Abstract: The in-layer heterogeneity of elastic reservoirs directly affect the verticalsweeping efficiency of the injection fluid. The subject is dealt with in two parts:(1)permeability contrast and the location of the interval with the highest permeability;(2)the vertical and horizontal permeability ratio on the strata scale, all being closely related to the pattern of deposition of the elastic reservoirs. Eight deposition patterns are proposed: lateral accretion, vertical accretion, progradation, aggradation and channel filling, winnowing, turbidity, sheetflood and sieve deposition, Examples are cited of ancient and modern sedimentary deposits for illustration of the basic aspects of in-layer heterogeneity of sand bodies formed under different patterns of deposition.

摘要： 碎屑岩储层的层内非均质性,直接影响着注入剂的厚度波及系数,主要包括两部分内容:一是层内渗透率的差异和最高渗透率段所处的位置,二是全层规模的垂直与水平渗透率比值。而这些储层特征与沉积方式密切相关。本文把碎屑岩的沉积方式分为八种:侧积、垂积、前积、填积、选积、浊积、漫积和筛积,用古代和现代沉积砂体实例,分别讨论了各种沉积方式所形成砂体的层内非均质性基本面貌。

关键词: 层内非均质性, 沉积方式, 碎屑岩储层, 水平渗透率, 沉积砂体, 侧积体, 波及系数, 碎屑物, 泥质夹层, 大庆油田