分形测井解释方法研究

Simple explanation on fractal well-log interpretation

1. 河北科技大学,河北石家庄 050054;2. 成都理工大学,四川成都 610059;3. 河南油田通信公司,河南南阳 473132

Hebei University of Science and Technology, Shijiazhuang 050054, China

将欧氏空间的体积概念在分形空间作适当推广,提出了岩石分形体积模型,并在此基础上推导了岩石分形 体积模型的测井响应方程,给出了非均质地层孔隙度的计算方法。同时,利用分形理论的幂定律,对泥质含量、 含水饱和度和渗透率等参数的计算公式作了改进,可以更好地适应非均质地层参数的计算。实际测井资料处理 结果表明,用分形测井解释方法计算的地层参数精度比常规方法的高。

The volume concept in Euclidean space is reasonably extended to the fractal space, and the rock fractal volume model is described. Based on this model, the well-log response equation is deduced and the calculation of inhomoge-neous formation porosity. In addition, the important forms used to calculate the formation parameters, such as shale volume, water saturation and permeability, are improved to be more suitable for the calculation of inhomogeneous formation parameters according to the power law of fractals. It indicates that the precisions of formation parameters through the fractal well-log interpretation are highly according to the well-log data processing and the comparison among the core, fractal-calculated and normal-calculated porosities. The prospective view of this technique would be presented in the future well-log interpretation of inhomogeneous formation.