摘要
钻井过程中致密油储层受泥浆侵入影响,使得阵列感应测井(AIT)视电阻率偏离地层真电阻率。以陇东地区延长组致密油储层为研究对象,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。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 use 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 is very close to the water saturation of actual measurement,the true resistivity of oil reservoirs is more accurate after the correction,the new method is feasible.
出处
《测井技术》
CAS
CSCD
2017年第6期696-700,共5页
Well Logging Technology
基金
国家重点基础研究发展计划(973)项目子课题(2013CB228003)
关键词
测井解释
致密油储层
泥浆侵入
阵列感应测井
几何因子
地层真电阻率
鄂尔多斯盆地
log interpretation
tight oil in Yanchang group
mud invasion
array induction logging
geometric factor
true resistivity
Erdos basin
