东海盆地西湖凹陷平湖—黄岩地区花港组上二亚段高分辨率层序地层分析  

HIGH-RESOLUTION SEQUENCE STRATIGRAPHY OF THE SECOND-UPPER SUBMEMBER OF HUAGANG FORMATION IN THE PINGHU-HUANGYAN AREA OF THE XIHU SAG IN THE EAST CHINA SEA BASIN

作　　者：付振群 赵军[1] 周瑞琦[2] 邱汇洋 姜经帅 孟佳佳[1] 

机构地区：[1]中海油田服务股份有限公司,河北廊坊065201 [2]成都理工大学,四川成都610059

出　　处：《地层学杂志》2015年第4期416-422,共7页Journal of Stratigraphy

基　　金：中海油上海有限公司项目资助

摘　　要：以钻井岩芯、测井及地震等资料为基础,对东海盆地西湖凹陷花港组上二亚段进行高分辨率层序地层学研究。依据层序界面将目的层划分为1个长期、4个中期及若干个短期旋回。以长期旋回建立层序格架,以中期旋回为等时对比单元,分析研究上二亚段沉积演化规律。在此基础上,以中期旋回为编图单元,绘制上二亚段层序—岩相古地理图,揭示MSC1期为三角洲发育初期,MSC2、MSC3、MSC4为三角洲高度建设期,发育大型分流河道及水下分流河道、水下天然堤、河口坝、远砂坝,是研究区有利勘探目标,通过对上二亚段层序格架内砂体展布和岩相古地理研究对下一步油气勘探具有重要意义。Based on the analysis of drill cores,well logs,and seismic data,this paper presents a high-resolution sequence stratigraphic study of the upper second submember of the Huagang Formation in the Xihu Sag in East China Sea.One long-term cycle,four mid-term cycles,and a number of short-term cycles were recognized.A high-resolution sequence stratigraphic framework was established on the basis of mid-term cycles.A paleogeographic map was generated using the mid-term cycles as mapping units.The mid-term cycle MSC1 represents initial stage of delta development.Mid-term cycles MSC2,MSC3,and MSC4 represent peak development of deltas,characterized by large-scale diversion tributaries,underwater distributary channels,underwater levees,and mouth bars.The spatial distribution patterns of these sand bodies as revealed by sequence stratigraphic,lithofacies,and paleogeographic analysis can be used to guide petroleum exploration.

关 键 词：高分辨率层序地层 层序-岩相古地理 基准面旋回 花港组 古近系 西湖凹陷 东海盆地 

分 类 号：P539.2[天文地球—古生物学与地层学] P534.61[天文地球—地质学]