摘要
玛18井区位于准噶尔盆地玛湖凹陷西斜坡,其下三叠统百口泉组以粗碎屑岩沉积为主,属扇三角洲—湖泊沉积体系。百口泉组可划分为上、中、下三段共九个砂层组,本文从垂向、横向和平面三个角度以砂层组或小层为单位剖析其沉积微相演化特征,沉积物主要来自北西和北东向,扇三角洲前缘水下分流河道沉积形成了百口泉组的主要储集层,仅T1 b22砂层组中下部以碎屑流沉积储层为主。三维地质建模研究表明,玛18井区百口泉组储层空间发育及演化特征受沉积微相约束明显。
Ma18 well area is located in the west slope of Mahu Sag,Junggar Basin.The lower Triassic Baikouquanformation is dominated by coarse clastic sedimentary,which formed by fan delta-lake sedimentary system.The Baikouquanformation can be divided into nine sand groups in the upper,middle and lower sections.In this paper,the evolution characteristics of sedimentary microfacies are analyzed from the vertical,horizontal and plane perspectives with the sand group or sublayer as the unit.The sediments are mainly from NW and NE directions.The underwater distributary channel deposition in the fan delta front forms the main reservoir of the Baikouquanformation,and only the clastic flow sedimentary reservoir is dominant in the middle and lower parts of the T1 b22.Three-dimensional geological modeling shows that the reservoir spatial development and evolution characteristics of Baikouquanformation in Ma18 well area are obviously constrained by sedimentary microfacies.
作者
朱键
董岩
朱越
张代燕
惠婧
王青春
ZHU Jian;DONG Yan;ZHU Yue;ZHANG Dai-yan;HUI Jing;WANG Qing-chun(Research Institute of Exploration and Development,Xinjiang Oilfield Company,PetroChina,Karamay 834000,China;Graduate School,Hebei GEO University,Shijiazhuang 050031,China;Colloge of Geoscience,Hebei GEO University,Shijiazhuang 050031,China)
出处
《河北地质大学学报》
2022年第5期32-41,共10页
Journal of Hebei Geo University
基金
国家专项(2017ZX05070)
股份专项(2017E-0415)
国家级一流本科课程“沉积岩岩石学”(教高函[2020]8号,冀教高函[2020]85号、[2020]25号)
省级、校级教改项目(2020GJJG589,2020J03)
省级研究生示范课程“沉积学原理”(KCJSX2021092)
省级课程思政示范项目“沉积岩岩石学”(冀教高函[2021]62号)。
关键词
玛湖凹陷
百口泉组
沉积微相
水下分流河道
地质建模
Mahu Sag
Baikouquan formation
sedimentary microfacies
underwater distributary channel
geological modeling
