川东北清溪场裂缝型气藏形成过程分析  

Gas Reservoir Accumulation Process of Qingxichang Fractured Reservoir in Northeastern Sichuan Basin

作　　者：于建宁[1] 邹华耀[1] 

机构地区：[1]中国石油大学(北京)地球科学学院,北京102249

出　　处：《石油天然气学报》2012年第1期31-34,40,共5页Journal of Oil and Gas Technology

基　　金：国家科技重大专项(2011ZX05005-003-009HZ)

摘　　要：在局部构造发育演化史、天然气的成因类型与来源、流体包裹体特征与天然气的充注史分析的基础上,分析了清溪场裂缝型气藏的天然气成藏过程。结果表明,清溪场裂缝型气藏的天然气主要为上二叠统烃源岩的干酪根裂解气;裂缝型气藏的储层的有机包裹体以天然气包裹体为主,天然气的充注时间为中-晚侏罗世;晚燕山-喜山期,大巴山的强烈挤压推覆产生构造叠加,直接导致清溪场背斜和裂缝型储集层形成,干酪根裂解气沿断裂运移至储集层形成裂缝型天然气藏;裂缝型储集层的形成与规模直接影响了天然气的充注和聚集规模。On the basis of analyzing local structural development history,gas genetic types and origin,fluid inclusion features and gas filling history,the gas reservoir forming process of Qingxichang fractured reservoirs was analyzed.The result indicates that thee gas in there was mainly originated from kerogen crackings of the upper Permian source rocks.Gas inclusions were mainly organic inclusions of the fractured reservoirs,and the gas was mainly charged during mid-late Jurassic system.The thrust of Daba mountain during Late Yanshan and Himalayan Movement result in the formations of Qingxichang anticline and fractured reservoirs,then gas of kerogen crackings is migrated along faults and fractures to fractured reservoirs and is accumulated as gas pool.The formation and scale of fractured reservoirs directly influence the natural gas charge history and accumulation scale.

关 键 词：裂缝型气藏 成藏过程 清溪场 川东北 

分 类 号：P618.13[天文地球—矿床学]