东营凹陷东部古近系沙河街组四段纯上亚段沉积体系  

DEPOSITIONAL SYSTEM OF CHUNSHANG SUB-MEMBER OF MEMBER IV IN SHAHEJIE FORMATION IN EASTERN PALEOGENE OF DONGYING SAG

作　　者：赵伟[1] 陈妍[2] 邱隆伟[3] 许磊[4] 杨勇强[3] 

机构地区：[1]中国地质大学能源学院,北京100083 [2]中国石化胜利油田有限公司物探研究院,山东东营257022 [3]中国石油大学地球资源与信息学院,山东东营257061 [4]中国石油勘探开发研究院软件中心,北京100083

出　　处：《大庆石油地质与开发》2011年第3期32-38,共7页Petroleum Geology & Oilfield Development in Daqing

基　　金：基金项目：国家科技重大专项（2009ZX05009-002）资助.

摘　　要：随着勘探的不断深入，沙四段地层成为东营凹陷新的重要含油气层位，纯上亚段是沙四段顶部的一套以灰绿色砂泥岩互层为特征的地层单元。通过对岩心、测井、录井及地震多种相标志的研究，识别出了三角洲相、湖底扇相、近岸水下扇相、滩坝相等多种沉积相类型。在地层精细划分的基础上，利用物源分析、砂泥岩统计等方法确定了每个砂组各沉积体系的展布范围，并通过砂组之间的对比，恢复了沉积体系的演化历史。研究认为，整个沙四段纯上亚段沉积时期东营凹陷东部发育的主要沉积体经历了由东南部广饶凸起物源控制为主到东北部青坨子凸起物源控制为主的演化过程。Along with continuous and further exploration, Sha4 Member has become the newly important oil-gas bearing horizon in Dongying Sag, and Chunshang Sub-member is the formation unit in the top of Sha-4 Member characterized by a set of gray-green sand shale interbed. Through the study on multi facies marks, such as core, well logging, logging and seism, many sedimentary facies types （ delta, sublacustrine fan, inshore subsea apron, and beach bar） have been indentified. On the basis of fine formation division, methods including source analysis, sand shale statistics and so on are used to determine the distribution range of all sedimentary systems in each sandstone group, and the evolutional history of sedimentary system has been resumed through the comparison between sandstone groups. According to the research it is believed that the mainly developed sedimentation body in eastern Dongying Sag during the sedimentation of Chunshang Sub-member of the whole Sha-4 Member has experienced the evolutional process from taking the Guangrao uplift source control as the dominant factor in the southeast to taking the Qingtuozi uplift source control as the dominant factor in the northeast.

关 键 词：沉积体系 演化历史 物源分析 东营凹陷 沙四段 

分 类 号：TE121.3[石油与天然气工程—油气勘探]