双感应测井资料实用化快速迭代反演技术及其在大庆油田的应用

A Practical Fast Iterative Inversion Technique of Dual Induction Logging Data and Its Application in Daqing Oilfield

介绍了最近开发的一种双感应资料实用化快速迭代反演技术及其在大庆油田的应用,包括测井资料综合分层、双感应原始视电阻率提取以及快速正反演计算等内容。综合分层技术主要用于从双感应资料中提取层界面位置及地层电阻率初值,原始视电阻率提取主要用于消除3点反褶积和趋肤效应校正对原始视电导率的改变,实用化快速反演技术则主要用来消除井眼泥浆和围岩等对双感应资料的影响以获得更加准确反映地层侵入状态的地层电阻率。用该技术已处理了大庆油田60多口井的测井资料,取得了满意效果。

A practical fast iterative inversion （PFII）technique of Dual Induction Logging （DIL） data developed by authors recently and its application in Daqing Oilfield are introduced. The PFII technique contains integrative blocking, picking out accurate raw apparent conductivity, and fast forward and inversion of DIL data. The integrative blocking aims to get formation interfaces and initial values of formation resistivity from the DIL logs. The picking out accurate raw apparent conductivity tries to remove the influences of skin effect correction and three-point deconvolution on DIL. The practical fast inversion can reduce the effect of borehole mud and shoulder bed on DIL to obtain more accurate formation resistivity in showing characters of invaded formation. The technique has been used to process more than 60 wells of DIL data in Daqing oilfield and satisfactory results have been obtained.