岩心深度归位的MATLAB自动计算

Automated MATLAB calculation of core depth return

由于钻井深度的获取方式与测井深度不同,导致钻井取心的深度与测井深度存在插值,需要进行岩心深度归位方可利用岩心数据辅助测井解释。本文利用MATLAB通过三次样条插值法等多种插值方法测井曲线进行插值,然后分别计算不同归位深度下岩心孔隙度与物性测井曲线之间的误差并将误差最小情况下的深度变化值确定为归位深度。该方式不仅操作便利,计算快捷,且能够在归位精度方面优于手动归位,为后续建立测井解释模型奠定了更好的基础。

Due to the different acquisition of drilling depth and logging depth,there is interpolation of drilling core depth and logging depth.Core depth placement is required to using core data to assist logging interpretation.In this paper,MATLAB is used to interpolate logging curves by various interpolation methods such as cubic spline interpolation method,and then the error between the core porosity and physical logging curves at different homing depths is calculated respectively,and the depth change value under the minimum error is determined as the homing depth.This method is not only convenient to operate,fast to calculate,but also better than manual return in terms of return accuracy,which lays a better foundation for the subsequent establishment of logging interpretation model.