致密油储层阵列感应测井泥浆侵入校正方法研究  

Study on the correction of array induction resistivity effect from drilling mud invasion of tight oil reservoir

作　　者：吕斯端 夏宏泉[1] 文晓峰 

机构地区：[1]西南石油大学油气藏地质及开发工程国家重点实验室 [2]中国石油集团测井有限公司长庆事业部

出　　处：《国外测井技术》2017年第1期13-16,40,共5页World Well Logging Technology

基　　金：国家重点基础研究发展计划(973)项目子课题(2013CB228003)

摘　　要：钻井过程中致密油层受泥浆侵入影响,使得阵列感应视电阻率偏离地层真电阻率。要准确计算Sw就必须对AIT电阻率曲线的泥浆侵入影响进行校正。本文以陇东地区延长组致密油层为研究对象,利用微分几何因子法对阵列感应测井视电阻率曲线进行泥浆侵入校正以求取地层真电阻率。结果表明:经过泥浆侵入校正后的阵列感应深电阻率曲线更符合储层电性特征,且用校正后的电阻率计算的含水饱和度与岩石密闭取心实测的含水饱和度较为吻合,进一步印证了该方法的可靠性。There exits an invading zone in Yanchang group in Longdong region which makes array induction resistivity deviate from the true resistivity of reservoirs. In order to get over the effect of invading, we proposed geometric factor of array induction logging to correct the array induction resistivity of reservoirs and calculate the true resistivity. We used the corrected resistivity to calculate the water saturation and found it very close to the water saturation of actual measurement, the true resistivity of oil reservoirs proved to be more accurate after the correction, the new method proved to be feasible.

关 键 词：延长组致密油 泥浆侵入 阵列感应电阻率 几何因子 地层真电阻率 

分 类 号：P631.83[天文地球—地质矿产勘探]