Experimental Study on Formation Slip under Injection-Production Interregional Pressure Difference Based on the Abnormal Similarity Theory
In oilfield development, the pore pressure difference between adjacent areas leads to cracks and slipping in the weak structural surface layer, which triggers the shear failure of the casing. The formation slip involves a large range of formation, and its amount is not proportional to the size of th...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2021/5536786 |
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| author | Chaoyang Hu Fengjiao Wang Tingting Wang Chi Ai Chenyu Wu |
| author_facet | Chaoyang Hu Fengjiao Wang Tingting Wang Chi Ai Chenyu Wu |
| author_sort | Chaoyang Hu |
| collection | DOAJ |
| description | In oilfield development, the pore pressure difference between adjacent areas leads to cracks and slipping in the weak structural surface layer, which triggers the shear failure of the casing. The formation slip involves a large range of formation, and its amount is not proportional to the size of the slipping rock mass, which conventional physical models cannot simulate. In this study, based on the abnormal similarity theory, we derived the similarity coefficients of mechanical parameters with different horizontal and vertical proportions. Furthermore, an experimental device for simulating the formation crack and slip under interregional formation pressure difference was developed. Through the experiments, we obtained slip conditions under different pressure differences between adjacent areas and different oil layers and fault surface depths. The study shows that the pore pressure difference between adjacent areas is the driving force of the formation slips. The slip zone is located in the middle of two abnormal pressure zones, and the distance between the adjacent areas can affect the slip range. The deep burial of the oil layer and shallow depth of the weak structural surface can trigger a more significant formation slip. The experimental method proposed in this paper provides an experimental device and method for understanding the formation of cracks and slips on weak structural surfaces. The experimental results provide a theoretical basis for the prevention of shear-type casing damage caused by formation slip. |
| format | Article |
| id | doaj-art-068ed9d6df404c699d608c3f0c8cd974 |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-068ed9d6df404c699d608c3f0c8cd9742025-02-03T06:10:46ZengWileyGeofluids1468-81151468-81232021-01-01202110.1155/2021/55367865536786Experimental Study on Formation Slip under Injection-Production Interregional Pressure Difference Based on the Abnormal Similarity TheoryChaoyang Hu0Fengjiao Wang1Tingting Wang2Chi Ai3Chenyu Wu4Laboratory of Enhanced Oil Recovery of Education Ministry, Northeast Petroleum University, Daqing, 163318 Heilongjiang, ChinaLaboratory of Enhanced Oil Recovery of Education Ministry, Northeast Petroleum University, Daqing, 163318 Heilongjiang, ChinaSchool of Electrical Engineering and Information, Northeast Petroleum University, Daqing, 163318 Heilongjiang, ChinaLaboratory of Enhanced Oil Recovery of Education Ministry, Northeast Petroleum University, Daqing, 163318 Heilongjiang, ChinaDaqing Oilfield Production Engineering Research Institute, Daqing, 163453 Heilongjiang, ChinaIn oilfield development, the pore pressure difference between adjacent areas leads to cracks and slipping in the weak structural surface layer, which triggers the shear failure of the casing. The formation slip involves a large range of formation, and its amount is not proportional to the size of the slipping rock mass, which conventional physical models cannot simulate. In this study, based on the abnormal similarity theory, we derived the similarity coefficients of mechanical parameters with different horizontal and vertical proportions. Furthermore, an experimental device for simulating the formation crack and slip under interregional formation pressure difference was developed. Through the experiments, we obtained slip conditions under different pressure differences between adjacent areas and different oil layers and fault surface depths. The study shows that the pore pressure difference between adjacent areas is the driving force of the formation slips. The slip zone is located in the middle of two abnormal pressure zones, and the distance between the adjacent areas can affect the slip range. The deep burial of the oil layer and shallow depth of the weak structural surface can trigger a more significant formation slip. The experimental method proposed in this paper provides an experimental device and method for understanding the formation of cracks and slips on weak structural surfaces. The experimental results provide a theoretical basis for the prevention of shear-type casing damage caused by formation slip.http://dx.doi.org/10.1155/2021/5536786 |
| spellingShingle | Chaoyang Hu Fengjiao Wang Tingting Wang Chi Ai Chenyu Wu Experimental Study on Formation Slip under Injection-Production Interregional Pressure Difference Based on the Abnormal Similarity Theory Geofluids |
| title | Experimental Study on Formation Slip under Injection-Production Interregional Pressure Difference Based on the Abnormal Similarity Theory |
| title_full | Experimental Study on Formation Slip under Injection-Production Interregional Pressure Difference Based on the Abnormal Similarity Theory |
| title_fullStr | Experimental Study on Formation Slip under Injection-Production Interregional Pressure Difference Based on the Abnormal Similarity Theory |
| title_full_unstemmed | Experimental Study on Formation Slip under Injection-Production Interregional Pressure Difference Based on the Abnormal Similarity Theory |
| title_short | Experimental Study on Formation Slip under Injection-Production Interregional Pressure Difference Based on the Abnormal Similarity Theory |
| title_sort | experimental study on formation slip under injection production interregional pressure difference based on the abnormal similarity theory |
| url | http://dx.doi.org/10.1155/2021/5536786 |
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