电成像测井技术在北部湾盆地乌石凹陷流沙港组沉积相研究中的应用  

Application of Electroimaging Logging technology in Sedimentary Facies Study of Liushagang Formation in Wushi Sag,Beibuwan Basin

作　　者：徐万兴 何卫军 刘娟 刘芳 焦祥燕 XU Wan-xing;HE Wei-jun;LIU Juan;LIU Fang;JIAO Xiang-yan(Zhanjiang Branch of CNOOC Ltd.,Zhanjiang,Guangdong 524057;Hainan Branch of CNOOC Ltd.,Haikou,Hainan 570100)

机构地区：[1]中海石油(中国)有限公司湛江分公司,广东湛江524057 [2]中海石油(中国)有限公司海南分公司,海南海口570100

出　　处：《四川地质学报》2023年第1期163-167,共5页Acta Geologica Sichuan

摘　　要：北部湾盆地乌石凹陷是已证实的富生烃凹陷,同时也是南海北部大陆架油气勘探的主战场之一。自勘探以来先后发现了多个含油气构造,流沙港组为主要勘探层系,该层系断裂体系复杂,沉积相变快,给油气的勘探和开发工作来带了很大困难。通过利用电成像测井资料高纵向分辨率、高井眼覆盖率的特点,首次在乌石凹陷开展成像测井与沉积相分析的综合研究,通过精确地识别钻井岩性,并根据电成像所蕴含的丰富地质信息,识别了多种沉积构造,建立了多种沉积微相识别模式,同时还对研究区重点区带的古水流方向进行了分析。研究成果对该区流沙港组沉积演化、物源方向分析起到了重要作用,对下一步油气勘探也具有一定指导意义。Wushi Sag has been proved to be the rich hydrocarbon generation sag in Beibuwan Basin,and is also one of the main oil-gas explorationfields in the northern shelf of the South China Sea.Many oil-gas structures have been discovered since exploration,Liushagang Formationis the major exploration series of strata,its fracture system is complex and sedimentary facies change fast,which has brought great difficulties to oil-gas exploration and development.Based on the characteristics of high vertical resolution and hole coverage of electricity imaging logging data,a comprehensive research about the analysis of electroimaging logging and sedimentary facies in Wushi Sag.Drilling lithology was identified accurately.According to the abundantgeology mfbrmation contained byelectroimaging data,multiple sedimentary structures were recognized,multiple recognition models of sedimentary microfacies were built,paleocurrent directions of the important exploration plays were studied.The research results play an important role in the analysis of sedimentary evolution and provenance direction of Liushagang Formation in this area,and also have a certain guiding significance for the next oil and gas exploration.

关 键 词：电成像测井 沉积构造 沉积微相 古水流方向 流沙港组 乌石凹陷 

分 类 号：P631.81[天文地球—地质矿产勘探]