公山庙构造地应力实验与测井计算分析  

THE FORMATION STRESS EXPERIMENT OF GONGSHANGMIAO STRUCTURE AND WELL LOGGING CALCULATION ANALYSIS

作　　者：赵昊[1] 夏宏泉[1] 胡永东[2] 陈心宇[3] 

机构地区：[1]西南石油大学石油工程测井实验室 [2]中国石油西南油气田分公司 [3]四川石油管理局

出　　处：《国外测井技术》2007年第3期22-25,3,共4页World Well Logging Technology

基　　金：本文受四川省高校石油工程测井重点实验室基金项目20062D046资助。

摘　　要：搞清地应力大小的分布情况，可为钻井设计、油层改造和开发井网的调整及预测原生裂缝发育方向提供可靠的依据。确定地应力的方法有多种，其中凯塞效应法测定地应力是一种较为有效可行的方法。本文基于凯塞效应实验，测定了川中公山庙构造的沙溪庙～大安寨组地层5块岩芯的地应力，结合测井计算的地应力数值，对实验结果及影响因素进行了分析，发现测井计算的动态地应力大于实验测定的静态地应力，其原因是实验测定静态地应力没有考虑到孔隙压力的贡献，需要对测量值进行校正，校正后的地应力与测井计算的地应力非常接近，误差较小，说明测井计算的地应力能够满足现场钻井工程需要。Knowing the distribution of formation stress can provide reliable basis for drilling design,reservoir reformation,adjustment of development well net and development direction prediction of the primary fractures.There many methods to determine formation stress.One of them is Kayser Effect wihch is more available and feasible.Based on Kayser Effect experiment,the formation stress of 5 cores in Shaximiao-Daan- zai Group of Gongshangmian Structure in the middle of Sichuan is measured.The experimental result and influencing factors are analysod combining the formation stress value calculated with well logging.It is found that the dynamic formation stress calculated with well logging is greater than the static one.The reason is that pore pressure is not taken account of when determining the static formation stress by exper- iments.It needs correction.After correction,the formation stress value is much dose to the one calculated through well logging and the error is less,which explains that the formation stress calculated through well logging can meet the requirements of drilling engineering in the field.

关 键 词：公山庙构造 岩石声发射 凯塞效应 静态地应力 动态地应力 

分 类 号：TE122.23[石油与天然气工程—油气勘探]