川西拗陷中段东坡须二段地震层序特征  

Seismic sequence character of Xu-2 member at east slope in the middle part of Chuanxi sag

作　　者：李刚[1] 欧奎 贾霍甫[1] 付菊[1] 

机构地区：[1]中国石化西南油气分公司勘探开发研究院,四川成都610081

出　　处：《油气藏评价与开发》2016年第2期1-5,共5页Petroleum Reservoir Evaluation and Development

基　　金：国家科技重大专项子课题"四川盆地碎屑岩层系有利勘探区带与重点目标"(2011ZX05002-004-001)

摘　　要：川西拗陷上三叠统须家河组二段具有良好的油气勘探前景,但该区储层非均质性强,相变迅速,且钻井较少,严重制约了该区油气勘探进程。综合测井、岩性等资料,通过识别特殊的地震反射结构,将研究区须二段划分为两个四级地震层序(地震层序A、B)。在地震层序格架基础上,识别并划分出平行—亚平行席状地震相、前积相、充填地震相,其中前积相和充填地震相解释为三角洲前缘沉积水下分流河道,是本区储层发育最有利的沉积相带。在本研究成果基础上部署的HL1井在须二段获得的工业油气流,证实了研究成果的准确性。Xu-2 member of Upper Triassic in Chuanxi sag has good oil and gas exploration prospect, however, in this area, the res- ervoir has strong heterogeneity, less drilling wells and rapidly changing phases, thereby seriously restricting oil and gas exploration process. According to well logging and lithology data, and through identifying special seismic reflection configuration, Xu-2 mem- ber was divided to two fourth seismic sequences, namely seismic sequence A and B. Based on seismic sequence fiame, this area was classified into parallel to sub parallel sheet seismic phases, progradation seismic phases and filling seismic phases, among them, progradation seismic phases and filling seismic phases were subsea distributaries＇ channels of delta front sediment, and they were the most advantageous sedimentary phase behs, moreover, the industrial hydrocarbon flows exploited from well HL 1 proved the accuracy of the research.

关 键 词：地震层序 须家河组 地震相 川西拗陷中段 

分 类 号：P631.445[天文地球—地质矿产勘探]