储集性砂岩粒度组成的分形结构  

FRACTAL STRUCTURE OF GRANULARITY CONFIGURATION OF RESERVOIR SANDSTONES

作　　者：金强[1] 曾怡[1] 

机构地区：[1]石油大学勘探系

出　　处：《石油大学学报（自然科学版）》1995年第3期12-16,共5页Journal of the University of Petroleum,China(Edition of Natural Science)

摘　　要：利用崔在地区阜宁组三种不同成因类型的砂岩粒度含量与粒径之间的双对数关系，证明了粒度组成具有自组织的分形结构；计算结果表明，三角洲远砂坝、扇三角洲前缘砂和滨浅湖滩坝砂体粒度组成的分维分布在２～２．５之间，并且依次减小．说明它们的自组织程度依次降低，充分反映了这三种砂体的沉积演化特征，讨论了粒度分维与砂岩粘土含量、粒度中值、分选系数和储集性之间的关系，指出分形研究是定量描述砂岩结构和储集特征的有力工具。The granularity distribution has fractal characteristics. The study results of threegenetictypes of sand bodies of the Funing formation deposited in Cuizhuang area showed thatthere was linear relation on the bilogarithm coordinates between the contents and diameters ofthe granulariy. of the studied sandstones.The granularity fractals of delta distal bar, fan deltafront bar and offshore beach sand in the Jinhu lake in Palaeocene ranged from 2.0 to 2. 5 anddeclined one by one,which showed that the self-organi zations in the sandbodies reduced in theorder and resul ted from their sedi mentatons. The relations between the granulatity fractal ofthe sandstones and their clay content,granularity mid ian as well as sorting factor werediscussed in this paper.In conclusion, the fractal study is a power tool in quantitativedescription of sandstone strcture and reservoir characteristics.

关 键 词：储集层 砂岩 粒度分析 分形学 

分 类 号：P618.130.2[天文地球—矿床学]