水平井分段多簇压裂模拟分析
Numerical Simulation of the Multi-Stage Fracturing in a Horizontal Well
摘要: 在致密油气资源开采时，水平井分段多簇压裂技术已经成为储层改造的关键技术。但现场生产测试结果表明簇间距较小时，缝间应力干扰将影响多条裂缝的均匀发育。针对缝间应力干扰使各簇射孔产生的裂缝流量分配不均导致多条裂缝发育不均衡的问题，基于CZM模型与伯努利方程建立了考虑射孔孔眼摩阻的三维多裂缝同时起裂延伸数值模型。模拟结果表明，射孔孔眼摩阻存在一个阀值，当超过阀值后能够有效削弱缝间应力干扰的影响，有助于流量均匀分配给各簇裂缝，提高储层改造效果。
Abstract: In the exploitation of tight oil and gas resources, multiple-fracture treatments in horizontal wellbores have become a key technology for reservoir reconstruction. However, according to the field production test results, when the cluster spacing is small, the stress-shadow will affect the uniform growths of multiple hydraulic fractures. Aiming at the problem of uneven partitioning of flow rate into each fracture generated by each cluster perforating caused by the stress-shadow, the development of multiple fractures is unbalanced. Based on the cohesive zone model (CZM) and Bernoulli’s equation, a three-dimensional multi-fracture simultaneous initiation considering the perforation friction is established. The simulation results show that there is a threshold for perforation friction. When exceeding the threshold, the influence of stress-shadow can be effectively weakened, which helps to distribute the flow evenly to each cluster of fractures and improve the effect of reservoir reconstruction.
文章引用：焦子曦, 杨洋. 水平井分段多簇压裂模拟分析[J]. 石油天然气学报, 2021, 43(3): 221-231. https://doi.org/10.12677/JOGT.2021.433054

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