东海陆架盆地地震层序特征及地质属性  

CHARACTRISTICS OF SESMIC SEQUENCES IN THE EAST CHINA SEA SHELF BASIN AND THEIR GEOLOGICAL ATTRIBUTES

作　　者：王文娟[1,2] 李刚[1,2] 杨长青[1,2] 杨传胜[1,2] 

机构地区：[1]国土资源部海洋油气资源与环境地质重点实验室,青岛266071 [2]青岛海洋地质研究所,青岛266071

出　　处：《海洋地质与第四纪地质》2013年第3期117-122,共6页Marine Geology & Quaternary Geology

基　　金：国土资源部海洋油气资源与环境地质重点实验室开放基金项目(MRE201219);全国油气资源战略选区调查与评价国家专项项目(2009GYXQ05-01)

摘　　要：应用SYNTRAK-480型高分辨率数字地震仪对东海陆架盆地地层进行了探测研究。通过全区地震资料的解释,根据地震反射波及反射界面特征,共识别出T02、T03、T04、T05、T06和Tg等6个反射界面。重点对T02、T04、T05、T06和Tg反射层进行追踪对比解释,建立了统一的地震层序和地层格架。依据地震层序划分原则和方法,自上而下将基底反射界面以上的地震反射层划分为5个地震层序,即:Ⅰ(海底面—T02)、Ⅱ(T02—T05)、Ⅲ(T05—T06)、Ⅳ(T06—Tg)、Ⅴ(Tg以下)层序;其中第二地震层序可以进一部划分为两个亚地震层序Ⅱ1、Ⅱ2,经与研究区相邻海陆已知地质资料的对比分析,确定了该区5个不同地震层序的地质年代分别为Q+N、E3+E2+E1、K、J、前中生界。中生界沉积为有利勘探目的层,尤其是闽江凹陷与基隆凹陷潜力大,为油气勘探的重点区。High resolution multi-channel seismic survey is a cost-efficient technique for geological exploration.We conducted high resolution multi-channel seismic survey with the SYNTRAK-480,and studied the stratigraphical sequences in the East China Sea Basin.Based on the characteristics of seismic reflection records retrieved from the multi-channel seismic data,6 reflectors marked as T02,T03,T04,T05,T06 and Tg are recognized and 6 seismic sequences established by correlation.From the top to the bottom,they are Ⅰ（sea floor—T02）,Ⅱ（T02—T05）,Ⅲ（T05—T06）,Ⅳ（T06—Tg）andⅤ（Tg —below）,and the second sequence can be further divided to two subsequences,Ⅱ1 and Ⅱ2.Compared with the data from the adjacent sea and land areas,these seismic sequences are Q＋N,E3＋E2＋ E1,K,J and Pre-Mesozoic respectively in age.The Mesozoic deposit is a favorable oil and gas exploration target in this area,especially in the Minjiang sag and Keelung sag.

关 键 词：高分辨率地震勘探 地震层序 地质属性 中生界沉积 东海陆架盆地 

分 类 号：P315.2[天文地球—地震学]