Stress Sensitivity of Proppant-Containing Fractures and Its Influence on Gas Well Productivity
Formation pressure gradually decreases with fracturing fluid flowback and gas production. Due to the stress sensitivity of the fractures, the permeability of the artificial fractures after fracturing becomes lower, which significantly affects gas well productivity. This paper focuses on two question...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2023-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2023/8851149 |
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| _version_ | 1849699845392039936 |
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| author | Hao Chen Jianfei Wei Hanlie Cheng Qiang Qin Ying Chen Linqiang Zhang |
| author_facet | Hao Chen Jianfei Wei Hanlie Cheng Qiang Qin Ying Chen Linqiang Zhang |
| author_sort | Hao Chen |
| collection | DOAJ |
| description | Formation pressure gradually decreases with fracturing fluid flowback and gas production. Due to the stress sensitivity of the fractures, the permeability of the artificial fractures after fracturing becomes lower, which significantly affects gas well productivity. This paper focuses on two questions: (1) the stress sensitivity of proppant-containing fractures with different roughness and (2) tight gas well productivity considering stress sensitivity. Two types of artificial fracture samples, smooth and rough, are prepared and filled with different proppant concentrations. Then, the changing confining pressure method is used to quantify sample stress sensitivity. On this basis, the productivity equation for the fractured well with finite conductivity that considers fracture and matrix stress sensitivity is derived, and the influence of stress sensitivity on productivity is discussed. The results show that proppant concentration and fracture surface roughness will significantly affect fracture permeability and stress sensitivity; with increasing proppant concentration, fracture permeability increases, stress sensitivity decreases, and well productivity increases; under the same proppant concentration, the stress sensitivity is lower and the gas production is higher for smooth fracture; and when the artificial fracture changes from no proppant to proppant, the productivity of the fracturing well is improved the most. |
| format | Article |
| id | doaj-art-38cfee4ad9bd4cecaf208186722edb99 |
| institution | DOAJ |
| issn | 1468-8123 |
| language | English |
| publishDate | 2023-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-38cfee4ad9bd4cecaf208186722edb992025-08-20T03:18:27ZengWileyGeofluids1468-81232023-01-01202310.1155/2023/8851149Stress Sensitivity of Proppant-Containing Fractures and Its Influence on Gas Well ProductivityHao Chen0Jianfei Wei1Hanlie Cheng2Qiang Qin3Ying Chen4Linqiang Zhang5COSL-EXPRO Testing Services (Tianjin) Co.COSL-EXPRO Testing Services (Tianjin) Co.COSL-EXPRO Testing Services (Tianjin) Co.COSL-EXPRO Testing Services (Tianjin) Co.Engineering CompanyChina United Coalbed Methane Co.Formation pressure gradually decreases with fracturing fluid flowback and gas production. Due to the stress sensitivity of the fractures, the permeability of the artificial fractures after fracturing becomes lower, which significantly affects gas well productivity. This paper focuses on two questions: (1) the stress sensitivity of proppant-containing fractures with different roughness and (2) tight gas well productivity considering stress sensitivity. Two types of artificial fracture samples, smooth and rough, are prepared and filled with different proppant concentrations. Then, the changing confining pressure method is used to quantify sample stress sensitivity. On this basis, the productivity equation for the fractured well with finite conductivity that considers fracture and matrix stress sensitivity is derived, and the influence of stress sensitivity on productivity is discussed. The results show that proppant concentration and fracture surface roughness will significantly affect fracture permeability and stress sensitivity; with increasing proppant concentration, fracture permeability increases, stress sensitivity decreases, and well productivity increases; under the same proppant concentration, the stress sensitivity is lower and the gas production is higher for smooth fracture; and when the artificial fracture changes from no proppant to proppant, the productivity of the fracturing well is improved the most.http://dx.doi.org/10.1155/2023/8851149 |
| spellingShingle | Hao Chen Jianfei Wei Hanlie Cheng Qiang Qin Ying Chen Linqiang Zhang Stress Sensitivity of Proppant-Containing Fractures and Its Influence on Gas Well Productivity Geofluids |
| title | Stress Sensitivity of Proppant-Containing Fractures and Its Influence on Gas Well Productivity |
| title_full | Stress Sensitivity of Proppant-Containing Fractures and Its Influence on Gas Well Productivity |
| title_fullStr | Stress Sensitivity of Proppant-Containing Fractures and Its Influence on Gas Well Productivity |
| title_full_unstemmed | Stress Sensitivity of Proppant-Containing Fractures and Its Influence on Gas Well Productivity |
| title_short | Stress Sensitivity of Proppant-Containing Fractures and Its Influence on Gas Well Productivity |
| title_sort | stress sensitivity of proppant containing fractures and its influence on gas well productivity |
| url | http://dx.doi.org/10.1155/2023/8851149 |
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