大民屯凹陷超压发育机制及其成藏意义  

Forming Mechanism of Overpressure and Its Significance on Hydrocarbon Accumulation in Damintun Sag

作　　者：史建南[1] 姜建群[2] 陈富新[2] 顾国忠[2] 

机构地区：[1]中国石油大学石油天然气成藏机理教育部重点实验室,北京102249 [2]中国石油辽河油田分公司勘探开发研究院,辽宁盘锦124010

出　　处：《吉林大学学报（地球科学版）》2005年第6期745-750,共6页Journal of Jilin University：Earth Science Edition

基　　金：国家杰出青年科学基金项目(40125008);教育部重大科技项目(10419)

摘　　要：沉积盆地超压具多样性,超压演化具系统性,超压的发育受多种因素控制。大民屯凹陷构造沉降史、沉积埋藏史、热史及生烃史等多种因素与剩余压力演化史有着良好的耦合匹配关系。压实不均衡和生烃作用分别是本区超压发育、演化不同阶段的主控因素。超压提供了油气运移的动力和通道,提高了高分子量组分,特别是“蜡”的排出效率是泥岩穿刺构造的诱发因素,亦可作为下伏油气藏的优质盖层,为本区油气富集成藏的有利保障。The overpressure states of sedimentary basin are multiform, and their evolutions are systematic. In Damintun sag, there are appropriate coupling-matching associations among burial histories, heat flow histories, histories of hydrocarbon generation and the process of overpressure evolution. Compaction disequilibrium or hydrocarbon generation is main controlling factor of different phases for the development and evolution of overpressure. The overpressure is the force of hydrocarbon migration and can offer the pathway of oil/gas migration and improve the expelling efficiency of high-waxy oil. Furthermore, it causes the formation of mud diapir and is the pressure confining beds for the underlying oil and gas accumulation.

关 键 词：大民屯凹陷 超压 多因素耦合 发育机制 成藏意义 

分 类 号：P618.13[天文地球—矿床学]