定面射孔套管结构动态响应分析及应用  

Analysis and Application of Casing Structural Strength Response of Transverse Perforation

作　　者：唐凯 陈建波 张清彬 马峰[2] 杨登波 

机构地区：[1]中国石油集团川庆钻探工程有限公司测井公司,重庆400021 [2]北京理工大学,北京100081

出　　处：《测井技术》2017年第4期485-489,共5页Well Logging Technology

基　　金：国家重大专项大型油气田及煤层气开发储层改造新工艺;新技术(2016ZX05023-005)

摘　　要：定面射孔技术采用特殊的布弹方式,能在垂直于套管轴向同一横截面上形成多个射孔孔眼,改变井筒内同一横截面的井周地应力分布,制造射孔孔眼应力集中。它在造成地层应力集中和控制裂缝走向的同时也造成了套管局部应力集中,降低了套管的剩余强度。以解决定面射孔套管剩余强度评价和保障后续作业安全为目的,采用静力学分析、动力学响应仿真和试验测试相结合的方法,对定面射孔套管剩余强度综合分析研究,提出了以最大危险区域应力分布为依据的套管静力学剩余强度表达方法和以套管塑性应变区域体积与分布的套管结构剩余强度动力学响应表达方法,得到了不同参数下定面射孔的套管剩余强度。该技术的试验和应用为保障套管及井筒安全、大规模推广应用定面射孔技术奠定了坚实基础。Transverse perforation is a technology that can change near well bore formation stress distribution by perforating several tunnels on one transverse plane perpendicular to casing axis, utilizing special placement of shaped charges.It can lead to stress concentration on perforating tunnels.While formation stress concentrates and direction of fracture is controlled, it also leads to reduction of some part of casing＆#39;s strength.Illustrated is a combination method of static analysis, dynamic response analysis and experiment to evaluate the remaining casing strength after transverse perforation.With evaluation of remaining casing strength, safety of follow-up operations can be assured.Based on maximum stress distribution of danger area, two presenting methods of remaining strength are established, one uses static force remaining strength, the other uses dynamic response of casing plastic deformation volume.This methodology is a foundation for casing and well bore safety and massive application of transverse perforation.

关 键 词：定面射孔 水力压裂 套管剩余强度 结构强度响应 金相分析 

分 类 号：P631.84[天文地球—地质矿产勘探] TE257.1[天文地球—地质学]