川东北地区石炭系油气成藏模式  

Hydrocarbon Accumulation Modes of Carboniferous in Northeastern Sichuan Basin

作　　者：吴警[1] 史建南[1] 郑荣才[1] 文华国[1] 罗韧[2] 胡承飞 

机构地区：[1]成都理工大学,四川成都610059 [2]中国石油西南油气田分公司川东北气矿,四川达州635000

出　　处：《天然气地球科学》2015年第7期1310-1315,共6页Natural Gas Geoscience

基　　金：国家自然科学基金项目(编号:41172120)资助

摘　　要：明确川东北地区石炭系油气充注特征、成藏机理有助于对其含油气系统进行深入认识。应用成藏动力学理论,以典型油气藏解剖为基础,以流体来源及其流动样式为核心,采用流体定年技术和油气运移方向示踪技术,通过样品分析测试、数值模拟实验和成藏机理的综合研究表明:志留系有机质是主要的供烃源,黄龙组裂缝—溶孔状白云岩为有利储集体,印支—燕山期地层—构造复合型圈闭提供了聚集空间;黄龙组主要存在210Ma和170Ma 2期油气充注过程,多期活动的构造裂缝和高压水力破裂缝与S/C不整合及C/P不整合构成了网状输导体系,从下至上的垂向运移特征显著,侧向局部小范围有一定的运移指向;整体呈现出"下生上储"的喜马拉雅期调整改造式成藏模式。Research on the filling characteristics and reservoir mechanism of Carboniferous oil and gas in northeast Sichuan Basin helps the understanding of the petroleum system. Based on the dynamics of petro- leum accumulation, typical hydrocarbon reservoir analysis, fluid source and its flow pattern, combined with fluid inclusion and tracking hydrocarbon migration path techniques, the regularity of hydrocarbon accumu- lation have been analyzed through sample analysis and numerical simulation experiment. Results suggest that the organic matter from Silurian is the main source rock;the dolomite from Huanglong Formation is the favorable reservoir; the stratum-structure trap in Yinzhi-Yanshan tectonic period provides a gathering space. There are two filling-periods in 210Ma and 170Ma. The tectonic fissure and S/C-C/P unconformity constitute reticular-passage system. Vertical migration is prominent and lateral migration is minor, which shows the accumulation model of ＂lower-generation and upper storage＂ adjustment reconstruction in Xis- han period.

关 键 词：油气性质与来源 成藏地质条件 成藏模式 石炭系 川东北 

分 类 号：TE122.3[石油与天然气工程—油气勘探]