利用反演实现高频等参数感应测井曲线的对称化

高频等参数感应测井仪单发双收的天线系结构，导致了测井响应关于地层的不对称性。这种不对称性限制了仪器5条测井曲线的综合解释，仪器优势得不到有效发挥。本文提出采用一维反演技术实现仪器测量曲线对称化的处理方法，该方法的核心思想是，分别对实测资料的每一条曲线进行一维反演，得到一个电阻率剖面。以该剖面为地层模型，改变仪器天线系发射线圈和接收线圈的相对位置，进行模拟计算得到一条新的曲线，将该曲线与实测曲线取平均。理论研究结果表明，该方法得到的仪器响应曲线与采用对称化天线系结构仪器得到的结果等效。实际资料处理结果表明，这种处理方法是有效可靠的，软件处理可以替代硬件补偿实现测井响应曲线的对称化。

Symmetrization of VIKIZ Logging Curves Through Inversion

The symmetrical response of VIKIZ logging tool to the bed,due to asymmetrical design of the antenna,limits the application of the curves.A new symmetrization method,based on one dimensional inversion of VIKIZ logging curves is proposed in this paper.In the method,we invert the logging curves on one dimension model of the formation,namely there is only horizontal interface in the formation.During the inversion,we fit each of the five logging curve and its synthetic curve as good as we can,then we obtain five one dimensional formation profile without considering that if the five profiles are consistent and reasonable or not.Using the five models respectively,we synthesize the new five curves by exchanging the position of transmitter with the receivers.Averaging the new five curves with their original curves,we obtain five new symmetrical curves.Theoretical analysis and application to field data of the method show that this symmetrizing method is reasonable,which can replace the symmetrizing method through hardware design.