砂岩储层中自生高岭石的研究进展  

Research Progress of Authigenic Kaolinite in the Sandstone Reservoirs

作　　者：韩信[1] 蒋艳霞[1] 黄树光[1] 

机构地区：[1]成都理工大学地球科学学院,四川成都610059

出　　处：《中外能源》2016年第3期31-40,共10页Sino-Global Energy

基　　金：中国石油长庆油田公司"十二五"国家科技重大专项下属专题"上古生界低渗透砂岩储层非均质性评价"(编号:2011ZX05044)资助

摘　　要：自生高岭石作为沉积岩中最为常见的自生黏土矿物之一,受到了人们的广泛关注。由于自生高岭石可能对储层物性造成较大的影响,在石油地质学、储层沉积学等领域对其进行研究具有重要意义。在前人研究的基础上结合笔者自己的研究,对自生高岭石的形成环境、形成机制、赋存状态及其对储层物性的影响等问题进行归纳总结,主要有以下几点认识:自生高岭石的形成与酸性流体和大气淡水有着直接的关系,同时酸性流体的产生可能受到多种因素如煤系地层、油气充注的影响;长石类矿物的溶蚀作用是自生高岭石形成的主要物质来源,在该过程中Al3+含量并非处于平衡状态;自生高岭石可能形成于埋藏成岩作用多个阶段,但主要在早成岩作用阶段形成;自生高岭石和储层物性之间的关系受其赋存状态、分布特征以及储层砂岩的成熟度等因素的制约。研究还表明,在某些地区,如鄂尔多斯盆地上古生界盒8段,自生高岭石的形成对储层物性是有利的。As one of the common authigenic clay mineral among sedimentary rocks,authigenic kaolinite has been paid more and more attention.Since the authigenic kaolinite may cause great impact on physical proper-ties of reservoir,its research has great significance in the field of petroleum geology,reservoir sedimentology and so on.Formation environment,growth mechanism,occurrence and the effect on physical properties of sandstone reservoir and so on were summarized based on the author ′s research and previous studies.It mainly has following understanding： the formation of the authigenic kaolinite has direct relationship with acidic fluid and meteoric water,and acidic fluid may be affected by coal strata and hydrocarbon charging;feldspar dissolution is the main material source for the formation of the authigenic kaolinite,and Al3＋content is not in equilibrium in the process of the formation of the authigenic kaolinite;the authigenic kaolinite probably formed in multiple stages of burial diagenesis,but mainly formed in the early stage of diagenesis;the relationship between the authigenic kaolinite and sandstone reservoir properties is restricted by the occurrence and distribu-tion characteristics of the kaolinite and the maturity of sandstone and so on.Research also shows that the formation of the authigenic kaolinite is favorable to the physical property of reservoir in some area such as He8 member in upper Paleozoic of Ordos Basin.

关 键 词：黏土矿物 自生高岭石 形成机制 赋存状态 储层物性 

分 类 号：P618.13[天文地球—矿床学]