渤海海域庙西中南洼围区优质烃源岩分布及其控油气作用  

Distribution of high quality source rocks and its control on oil andgas in central-south sag of Miaoxi Depression,Bohai Sea,China

作　　者：孙哲 于海波 彭靖淞 叶涛 李飞 蔡冬梅 SUN Zhe;YU Haibo;PENG Jingsong;YE Tao;LI Fei;CAI Dongmei(Tianjin Branch,CNOOC China Ltd.,Tianjin 300459,China;Engineering Tech-Drilling&Production Company,CNOOC Energy Technology&Service Ltd.,Tianjin 300459,China)

机构地区：[1]中海石油(中国)有限公司天津分公司渤海石油研究院,天津300459 [2]中海油能源发展股份有限公司工程技术分公司,天津300459

出　　处：《成都理工大学学报（自然科学版）》2020年第6期652-660,共9页Journal of Chengdu University of Technology: Science & Technology Edition

基　　金：中海油“十三五”油气资源评价项目(YXKY-2018-KT-01)。

摘　　要：研究渤海海域庙西中南洼围区优质烃源岩展布规律、原油成因类型及分布规律。基于地球化学、测井以及区域地震资料,对庙西中南洼围区优质烃源岩的展布特征进行了刻画。结合油-源对比分析以及油源断层活动性分析,探讨优质烃源岩的展布对原油类型分布的控制作用。结果表明,黄河口东洼东部、庙西中南洼南次洼、莱州湾东北洼均发育沙三段优质烃源岩,沙四段优质烃源岩主要分布于庙西中南洼南次洼。研究区原油可分为沙三型、沙四型和混源型3类。沙三型原油主要分布于蓬莱25区和垦利6-4区,主要受优质烃源岩控制;混源型和沙四型原油主要分布于蓬莱31区和渤中36区,受油源断裂和优质烃源岩联合控制。Based on geochemical,well logging and regional seismic data,combined with the oil-source correlation analysis and the activity analysis of oil-source faults,the distribution characteristics of high-quality source rocks in the central south of Miaoxi area are described so as to unravel the distribution law of high-quality source rocks and genetic type,and distribution law of crude oil,and to discuss the control of the distribution of high-quality source rocks on the distribution of crude oil types in the study area.The results show that the high-quality source rocks of the E s 3 are mainly distributed in the south of central-south sag of Miaoxi Depression and in the junction of eastern subsag of Huanghekou sag and central-south sag of Miaoxi Depression,while the high-quality source rocks of E s 4 are mainly distributed in the south subsag of central south sag of Miaoxi Depression.There are 3 types of crude oil in the study area,including E s 3 type,E s 4 type and mixed type.E s 3 type crude oil is mainly distributed in Penglai 25 area and Kenli 6-4 area,which is mainly controlled by high-quality source rock.The mixed type and E s 4 type crude oil are mainly distributed in Penglai 31 area and Bozhong 36 area,which are jointly controlled by the oil-source faults and high-quality source rock.

关 键 词：烃源岩 测井评价 油-源对比 庙西中南洼 渤海海域 

分 类 号：TE122.115[石油与天然气工程—油气勘探]