塔北及周缘地区奥陶系碳酸盐岩烃源岩生-残-排烃特征  

Hydrocarbon generation,residual hydrocarbon and petroleum expulsion characteristics of Ordovician carbonate source rocks in northern Tarim and its surrounding areas

作　　者：庞宏[1,2] 庞雄奇[1,2] 吴松 陈君青[2,4] 胡涛 姜福杰[1,2] 陈冬霞[1,2] PANG Hong;PANG Xiongqi;WU Song;CHEN Junqing;HU Tao;JIANG Fujie;CHEN Dongxia(College of Geosciences,China University of Petroleum(Beijing),Beijing 102249,China;State Key Laboratory of Oil and Gas Resources and Exploration,China University of Petroleum(Beijing),Beijing 102249,China;Shenzhen Branch of China National Offshore Oil Corporation(CNOOC)Limited,Shenzhen 518054,China;College of Science,China University of Petroleum(Beijing),Beijing 102249,China)

机构地区：[1]中国石油大学(北京)地球科学学院,北京102249 [2]中国石油大学(北京)油气资源与探测国家重点实验室,北京102249 [3]中国海洋石油总公司深圳分公司,广州深圳518054 [4]中国石油大学(北京)理学院,北京102249

出　　处：《地学前缘》2023年第6期213-231,共19页Earth Science Frontiers

基　　金：国家自然科学基金项目(U19B6003-02,41872148)。

摘　　要：塔里木盆地塔北及周缘地区奥陶系碳酸盐岩作为有效烃源岩已成为学者们的共识,然而,对碳酸盐岩烃源岩生、残、排烃特征及贡献研究相对较为薄弱。本文通过研究区21口井测井、热模拟参数等数据分析,应用地质地球化学统计分析与数值模拟相结合的方法,分析了生-残-排烃特征,并阐明了不同演化阶段排烃相态特征和排烃量贡献。结果表明:奥陶系碳酸盐岩烃源岩生烃中心位于顺托果勒-顺南缓坡,烃源岩以水溶相、油溶相、扩散相和游离相多种相态的综合排烃,不同相态排烃比例分别为6.5%、0.4%、9.8%和83.3%。结合研究区优势运移通道及优质储层分布区域,顺托果勒低隆起-顺南缓坡断裂展布区以及沙西凸起南部-顺北缓坡带等地区可作为下一步的重点勘探地区。The Ordovician carbonate rocks in northern Tarim Basin and its surrounding areas are considered effective source rocks,however,their hydrocarbon generation,residual hydrocarbon and petroleum expulsion characteristics and the relative contribution to petroleum accumulation are not well understood.Based on the logging data and thermal simulation parameters for 21 wells in the study area,combined with geological and geochemical statistical analysis and numerical simulation,this paper aims to address the above issues and reveal the hydrocarbon expulsion behavior of source rocks in different evolutionary stages.The results show that the hydrocarbon generation center is located in the gentle slope area of Shuntuogol-Shunnan region.The hydrocarbon expulsion occur broadly in the water-soluble,oil-soluble,diffusive and free phases in proportion of 6.5%,0.4%,9.8%and 83.3%,respectively.Combined with the dominant migration channels and high-quality reservoir distribution in the study area,the fault zones of the Shuntuogol low uplift/Shunnan gentle slope and southern Shaxi uplift/Shunbei gentle slope zone are identified as the next key exploration areas.

关 键 词：有效烃源岩 排烃特征 演化阶段 排烃相态 排烃贡献 

分 类 号：P618.130.1[天文地球—矿床学] P534.42[天文地球—地质学] P593