吉木萨尔凹陷芦草沟组页岩油有效储层物性下限研究  

Study on lower limit of physical properties of effective shale oil reservoirs of Lucaogou Formation,Jimsar Sag

作　　者：李映艳[1] 邓远 何吉祥 彭寿昌[1] 宋斯宇 李一鸣 范青青 刘达东 LI Yingyan;DENG Yuan;HE Jixiang;PENG Shouchang;SONG Siyu;LI Yiming;FAN Qingqing;LIU Dadong(Research Institute of Exploration and Development,Xinjiang Oilfield Company,Xinjiang 834000,China;State Key Laboratory of Petroleum Resources and Engineering,China University of Petroleum(Beijing),Beijing 102249,China;Unconventional Petroleum Research Institute,China University of Petroleum(Beijing),Beijing 102249,China)

机构地区：[1]中国石油新疆油田分公司勘探开发研究院,新疆克拉玛依834000 [2]中国石油大学(北京)油气资源与工程全国重点实验室,北京102249 [3]中国石油大学(北京)非常规油气科学技术研究院,北京102249

出　　处：《断块油气田》2025年第1期20-26,共7页Fault-Block Oil & Gas Field

基　　金：中石油战略合作专项“页岩油赋存和可动性控制因素及其富集机理”(ZLZX2020-01-06-03);中国石油大学(北京)青年拔尖人才项目“吉木萨尔凹陷芦草沟组页岩油赋存和可动性研究”(2462021BJRC010)。

摘　　要：吉木萨尔凹陷芦草沟组页岩油储层为陆源碎屑-碳酸盐-火山碎屑多元混积层系。文中基于高压压汞、核磁共振和N2吸附实验,综合利用经验统计法、孔渗关系法、核磁共振法、水膜厚度法、含油产状法和J函数法对芦草沟组页岩油储层的孔隙度与渗透率下限开展研究。结果表明,通过各类方法计算得到的芦草沟组有效储层孔隙度下限分布范围在3.88%~6.57%,渗透率下限分布范围在0.0059×10^(-3)~0.0120×10^(-3)μm^(2)。综合分析各方法优缺点及适用性,最终优选出核磁共振法与水膜厚度法2种方法来明确芦草沟组有效储层物性下限,得到芦草沟组页岩油有效储层孔隙度下限为5.92%、渗透率下限为0.01×10^(-3)μm^(2)。研究成果可为该地区页岩油藏开发和储量计算提供可靠支撑。The shale oil reservoirs of Lucaogou Formation in Jimsar Sag is a mixed terrigenous-clastic-carbonate-pyroclastic sedimentary system.The lower limits of porosity and permeability of shale oil reservoirs of Lucaogou Formation were studied based on high-pressure mercury injection,nuclear magnetic resonance(NMR)and nitrogen adsorption experiments,comprehensively combining with empirical statistic method,porosity-permeability correlation method,nuclear magnetic resonance method,water film thickness method,oil-bearing occurrence method and J-equation method.The results show that,the lower limit of effective reservoir porosity ranges from 3.88%to 6.57%,and the lower limit of reservoir permeability varies from 0.0059×10^(-3)μm^(2)to 0.0120×10^(-3)μm^(2),calculated by various methods.After analyzing the advantages,disadvantages and applicability of each method,the NMR method and water film thickness method were selected to determine the lower limit of physical properties of effective reservoirs of Lucaogou Formation.It is concluded that the lower limit of porosity of effective shale oil reservoirs of Lucaogou Formation is 5.91%and the lower limit of permeability is 0.01×10^(-3)μm^(2).The results provide reliable support for shale oil reservoir development and reserve calculation in this area.

关 键 词：页岩油 有效储层 物性下限 最小流动孔喉半径 芦草沟组 

分 类 号：TE122.1[石油与天然气工程—油气勘探]