摘要
选取鄂尔多斯盆地陇东地区庆探1井区山1段为目的层位,以研究区钻井资料为基础,结合沉积学、岩石学及测井相等方法,分析庆探1井区山1段岩相、构型表征、砂体叠置关系及发育特征等,建立砂体构型模式。结果表明:庆探1井区山1段共识别9种岩相类型;其储层内部构型界面可划分为单层微相复合体(复合河道带)、单一微相复合体(单一河道带)、单一微相(单砂体)、砂坝增生体、岩石相、层系(纹层组)6级;共识别水下分流河道砂体、河口坝砂体及沿岸滩坝砂体3个Ⅳ级构型单元的单砂体,以及3种砂体叠置方式——切叠式、拼接式和孤立式;平面上,砂体主要以点状、条带状和面状展布;庆探1井区山1段沉积期主要为曲流河三角洲前缘,水动力较弱、河流携砂能量小,形成近源缓坡型曲流河三角洲沉积模式。该结果为陇东地区山1段储层内部构型研究和气藏精细描述提供参考。
Based on the drilling in the study area,combined with sedimentology,petrology and logging facies,the lithofacies,configuration characterization,sand body superimposition relationship and development characteristics of Shan 1 Member in well block Qingtan 1 in Longdong Area of Ordos Basin are analyzed.The results show that 9 lithofacies types are identified in Shan 1 Member of Qingtan 1 Well Area,and the reservoir internal configuration interface can be divided into 6 levels:single-layer microfacies complex(composite channel belt),single microfacies complex(single channel belt),single microfacies(single sand body),sand bar accretion body,lithofacies and strata series(laminar formation).The single sand bodies of gradeⅣconfiguration units of underwater distributary channel sand body,estuary bar sand body and coastal beach bar sand body are identified,and three vertical superposition modes are identified:cut stack type,splicing type and isolated type.The sedimentary period of Shan 1 Member in Qingtan 1 Well Area is mainly meandering river delta front,with weak hydrodynamic force and low sand carrying energy of river,forming a sedimentary model of meandering river delta with gentle slope near source.The results provide a reference for the study of reservoir internal configuration and the fine description of gas reservoir in Longdong Area.
作者
张雷
余威
陈江萌
张建伍
马占荣
井向辉
ZHANG Lei;YU Wei;CHEN Jiangmeng;ZHANG Jianwu;MA Zhanrong;JING Xianghui(National Engineering Laboratory for Exploration and Development of Low-Permeability Oil and Gas Fields,Xi'an,Shaanxi 710018,China;Research Institute of Exploration and Development,Changqing Oilfield Branch Company of PetroChina,Xi'an,Shaanxi 710018,China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu University of Technology,Chengdu,Sichuan 610059,China;Second Gas Production Plant of Changqing Oilfield Branch Company,PetroChina,Yulin,Shaanxi 719000,China)
出处
《东北石油大学学报》
CAS
北大核心
2020年第6期70-81,93,I0005,共14页
Journal of Northeast Petroleum University
基金
国家科技重大专项(2016ZX05046-005)。
关键词
岩相
构型界面
储层构型
构型模式
山1段
庆探1井区
鄂尔多斯盆地
lithofacies
architecture interface
reservoir architecture
architecture model
Shan 1 Member
Qingtan 1 Well Area
Ordos Basin
