西南石油大学石油与天然气工程学院
卞小强,教授,生于1979年,2011年毕业于西南石油大学油气田开发工程专业,现从事气田开发理论与方法研究工作。地址:(610500)四川省成都市。email:xiaoqiang.bian@swpu.edu.cn。
收稿:2025-01-08,
修回:2025-04-29,
纸质出版:2025-10-10
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卞小强,张纪龙.页岩气水平井脉动水力压裂地应力场扰动机理[J].石油机械,2025,53(10):56-63.
Bian Xiaoqiang,Zhang Jilong.Mechanism of in-situ stress field disturbance induced by pulsating hydraulic fracturing in shale gas horizontal wells[J].China Petroleum Machinery,2025,53(10):56-63.
卞小强,张纪龙.页岩气水平井脉动水力压裂地应力场扰动机理[J].石油机械,2025,53(10):56-63. DOI: 10.12473/CPM.202501016.
Bian Xiaoqiang,Zhang Jilong.Mechanism of in-situ stress field disturbance induced by pulsating hydraulic fracturing in shale gas horizontal wells[J].China Petroleum Machinery,2025,53(10):56-63. DOI: 10.12473/CPM.202501016.
为进一步增强脉动水力压裂技术的作业效果,构建了适用于脉动水力压裂应力干扰模拟的数学模型,并将模型的应力模拟结果与COMSOL软件的模拟结果进行了横向对比。将数学模型转化为程序语言,对COMSOL软件进行二次开发,针对不同的主应力值与泊松比值,模拟分析了脉动水力压裂对地应力场所产生的应力干扰特征。研究结果表明:地应力场的最大与最小水平主应力每增加约1.00 MPa,应力干扰范围会随之缩小,且脉动水力压裂对地应力场所产生的最大切应力约分别下降0.29、0.49 MPa;页岩的泊松比每增加约0.01,脉动水力压裂对地应力场所产生的最大切应力约增加0.58 MPa,且应力干扰范围也呈逐步扩大之势。所得结论可为页岩气水平井脉动水力压裂的高效施工提供理论支撑。
To further improve the performance of pulsating hydraulic fracturing technology, a mathematical model suitable for the simulation of stress interference of pulsating hydraulic fracturing was constructed, and the stress simulation results of the model were compared with the simulation results of COMSOL software. The mathematical model was transformed into a programming language to conduct secondary development on COMSOL, and the stress interference characteristics of pulsating hydraulic fracturing on the in-situ stress field were simulated and analyzed under varying principal stress magnitudes and Poisson's ratios. The study results show that for every approximate 1.00 MPa increase in the maximum and minimum horizontal principal stresses within the in-situ stress field, the stress interference range decreases correspondingly, and the maximum shear stress generated by pulsating hydraulic fracturing on the in-situ stress field decreases by approximately 0.29 MPa and 0.49 MPa respectively. For every approximate 0.01 increase in the Poisson's ratio of shale, the maximum shear stress generated by pulsating hydraulic fracturing on the in-situ stress field increases by about 0.58 MPa, and the stress interference range also gradually expands. The conclusions provide theoretical support for the efficient operation of pulsating hydraulic fracturing in shale gas horizontal wells.
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