南华北地区上古生界砂岩成岩作用及影响  

Diagenesis of Upper Paleozoic sandstone and its effect on reservoir in southern North China

作　　者：张威[1] 李勇[1] 张自力[1] 祝新政[1] 曹兴[1] 

机构地区：[1]成都理工大学油气藏地质及开发工程国家重点实验室,四川成都610059

出　　处：《断块油气田》2011年第5期578-581,共4页Fault-Block Oil & Gas Field

基　　金：国土资源部专项"华北上古生界油气资源战略选区"(2009GYXQ17)

摘　　要：根据野外露头、常规薄片、铸体薄片、扫描电镜、X衍射等资料分析,对南华北地区上古生界岩石学特征、成岩作用类型、成岩阶段划分及其对孔隙的影响进行了研究。结果表明:研究区上古生界岩石类型为长石石英砂岩、岩屑石英砂岩、长石砂岩、长石岩屑砂岩。现今主要处于中成岩A期和B期,经历的成岩作用有压实作用、胶结作用、交代作用、溶蚀作用、破裂作用。其中,压实作用、胶结作用是主要的破坏性成岩作用,而溶蚀作用、破裂作用是主要的建设性成岩作用,特别对长石和碳酸盐岩的溶蚀是储层物性变好的重要的成岩控制因素。The data of outcrop, cast slice, thin sections, scanning electron microscopy and X-diffraction were applied to analyze the petrology, diagenesis, diagenetic stage division and its effect on the porosity of Upper Paleozoic sandstone in the southern North China. The results show that the rock types are feldspar quartz sandstone, lithic quartz sandstone, arkose and feldspathic lithic sandstone in the study area of Upper Paleozoic reservoir. These sandstones have already been in stage A and B of the middle diagenetic stage. They experienced compaction, cementation, metasomatism, dissolution and fracturing. Among them, compaction and cementation are the main destructive diagenesis; dissolution and fracturing are major constructive diagenesis, especially feldspar and carbonate dissolutions are important controlling factors for favorable physical properties of reservoir.

关 键 词：成岩作用 储层 上古生界 南华北地区 

分 类 号：TE122.21[石油与天然气工程—油气勘探]