水平井分段多簇压裂模拟分析及射孔优化

发布时间：2018-01-06 02:30

本文关键词：水平井分段多簇压裂模拟分析及射孔优化　出处：《石油勘探与开发》2017年01期 　论文类型：期刊论文

【摘要】：针对缝间应力干扰造成的段内各裂缝非均匀延伸问题,建立综合考虑应力干扰、流固耦合、多裂缝流量分配的分段多簇压裂裂缝动态延伸数值模型。基于建立的数值模型,研究了射孔孔眼摩阻、射孔簇间距、储集层岩石弹性模量、压裂液黏度对多条水力裂缝延伸形态的影响。模拟结果表明,考虑射孔孔眼摩阻时裂缝发育较为均衡;随着簇间距缩小、岩石弹性模量或压裂液黏度增大,应力干扰增大,导致部分裂缝缝宽变窄而减少进液,加剧了段内各裂缝的非均匀延伸。合理的孔眼摩阻能够有效促进多裂缝均匀延伸,为此提出了简便的射孔孔眼摩阻优化计算方法。通过估算压裂过程中缝间诱导应力值,定量计算出维持压裂段内裂缝均匀延伸所需的孔眼摩擦系数,并以此优选合理的射孔工程参数。采用射孔摩阻优化方法对1口水平井射孔参数进行计算,数值模拟结果及现场压裂效果显示,优化后的射孔参数能够有效维持各裂缝均衡发育。
[Abstract]:According to the joint stress interference caused by the period of the non uniform crack extension, considering stress interference, fluid solid coupling, the segmented multi cluster fracture dynamic multi crack flow distribution extended numerical model. The numerical model is established based on the study of perforation friction, perforation cluster spacing, reservoir rock the elastic modulus and viscosity of fracturing fluid to extend influence on multiple forms of hydraulic fracture. The simulation results show that considering the perforation friction when the fracture is balanced; with the decrease of the distance between clusters, or increase the elastic modulus of rock fracturing fluid viscosity, stress interference increases, resulting in some cracks width narrows to reduce the liquid, exacerbated by the uniform the extension of crack period. Reasonable perforation friction can effectively promote the multiple cracks uniform extension is proposed in this paper, the optimized calculation method of perforation friction is simple. By estimating the fractured Cheng Zhongfeng trap The stress value, quantitative calculation of the friction coefficient of holes required to maintain uniform elongation in fracturing cracks, and then optimize the perforation engineering parameters. The perforation friction optimization method on the perforation of 1 horizontal wells parameters were calculated, the results of numerical simulation and field fracturing effect shows that the optimized parameters can effectively perforation maintain the balanced development of cracks.

【作者单位】：西南石油大学油气藏地质及开发工程国家重点实验室;中国石油西南油气田公司天然气经济研究所;
【基金】：国家自然科学基金重大项目“页岩地层动态随机裂缝控制机理与无水压裂理论”(51490653) 国家重点基础研究发展计划(973)项目“中国南方海相页岩气高效开发的基础研究”(2013CB228004)
【分类号】：TE357
【正文快照】： 引用:赵金洲,陈曦宇,李勇明,等.水平井分段多簇压裂模拟分析及射孔优化[J].石油勘探与开发,2017,44(1):117-124.ZHAO Jinzhou,CHEN Xiyu,LI Yongming,et al.Numerical simulation of multi-stage fracturing and optimization ofperforation in a horizontal well[J].Petroleu

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