许庄地区 T33地震波组特征及形成机理

摘要

T3 3 reflecting layer is the geological interface between the main exploration layers of E 1 f2 and E1 f1 in Gaoyou Sag,and also the important seismic layer of E 1 f1 structural trap.The basic characteristics of its reflection wave group are three strong phases .The drilling practice in Xuzhuang area proved that reflection characteristics of T 3 3 seismic wave in the area had been changed .Combined with the knowledge of geology ,the forward modeling technique was used to research the characteristics and formation mechanism of T 3 3 reflection wave group in Wazhuang and Xuzhuang area of Gaoyou Sag .The formation mechanism of T 3 3 seismic reflection standard layer in Xuzhuang was defined ,and the corresponding relationship between the lithologic features and the seismic reflection characteristics was built .The research can provide theoretical ba-sis for the structure interpretation and trap description of the area .%T33地震反射标志层是高邮凹陷阜宁组主要勘探目的层系阜一段与阜二段的地质分界面，是描述阜一段构造圈闭的重要地震标准层，反射波组的基本特征是三个强相位。许庄地区的钻探实践证实该地区T33地震波组特征发生了改变。结合地质认识，利用正演模拟技术开展了高邮凹陷瓦庄及许庄地区T33波组特征研究，明确了许庄T33地震反射标准层的形成机理，建立了许庄地区地层岩性组合特征与地震反射特征的对应关系，为构造解释和圈闭描述提供了理论依据。