岩石渗透率各向异性评价新方法

A New Method to Evaluate the Anisotropy of Rock Permeability

摘要: 岩石渗透率是一个典型的矢量，渗透率各向异性的测试和评价方法越来越受到人们重视。本文针对传统渗透率各向异性评价方法不能充分体现极值点影响、物理意义不明确、不便于岩心间的对比和归类等缺点，为了能够更加明确地表示储层岩石渗透率各向异性的特点，通过对前人评价岩石渗透率方法的研究，结合对不同岩性储层岩石的渗透率测试，提出了新的评价方法。包括用三向渗透率的几何平均代表岩心的视渗透率，用三角图表示各向异性渗透率的相对大小关系，用三向渗透率几何平均与算术平均比值来定量描述各向异性程度。通过对实际不同岩性岩心渗透率各向异性的具体应用，结果表明该新方法能科学、全面评价岩石渗透率各向异性。

Abstract: The permeability of rock is a typical vector, and more and more attention is paid to the testing and evaluation methods of the anisotropy of permeability. Based on traditional permeability anisotropy, evaluation methods cannot fully reflect extreme value point effect, physical meaning is not clear, is not convenient to contrast between the core and classify faults. In order to express the characteristics of anisotropy of permeability of reservoir rock more clearly, a new method of permeability evaluation is put forward based on the study of previous permeability evaluation methods of reservoir rock and the permeability test of reservoir rock of different lithology. The geometric average of the three-dimensional permeability is used to represent the apparent permeability of the core, the relative relationship between the anisotropic permeability and the ratio of the geometric average to the arithmetic average of the three-dimensional permeability is used to quantitatively describe the degree of anisotropy. The results show that the new method can scientifically and comprehensively evaluate the anisotropy of rock permeability.