库车地区高矿化度泥浆影响下的电阻率校正方法研究

为了克服克拉地区膏盐地层垮塌及地层压力对钻井的影响，在钻井过程中往往采用高矿化度、大密度的钻井液.这使得渗透性地层中观测得到电阻率与实际的电阻率存在较大的偏差，给测井解释带来极大的困难.本文针对克拉地区的实际情况，对高矿化度泥浆影响下的电阻率校正方法进行了探索性研究，提出了基于岩心资料的电阻率校正方法及基于泥浆动态侵入的图版校正电阻率方法，最后通过毛管分析饱和度与校正后电阻率计算饱和度对比验证校正电阻率的可信性.结果表明，校正后电阻率更能真实的反映地层电性特征，进一步提高了测井解释符合率.

A study on the resistively correction method under high salinity mud influence in the Kela,Kuche area

In order to overcome the influence of collapsed gypsum-salt formation and formation pressure on drilling in the Kela,Kuche area, people oftem use a fluid of high mineralization and big density during production. This makes the measured resistivity in the permeable strata differ much from the realistic values, and brings great difficulties to log interpretation. Based on the actual case of the Kela area, this work attempts to study the resistivity correction method to the influence of high-mineralization mud. We propose that the obserred resistivity can be corrected based on care data and patterns of dynamic mud intrusion. Then we compare the saturation from hair analysis and that calculated after the correction; and verify the rebiability of the resistivity correction. The result shows that the corrected resistivity can reflect better the real eletric feature of strata and further enhance the accuracy of logging interpretation.