鄂尔多斯盆地上古生界全油气系统成藏特征与天然气富集地质模式  

Upper Paleozoic total petroleum system and geological model of natural gas enrichment in Ordos Basin,NW China

作　　者：姜福杰[1,2] 贾承造[1,3] 庞雄奇[1,2] 姜林 张春林[3,4] 马行陟[3,5] 齐振国[1,2] 陈君青 庞宏[1,2] 胡涛[1,2] 陈冬霞[1,2] JIANG Fujie;JIA Chengzao;PANG Xiongqi;JIANG Lin;ZHANG Chunlin;MA Xingzhi;QI Zhenguo;CHEN Junqing;PANG Hong;HU Tao;CHEN Dongxia(State Key Laboratory of Petroleum Resources and Prospecting,Beijing 102249,China;College of Geoscience,China University of Petroleum(Beijing),Beijing 102249,China;PetroChina Research Institute of Exploration and Development,Beijing 100083,China;Key Laboratory of Gas Reservoir Formation and Development,CNPC,Langfang 065007,China;Key Laboratory of Basin Structure&Hydrocarbon Accumulation,CNPC,Beijing 100083,China)

机构地区：[1]油气资源与探测国家重点实验室,北京102249 [2]中国石油大学(北京)地球科学学院,北京102249 [3]中国石油勘探开发研究院,北京100083 [4]中国石油天然气集团公司天然气成藏与开发重点实验室,河北廊坊065007 [5]中国石油天然气集团公司盆地构造与油气成藏重点实验室,北京100083

出　　处：《石油勘探与开发》2023年第2期250-261,共12页Petroleum Exploration and Development

基　　金：国家自然科学基金面上项目(41872128);中国石油天然气集团有限公司项目(2012DJ0101)。

摘　　要：通过对鄂尔多斯盆地上古生界烃源岩、生储盖组合和天然气成藏特征的分析,从全油气系统的角度,讨论天然气成藏富集主控因素,建立该盆地上古生界全油气系统天然气富集模式。结果表明,烃源岩、断裂和致密储集层等要素及其相互耦合关系对天然气分布和富集具有控制作用,其中,烃源岩的分布和生烃能力控制源内滞留页岩气和致密气的富集程度和分布范围;烃源岩的生烃能力与致密储集层的物性耦合关系控制盆地中心近源致密气的分布和甜点发育;盆地边缘远源致密气主要受断裂展布的控制,并且使得源内、近源和远源天然气分布受断裂调整改造。鄂尔多斯盆地上古生界天然气具有源内的煤层气与页岩气、致密砂岩夹层气和近源致密天然气、远源断裂输导天然气4种富集模式,目前盆地勘探的重点是源内致密气、近源致密气,未来煤层和页岩气、远源天然气聚集将是重要的潜在勘探领域。Based on the analysis of Upper Paleozoic source rocks,source-reservoir-caprock assemblage,and gas accumulation characteristics in the Ordos Basin,the gas accumulation geological model of total petroleum system is determined.Then,taking the Carboniferous Benxi Formation and the Permian Taiyuan Formation and Shanxi Formation as examples,the main controlling factors of gas accumulation and enrichment are discussed,and the gas enrichment models of total petroleum system are established.The results show that the source rocks,faults and tight reservoirs and their mutual coupling relations control the distribution and enrichment of gas.Specifically,the distribution and hydrocarbon generation capacity of source rocks control the enrichment degree and distribution range of retained shale gas and tight gas in the source.The coupling between the hydrocarbon generation capacity of source rocks and the physical properties of tight reservoirs controls the distribution and sweet spot development of near-source tight gas in the basin center.The far-source tight gas in the basin margin is mainly controlled by the distribution of faults,and the distribution of inner-source,near-source and far-source gas is adjusted and reformed by faults.Generally,the Upper Paleozoic gas in the Ordos Basin is recognized in four enrichment models:inner-source coalbed gas and shale gas,inner-source tight sandstone gas,near-source tight gas,and far-source fault-transported gas.In the Ordos Basin,inner-source tight gas and near-source tight gas are the current focuses of exploration,and inner-source coalbed gas and shale gas and far-source gas will be important potential targets in the future.

关 键 词：上古生界 致密气 全油气系统 成藏特征 富集模式 鄂尔多斯盆地 

分 类 号：TE122.1[石油与天然气工程—油气勘探]