摘要
射孔完井是沟通储层与井筒的重要手段,而射孔过程中必然造成套管损伤。通过对射孔参数优化,进而实现套管损伤的最小化,对于实现油气井稳定生产具有重要意义。采用数值仿真的方式,明确射孔中射流杵对套管造成损伤的过程,通过优化射孔孔密、射孔相位角等射孔参数实现套管损伤的最小化。研究结果表明:聚能射孔过程中,金属射流造成套管直接损伤,而相邻射孔弹间金属射流侵彻套管产生的应力,以射孔为中心以环状分布的特征向外扩展,相邻射孔弹间的应力出现叠加造成这部分套管损伤;通过开展射孔孔密区间为10~23孔/m的动力学数值计算后,考虑射孔弹间应力叠加现象,对射孔孔密进行优选,优化后的射孔孔密为16孔/m;通过开展射孔相位角区间为0°~75°的动力学数值计算后,考虑射孔弹间应力叠加现象,对射孔相位角进行优选,优化后的射孔相位角为45°。研究结果对于射孔完井中射孔参数的设计、优选具有指导与借鉴意义。
Perforation completion is an important means to communicate between reservoir and wellbore,and casing damage is inevitable in the process of perforation.Through the optimization of perforation parameters,casing damage can be minimized,which is of great significance to realize the stable production of oil and gas wells.By means of numerical simulation,the process of casing damage caused by jet pestle in perforation is clarified,and the casing damage is minimized by optimizing perforation parameters such as perforation density and perforation phase angle.The results show that in the process of shaped charge perforation,the metal jet causes direct damage to the casing,while the stress generated by the metal jet penetrating the casing between adjacent perforations extends outward with the characteristics of annular distribution centered on the perforation,and the stress between adjacent perforations is superimposed,resulting in this part of casing damage.Through the dynamic numerical calculation of perforation density interval of 10~23 holes/m,considering the stress superposition between perforations,the perforation density is optimized,and the optimized perforation density is 16 holes/m.After the dynamic numerical calculation of perforation phase angle interval of 0°~75°,considering the stress superposition between perforations,the perforation phase angle is optimized,and the optimized perforation phase angle is 45°.The research results of this paper have guiding and reference significance for the design and optimization of perforation parameters in perforation completion.
作者
慈建发
刘献博
李军
杨宏伟
柳贡慧
文涛
CI Jianfa;LIU Xianbo;LI Jun;YANG Hongwei;LIU Gonghui;WEN Tao(Petroleum Engineering Technology Research Institute of Sinopec Southwest Oil and Gas Company,Deyang,Sichuan 618000,China;China University of Petroleum(Beijing),Beijing 102249,China;China University of Petroleum(Beijing)at Karamay,Karamay,Xinjiang 834000,China;PetroChina Tarim Oilfield Company,Korla,Xinjiang 841000,China)
出处
《石油管材与仪器》
2022年第2期19-22,共4页
Petroleum Tubular Goods & Instruments
基金
国家自然科学基金企业创新发展联合基金项目“海相深层高温高压钻完井工程基础理论及控制方法”(编号:U19B6003-05)
中国石油化工股份有限公司西南油气分公司横向委托课题“威荣深层页岩气井套管变形预防与控制关键技术研究”(编号:34450000-20-ZC0607-0006)
国家自然基金(联合基金重点项目)“页岩气水平井井筒完整性失效机理与控制方法研究”(编号:U1762211)。
关键词
射孔
套管损伤
射孔参数
优化研究
perforation
casing damage
perforation parameters
optimization research
