北部湾盆地WZA区流一上亚段源-汇分析及沉积相展布  

Source-sink analysis and sedimentary facies of the first member of Liushagang Formation in WZA area,Beibuwan Basin

作　　者：张辉 吴子瑾 周伟 于兴河[2] 孙乐[2] 胡勇[2] 谭程鹏[2] ZHANG Hui;WU Zijin;ZHOUWei;YU Xinghe;SUN Le;HU Yong;TAN Chengpeng(Zhanjiang Branch,CNOOC Ltd.,Zhanjiang 524057,Guangdong,China;School of Energy Resources China University of Geosciences,Beijing 100083,China)

机构地区：[1]中海油(中国)有限公司湛江分公司,广东湛江524057 [2]中国地质大学(北京)能源学院,北京100083

出　　处：《岩性油气藏》2017年第5期55-66,共12页Lithologic Reservoirs

基　　金：国家"十三五"重大科技专项子课题"中国近海富烃凹陷优选与有利勘探方向预测"(编号:2016ZX05024-002-002)资助

摘　　要：涠西南凹陷WZA区主要目的层流沙港组一段沉积体系类型及相应的展布规律认识不清,砂体的连续性和对比性均较差,给油气勘探带来了困难。结合岩心、测井和地震资料,通过源-汇分析确定沉积体系和沉积微相类型。WZA区为中间低、四周高的汇水区,可识别出3个不同方向的物源(NWW向、SWW向、SEE向)、2种沉积体系(西部和南部发育曲流河三角洲沉积体系,东部发育浊积扇沉积体系)和10余种沉积微相。这些认识有利于刻画WZA油田,WZB油田,WZC油田,WZD油田和WZE油田的"甜点"储层。There is no clear understanding of the types and distribution of sedimentary system of the first member of Liushagang Formation,which is major oil exploration target in WZA area of Weixinan Sag,Beibuwan Basin.It is difficult to correlation of continuity of sand bodies for further oil exploration.Combined with core,logging and seismic data,sedimentary system and sedimentary microfacies types were determined by the method of source-sink analysis.Three provenances,two types of sedimentary system and over ten types of sedimentary microfacies are identified in WZA area.The WZA is a catchment area around three provenances from direction of NWW,SWW and SEE.The meandering river delta sedimentary system developed in western and southern WZA,and turbidite fan sedimentary system developed in eastern WZA.The result is helpful for sweet reservoir characterization in oilfields of WZA,WZB,WZC,WZD and WZE.

关 键 词：流沙港组 源-汇分析 浊积扇 曲流河三角洲 涠西南凹陷 

分 类 号：TE121.3[石油与天然气工程—油气勘探]