库车前陆盆地强挤压应力条件下的测井电阻率校正方法  

Logging resistivity correction under the strong extrusion stress condition in the Kuqa Foreland Basin

作　　者：袁龙 章海宁 李国利 韩闯[2] 张文 王谦 

机构地区：[1]中国石油集团测井有限公司测井应用研究院,陕西西安710201 [2]中国石油塔里木油田公司勘探开发研究院,新疆库尔勒841000 [3]中国石油西南油气田分公司工程技术研究院,四川广汉618300

出　　处：《石油地球物理勘探》2018年第5期1085-1094,共10页Oil Geophysical Prospecting

基　　金：国家科技重大专项(2011ZX05046-03)资助

摘　　要：对于异常高压和强挤压条件下的库车前陆盆地,地应力常造成地层电阻率曲线值异常增大,水层以高阻气层的假象出现,导致利用电阻率测井资料识别储层流体性质存在多解性,给测井解释评价带来极大的困难。本文从实际情况出发,对强挤压应力条件影响下的电阻率校正方法进行了探索性研究,提出了基于理论分析和实验数据模拟的电阻率校正方法,最后通过压汞资料分析J函数求取的饱和度与校正后电阻率计算的饱和度进行对比,验证校正电阻率的可靠性。结果表明,校正后电阻率能更真实地反映地层电性特征,可进一步提高研究区深层裂缝性砂岩储层的测井解释符合率。The crustal stress in the Kuqa Foreland Basin often causes an abnormal increase of formation resistivity due to high-pressure and strong-extrusion condition.Resistivity curves of water layers look like that of high-resistivity gas beds,which results in inaccurate identification of reservoir fluid property in the resistivity logging data interpretation.Therefore we propose in this paper a resistivity correction method for the influence of strong compressive stress condition.This resistivity correction method is tested on theoretical analysis and experimental data simulations.The saturation comparison between the Function J calculation of mercury injection data and the corrected resistivity verifies the reliability of the resistivity correction method.The results show that the resistivity corrected by the proposed method reflects more authentically formation electrical characteristics,and further enhances the logging data interpretation of deep-fracture sandstone reservoirs in the study area.

关 键 词：前陆盆地 强挤压应力 电阻率校正 J函数 裂缝性砂岩 

分 类 号：P631[天文地球—地质矿产勘探]