高分辨率阵列感应测井倾角影响校正研究

Correction of Dipping Effect on High Resolution Array Induction Logging

倾角影响校正是大斜度井和高倾角地层中应用阵列感应测井数据正确解释的前提。针对高分辨率阵列感应测井(HDIL),研究斜井解析几何因子与数值几何因子响应特性,比较分析两种几何因子的优缺点,建立解析体积几何因子和数值电荷几何因子相结合的信号处理倾角影响校正新方法,推导出设计体积滤波器和电荷滤波器的基本方程及约束条件。计算机仿真表明,基于新方法设计的滤波器和算法在倾角小于75°范围内可以有效消除测井数据中的倾角影响。

Dip correction is a prerequisite for the right interpretation of the array induction logging data in highly deviated well and highly dipping bed.Aiming at the high resolution array induction logging,the response characteristics of the analytic geometric factor and the numerical geometric factor of a deviated well were studied,and the advantages and disadvantages of two geometric factors were compared and analyzed.A new signal processing method for dip effect correction was established by combining the analytic volume geometric factor with the numerical charge geometric factor,and the basic equations and constraint conditions for the design of volume filter and charge filter were derived.Simulation result shows that the filters and algorithm designed based on the new method can effectively eliminate the dip effect of logging data when the dip angle is less than 75°.