松北宾县断陷白垩系沙河子组沉积相与生储盖组合分析  

The sedimentary facies studying of the Shahezi Formation of Mesozoic in Binxian fault subsidence of the north of Songliao Basin

作　　者：马洪[1] 辛仁臣[2] 刘豪[2] 朱立林[3] 石金华[3] 詹宁[4] 吴文波[5] 

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]中国地质大学海洋学院,北京100083 [3]青海油田分公司采油厂,青海敦煌816400 [4]吐哈油田钻井三公司,新疆鄯善838200 [5]大港油田井下技术服务公司国际工程部,天津300283

出　　处：《地质科学》2011年第2期518-529,共12页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：国家自然科学基金项目"大型坳陷湖盆坡折带的构造一古地貌一剥蚀沉积响应耦合"(编号:40272057)资助

摘　　要：通过野外露头、岩心观察描述和地震相分析,结合测井、录井、分析化验资料综合分析结果表明,宾县断陷中生界沙河子组主要发育4种类型的沉积相:扇三角洲相、湖泊相、河流相和湖底扇相。沙河子组湖侵体系域主要发育4种类型的地震相,对应的沉积相类型有扇三角洲相、湖泊相、和湖底扇相;沙河子组高水位体系域也发育4种类型的地震相,对应的沉积相类型有扇三角洲相、湖泊相和冲积平原。分析研究了湖侵体系域和高水位体系域沉积相的平面展布形态。通过对宾参1井的样品分析,研究了沙河子组的生、储、盖条件,结合其沉积特征分析,预测了研究区圈闭发育的有利相带:东部受边界断裂和次级断裂的控制,形成河流、扇三角洲沉积,主要是断块圈闭气藏和基岩潜山圈闭气藏的有利勘探相带;西部为断层复杂化的挠曲边坡,以滨浅湖沉积为主,是地层超覆圈闭、不整合遮挡岩性圈闭、断块圈闭、断层—背斜构造圈闭、断层—岩性圈闭、岩性圈闭气藏勘探的有利相带。It was concluded that there were four styles of sedimentary facies in the Shahezi Formation of Mesozoic in Binxian fault depression through the data of multidisciplinary analysis about the field exposure, the drilling core observation and description, the seismic facies studying, the drilling-well logging and the laboratory test. They were fan-delta facies, lacustrine facies, river facies and sublacustrine fan respectively. Four styles of the seismic facies in transgressive system tract of Shahezi Formation were developed which were corresponded with three types of sedimentary facies：fan-delta facies,lacustrine facies and sublacustrine fan. There were also four styles of the seismic facies in highstand system tract of Shahezi Formation which were corresponded with three types of sedimentary facies：fan-delta facies, lacustrine facies and river facies also. Then analyzed the plane distributed shape of the sedimentary facies in highstand system tract and transgressive system tract separately. It was predicted the favorable trap areas through the studying of the oil source rock, reservoir rock, cap rock, the sedimentary character and the analyzing of the sample in Bincan 1 well. The eastern which was controlled by the boundary fault and the secondary fault was the fault block trap and the basement hydrocarbon trap favorable area which was developed the fan-delta facies and river facies. The western which was controlled by the flexure was the overlap trap, the unconformity-lithologic trap, the fault block trap, the fault-anticline trap and the fault-lithologic trap favorable area which was developed the lacustrine facies.

关 键 词：沙河子组 扇三角洲 冲积平原 湖侵体系域 地震相 

分 类 号：P539.1[天文地球—古生物学与地层学] P631.4[天文地球—地质学]