利用测井曲线绘制煤岩层真厚对比图

Coal and Rock Strata True Thickness Contrast Section Plotting by the Use of Logging Trace

采用三次样条函数拟合测井数据,并使用新的采样间隔对其进行采样,将采样数据映射到真厚的钻孔柱状图上,从而绘制出真厚对比图。实际编程中,为保证其拟合精度及计算效率,实际采用的计算步长一般为本层厚度加上下扩展10m。选择采样间隔时,可对测井曲线进行抽稀,以减小数据占用的空间。该方法的使用解决了长期以来地质与测井对比图工作分离、结论出现差异的问题。

To use cubic spline fitted logging data, count out and resample logging traces corresponding to apparent thickness, then represent to true thickness borehole column, thereby the true thickness contrast section is plotted. During programming practice, to ensure fitting precision and calculating efficiency, generally the step length adopted is the calculating thickness extended 10 meters upward and downward respectively. The sampling interval of logging traces can be sparse for cut down of data space usage. The use of the method eliminated long-lasting problem of geologic and well logging contrast sections disrelation and have respective different conclusions.