基于砂砾质辫状河沉积露头隔夹层研究  

A Study on Intercalation of Sand-gravel Braided River Deposit Based on Outcrop Section

作　　者：印森林[1,2] 吴胜和[1] 陈恭洋[2] 白凯[2] 曾建宏[3] 

机构地区：[1]中国石油大学(北京)地球科学学院,北京昌平102249 [2]长江大学计算机科学学院,湖北荆州434023 [3]中国石油大港油田公司勘探开发研究院,天津大港300280

出　　处：《西南石油大学学报（自然科学版）》2014年第4期29-36,共8页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：国家重大科技专项(2011ZX05030–005–02;2011ZX05009–003)

摘　　要：以准噶尔盆地西北缘扎伊尔山出露的三叠系克拉玛依组黑油山沟35剖面为例,利用岩相组合和层次界面分析方法,结合沉积学理论,探讨了砂砾质辫状河岩石相组合、构型界面及构型单元级次,进而研究砂砾质辫状河河道砂体内部隔夹层的成因、级次、形态、规模及其控制下的渗流地质差异特征。结果表明,在研究区可以识别8种典型岩相,8个5级储集体构型单元以及2个3级储集体构型单元。泥质隔夹层主要分为细粒沉积和泥砾型两种类型,泥砾型隔夹层主要发育在河道底部泥砾岩沉积,由河道侵蚀河岸或河底的泥岩快速堆积而成,主要分布在5级或3级界面之上,向河道两侧边缘减薄尖灭。同时,内部不同级次的泥质隔夹层控制了储层非均质。Based on Triassic Karamay Formation outcrop of 35 profiles in Heiyoushan, which is located in the Zaire Mountain, northwestern of Junggar Basin. The lithofacies associations, architecture boundaries and hierarchy of architecture units are discussed by using lithofacies associations and hierarchy interface analysis methods, combined with sedimentary theory. Then, the origin, hierarchy, morphology as well as scale of intercalation in the sand-gravel braided river are analyzed, The results show that eight typical lithofacies which can be divided into eight fifth hierarchy architecture units and two third hierarchy architecture units are recognized. While the muddy intercalation is mainly divided into fine type and mud boulder type. Different level architecture units were identified in the fine grained type deposits. The mud boulder type intercalation chiefly develops in the bottom of channel, formed by the rapid sediment of mud which was caused by the erosion of bank and river bottom. It principally distributes on fifth or third hierarchy surface, pinching out toward both sides of channel. At the same time, internal intercalation of the different hierarchy controlled reservoir heterogeneity.

关 键 词：砂砾质辫状河 露头 隔夹层 克拉玛依组 准噶尔盆地西北缘 

分 类 号：TE132[石油与天然气工程—油气勘探]