilfield in Tarim Basin
Abstract To improve the development efficiency of ultradeep fault‐controlled carbonate reservoirs, the deformation and connectivity mechanism of fractures was revealed through large‐scale rock mechanical experiments. The in situ stress field and fracture activity distribution law of fault‐control ca...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2023-10-01
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| Series: | Energy Science & Engineering |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/ese3.1552 |
| _version_ | 1797644656743284736 |
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| author | Ke Xu Zhenzhong Cai Hui Zhang Guoqing Yin Zhimin Wang Lu Fang Haiying Wang Ziwei Qian Wei Zhang Shujun Lai Wei Zhao |
| author_facet | Ke Xu Zhenzhong Cai Hui Zhang Guoqing Yin Zhimin Wang Lu Fang Haiying Wang Ziwei Qian Wei Zhang Shujun Lai Wei Zhao |
| author_sort | Ke Xu |
| collection | DOAJ |
| description | Abstract To improve the development efficiency of ultradeep fault‐controlled carbonate reservoirs, the deformation and connectivity mechanism of fractures was revealed through large‐scale rock mechanical experiments. The in situ stress field and fracture activity distribution law of fault‐control carbonate reservoirs were clarified through geomechanical modeling. It is revealed that the fracture activity in different directions and the connectivity of the fracture and cavity in different parts are significantly different, the development effect of different well trajectories is analyzed, and the integrated working method of geological engineering is proposed to scientifically guide the well trajectory design and water injection scheme optimization. The results show that: (1) Large‐scale fractures and high‐angle fracture systems in the deformation of strike–slip faults are the key factors affecting reservoir quality. High‐pressure water injection can activate preexisting fractures, and it can extend on the basis of preexisting fractures, and even generate new fractures, which promote the interconnection of fault‐controlled fracture‐cave bodies in the vertical and horizontal directions. (2) During the process of high‐pressure water injection, the coupling change between mechanics and flow occurs inside the fracture body, the seepage environment is improved, and the oil and gas recovery factor is improved through cyclic lifting. (3) According to the shape and occurrence of the fault body and the dynamic shear deformation connectivity of the fault surface, the best well point and well trajectory of the directional well can be optimized, and the water injection scheme can be optimized. (4) The single‐well production increased by 1.45 × 104 t through high‐pressure water injection, the cumulative oil increase of the same fracture‐cavity body increased by 4.63 × 104 t. This method is highly efficient for ultradeep fault‐controlled oil reservoirs. The development provides a good theoretical basis and technical support, and plays a leading and exemplary role. |
| first_indexed | 2024-03-11T14:33:45Z |
| format | Article |
| id | doaj.art-de1446da86e94806b8d31f7856d2757c |
| institution | Directory Open Access Journal |
| issn | 2050-0505 |
| language | English |
| last_indexed | 2024-03-11T14:33:45Z |
| publishDate | 2023-10-01 |
| publisher | Wiley |
| record_format | Article |
| series | Energy Science & Engineering |
| spelling | doaj.art-de1446da86e94806b8d31f7856d2757c2023-10-31T06:46:02ZengWileyEnergy Science & Engineering2050-05052023-10-0111103332334310.1002/ese3.1552Geomechanical modeling of ultradeep fault‐controlled carbonate reservoirs and its application, a case of the Fuman Oilfield in Tarim BasinKe Xu0Zhenzhong Cai1Hui Zhang2Guoqing Yin3Zhimin Wang4Lu Fang5Haiying Wang6Ziwei Qian7Wei Zhang8Shujun Lai9Wei Zhao10PetroChina Tarim Oilfield Company Korla ChinaPetroChina Tarim Oilfield Company Korla ChinaPetroChina Tarim Oilfield Company Korla ChinaPetroChina Tarim Oilfield Company Korla ChinaPetroChina Tarim Oilfield Company Korla ChinaPetroChina Tarim Oilfield Company Korla ChinaPetroChina Tarim Oilfield Company Korla ChinaPetroChina Tarim Oilfield Company Korla ChinaPetroChina Tarim Oilfield Company Korla ChinaPetroChina Tarim Oilfield Company Korla ChinaPetroChina Tarim Oilfield Company Korla ChinaAbstract To improve the development efficiency of ultradeep fault‐controlled carbonate reservoirs, the deformation and connectivity mechanism of fractures was revealed through large‐scale rock mechanical experiments. The in situ stress field and fracture activity distribution law of fault‐control carbonate reservoirs were clarified through geomechanical modeling. It is revealed that the fracture activity in different directions and the connectivity of the fracture and cavity in different parts are significantly different, the development effect of different well trajectories is analyzed, and the integrated working method of geological engineering is proposed to scientifically guide the well trajectory design and water injection scheme optimization. The results show that: (1) Large‐scale fractures and high‐angle fracture systems in the deformation of strike–slip faults are the key factors affecting reservoir quality. High‐pressure water injection can activate preexisting fractures, and it can extend on the basis of preexisting fractures, and even generate new fractures, which promote the interconnection of fault‐controlled fracture‐cave bodies in the vertical and horizontal directions. (2) During the process of high‐pressure water injection, the coupling change between mechanics and flow occurs inside the fracture body, the seepage environment is improved, and the oil and gas recovery factor is improved through cyclic lifting. (3) According to the shape and occurrence of the fault body and the dynamic shear deformation connectivity of the fault surface, the best well point and well trajectory of the directional well can be optimized, and the water injection scheme can be optimized. (4) The single‐well production increased by 1.45 × 104 t through high‐pressure water injection, the cumulative oil increase of the same fracture‐cavity body increased by 4.63 × 104 t. This method is highly efficient for ultradeep fault‐controlled oil reservoirs. The development provides a good theoretical basis and technical support, and plays a leading and exemplary role.https://doi.org/10.1002/ese3.1552fault‐controlled carbonate reservoirfractured‐cavity bodygeomechanicsultradeep layerwater injection developmentwellbore trajectory |
| spellingShingle | Ke Xu Zhenzhong Cai Hui Zhang Guoqing Yin Zhimin Wang Lu Fang Haiying Wang Ziwei Qian Wei Zhang Shujun Lai Wei Zhao Geomechanical modeling of ultradeep fault‐controlled carbonate reservoirs and its application, a case of the Fuman Oilfield in Tarim Basin Energy Science & Engineering fault‐controlled carbonate reservoir fractured‐cavity body geomechanics ultradeep layer water injection development wellbore trajectory |
| title | Geomechanical modeling of ultradeep fault‐controlled carbonate reservoirs and its application, a case of the Fuman Oilfield in Tarim Basin |
| title_full | Geomechanical modeling of ultradeep fault‐controlled carbonate reservoirs and its application, a case of the Fuman Oilfield in Tarim Basin |
| title_fullStr | Geomechanical modeling of ultradeep fault‐controlled carbonate reservoirs and its application, a case of the Fuman Oilfield in Tarim Basin |
| title_full_unstemmed | Geomechanical modeling of ultradeep fault‐controlled carbonate reservoirs and its application, a case of the Fuman Oilfield in Tarim Basin |
| title_short | Geomechanical modeling of ultradeep fault‐controlled carbonate reservoirs and its application, a case of the Fuman Oilfield in Tarim Basin |
| title_sort | geomechanical modeling of ultradeep fault controlled carbonate reservoirs and its application a case of the fuman oilfield in tarim basin |
| topic | fault‐controlled carbonate reservoir fractured‐cavity body geomechanics ultradeep layer water injection development wellbore trajectory |
| url | https://doi.org/10.1002/ese3.1552 |
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