大民屯凹陷基岩油气成藏地质背景及主控因素  

作　　者：李珊珊 

机构地区：[1]辽河油田勘探开发研究院勘探综合所规划室,辽宁盘锦124010

出　　处：《内蒙古石油化工》2014年第19期68-70,共3页Inner Mongolia Petrochemical Industry

摘　　要：近年来通过对大民屯凹陷不同类型潜山的探索,形成了大民屯凹陷基岩成藏的新认识,突破了"潜山油藏"的概念,提出了大民屯凹陷基岩"整体含油,局部富集"的勘探理念,并对其控制因素形成了系统认识。本文主要从优质的烃源岩分布、上窄下宽的特殊地质结构、优势基岩的储层发育及有利于基岩成藏的高效输导体系等方面,论述了大民屯凹陷基岩油气成藏的地质背景。并指出了大民屯凹陷基岩油气富集的主控因素是优势储集层的分布及有利的源储配置,且断裂性质与油气富集程度具有密切关系,逆断层、大断距正断层附近是基岩内幕油气藏富集的有利场所。Based on the explores and study on different types of buried hill in the Damintun depression in recent years, the new recognition on basement of Damintun Depression is developed, with the traditional concept of ＇buried hill reservoir＇ challenged. So the new exploration theory was proposed for Damintun Depression and systematic recognition was established on the controlling factors of Damintun Depression, it is believed that ＇oil is existed in the whole depression and it accumulates locally＇. This article addresses the geological background of basement reservoir forming in Damintun Depression in the aspects of the distribution of high--quality source rocks, special geological structure with narrow on the top and wide on the bottom, the oil reservoir development of the dominant basement and efficient transforming system favorable for basement forming. It also points out that the major controlling reason for basement enrichment is the favorable reservoir distribution and good source rocks configuration, and the nature of the fault is closely related to hydrocarbon accumulation degree. The vicinity of reverse faults and the centripetal fault with great fault displacement is the favorable places of hydrocarbon enrichment inside the basement.

关 键 词：基岩油气藏 整体含油 局部富集 优势储集层 

分 类 号：P618.130.2[天文地球—矿床学]