油气封盖层中涂抹效应的成因机制新解  

A New Explanation for the Genetic Mechanism on the Smear Efficiency within Oil-Gas Sealing Covers

作　　者：郭建[1] 孙岩[1] 朱文斌[1] 郭继春[1] 黄钟瑾[1] 刘德良[2] 

机构地区：[1]南京大学地球科学系矿床成因国家重点开放实验室 [2]中国科技大学空间科学系,合肥230026

出　　处：《南京大学学报（自然科学版）》2002年第6期766-770,共5页Journal of Nanjing University（Natural Science）

基　　金：油气藏地质及开发工程国家重点实验室开放基金(PLN0105);国家自然科学基金(40173001;40172072)

摘　　要：在陕北油气钻孔岩芯超微滑移流变岩层中发现优选排列的微粒密集带.兹系因与滚动、研磨和压扭作用有关,故将球形微粒称“磨粒”.细究其成因,则同岩石韧脆性变形,滑移侧压力作用和动力甚低级变质活动有关.系统样品测试分析,泥岩中的含磨粒滑移流变层具涂抹效应,起到油气封盖层的作用.这方面的探讨有助于把现代微观地质学新理念引入到油气盖层的研究中.Bands-concentrated micrograins of the ultramicro-slip rheological beds have been discovered in some rock cores of drilling holes for the oil-gas exploration, northern Shaanxi Province. They were caused by some relative actions of rotation, grinding and compresso-shearing, so these globe micrograins are called grinding grains. The grinding grains are considered to correspond to effects of the rock ductle-brittle deformation, slipping for lateral compression and very low grade metamorphism. In the mudstone Theologically slipping beds containing grinding grains are found to possess a sear efficiency through systematic analyses of the samples, and they constitute fine sealing beds of the oil-gas in the petroleum geology.

关 键 词：油气封盖层 成因机制 磨粒结构 韧脆性变形 涂抹效应 油气地质 

分 类 号：P618.130.2[天文地球—矿床学]