测井曲线自动分层解释方法研究

Study on well logging curve auto-subdivide formation method

文章通过对测井曲线幅值和形态特征的分析,在求取测井曲线一阶、二阶导数的基础上,提出了利用测井曲线拐点自动划分地层界面和利用极值提取层内测井特征值的方法。在准确划分出地层界面的基础上,利用层内测井曲线特征值(电阻率、孔隙度、含水饱和度等)确定测井解释结论。通过对实际资料的处理,结果表明,该方法分层界面合理准确,效果明显,且简便实用,具有较高的应用价值。

On the basis of researching of well-logging curves amplitude and shape characters,and solving the first and second derivatives of logging curve,this article puts forward a method to auto-subdivide formation by using the inflexion of well-logging curve and pick formation eigenvalue by using the extremum of well-logging curve.After auto-subdividing formation accurately,logging interpretation result can be built automatically by utilizing of the formation eigenvalues such as porosity,saturation and resistivity.According to the above method,data processing has been implemented to practical well-logging data.Analysis of the examples shows that formation interface acquired according to the method is logical and exact,and that the method is very simple and convenient.