鄂尔多斯盆地演武地区中侏罗统直罗组沉积相  

Sedimentary facies of Middle Jurassic Zhiluo Formation in Yanwu area,Ordos Basin,China

作　　者：缪宗利 朱莉娟 侯明才[1] 陈安清[1] 罗文[1] 石鑫 王海红 刘一仓 王联国 侯长冰 郭小军 郭京蜇 邵晓岩[4] MIAO Zongli;ZHU Lijuan;HOU Mingcai;CHEN Anqing;LUO Wen;SHI Xin;WANG Haihong;LIU Yicang;WANG Lianguo;HOU Changbing;GUO Xiaojun;GUO Jingzhe;SHAO Xiaoyan(State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu University of Technology,Chengdu 610059,China;2.Jiangxi Provincial Institute of Nuclear Geology(Jiangxi Nuclear Geological bureau 266th Brigaded),Nanchang 330038,China;Eleventh Oil Production Plant,Changqing Oilfield Branch Company of PetroChina,Qingyang 745000,China;Third Oil Production Plant,Changqing Oil field Branch Company of PetroChina,Yinchuan 750006,China)

机构地区：[1]油气藏地质及开发工程国家重点实验室(成都理工大学),成都610059 [2]江西省核工业地质调查院(江西省核工业地质局266大队),南昌330038 [3]中国石油长庆油田分公司第十一采油厂,甘肃庆阳745000 [4]中国石油长庆油田分公司第三采油厂,银川750006

出　　处：《成都理工大学学报（自然科学版）》2018年第2期166-176,共11页Journal of Chengdu University of Technology: Science & Technology Edition

基　　金：国家科技重大专项(2016ZX05050)

摘　　要：为查明鄂尔多斯盆地西南部演武地区中侏罗统直罗组沉积相及砂体发育分布规律,在露头剖面实测、钻井岩心观察、测井资料解释和薄片鉴定的基础上,对直罗组进行了小层划分对比和沉积相分析,提出了小层划分方案,确立了沉积相类型及优势相划分标准,编制了岩相古地理图,建立了直罗组由辫状河-辫状河三角洲转变为曲流河三角洲沉积环境的沉积演化模式。基于精细小层划分的沉积相研究揭示了直罗组砂体发育的优势相带分布及变迁,是潜在的油气储层和砂岩铀矿发育的新层系。Based on the analyses of outcrop section measurement,drilling core observation,logging data interpretation and thin section identification,stratigraphic correlation and sedimentary facies analysis,the distribution of sedimentary facies and sand bodies in the Middle Jurassic Zhiluo Formation in the southwestern Ordos Basin are studied.The subdivision of the 4th and 8th Member of the Middle Jurassic Zhiluo Formation in the Ordos Basin is proposed,and the classification of sedimentary facies and dominant phase of the Zhiluo Formation are established.The sedimentary evolution model of the 8th sub-sections of Zhiluo Formation in Yanwu area is characterized by the sedimentary environments of braided river-braided river delta to the meandering river delta.This study has unraveled the distribution and change of dominant facies belt of the Zhiluo Formation sand bodies?and proved that the Zhiluo Formation sand bodies are potential targets for oil and gas reservoir and sandstone uranium deposit.

关 键 词：鄂尔多斯盆地 演武地区 中侏罗统 直罗组 沉积相 

分 类 号：P534.52[天文地球—古生物学与地层学]