大民屯凹陷油气运聚史研究  

The Study on Hydrocarbon Migration and Accumulation History in Damintun Depression

作　　者：姜建群[1] 张占文[2] 李军[2] 史建南[3] 

机构地区：[1]中国石油大学资源与信息学院,北京102249 [2]中国石油辽河油田分公司,辽宁盘锦124010 [3]中国地质大学资源学院,湖北武汉430074

出　　处：《吉林大学学报（地球科学版）》2005年第3期326-331,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)

摘　　要：运用油气组成非均质性,以大民屯凹陷丰富详实的分析测试资料为基础,“反演”了两大油气系统的油气主运聚方向。结果表明,大民屯凹陷油气总体组成非均质性、分子构成非均质性以及含氮化合物分布三方面的运移示踪效应基本一致,可以相互印证。“反演”结果表明,正常油和高蜡油都是围绕各自生油洼陷中心向周围构造高部位的斜坡带运移,在有利的圈闭中成藏。沿着该运移路径上如果有合适的圈闭条件就会聚集成藏,这为下一步勘探目标预测提供了依据。流体定年技术分析结果表明,大民屯凹陷主成藏时期为沙一、二到东营早期。安福屯洼陷成藏稍早于荣胜堡洼陷,因而高蜡油成藏略早于正常油。Basing on detailed test data of the Damingtun depression, the main charging pathway of two petroleum system is reconstructed by means of hydrocarbon compositional heterogeneity. Migration tracing results are nealy the same based on hydrocarbon bulk compositional heterogeneity, molecule construction heterogeneity and the distribution of nitrogen compound respectivly. It clearly shows that both normal oil and high-waxy oil were migrated to the the slopes from the centre of hydrocarbon kitchen of depression centers and were enriched in the reservoirs of the favorable traps. Some reservoirs could be formed on the pathways of the petroleum system only if only some favorable traps are met. Hence the present research could provide some information for the reservoir targets. KAr dating technique shows that the major pool forming time of the Daming sag is from the Sa1-2 to the early Dongying period. The pool forming time of the Anfutun sag is earlier than that of the Rongshenpu sag, which indicates that the high-waxy oil is earlier than the normal oil.

关 键 词：油气组成非均质性 K-Ar定年技术 运聚史 大民屯凹陷 

分 类 号：P618.13[天文地球—矿床学]