江陵凹陷荆沙组地层剥蚀厚度恢复探讨  

Recovery of Eroded Strata Thickness of Jingsha Formation in Jiangling Depression

作　　者：陈晓辉[1] 何幼斌[1] 王永军[2] 陈长江[2] 陈金荣[2] 刘亚伟[2] 

机构地区：[1]长江大学地球科学学院,湖北荆州434023 [2]江汉油田研究院,湖北潜江433124

出　　处：《长江大学学报（自科版）（上旬）》2010年第4期48-52,共5页JOURNAL OF YANGTZE UNIVERSITY (NATURAL SCIENCE EDITION) SCI ＆ ENG

摘　　要：在研究江陵凹陷荆沙组剥蚀面的形成和特点后,根据江陵凹陷断层发育和火成岩分布广泛的地质特征,将镜质体反射率法和地震剖面直观几何比例法相结合,对荆沙组的地层剥蚀厚度进行恢复。用镜质体反射率法对区内单井分析,获得地震剖面直观几何比例法的起算点和约束点,与相交剖面的地层剥蚀厚度闭合,得到其剥蚀量。研究表明,斜坡带、背斜带剥蚀厚度较大;剥蚀作用以南强北弱、西强东弱为特点。Through study of formation and characteristics of erosion surface of Jingsha Formation in Jiangling Depression,according to the geological features of Jiangling Depression,mature fault and igneous rocks are widely distributed,the eroded strata thickness of Jingsha Formation is recovered:the combination of vitrinite reflectivity method and seismic profiles intuitive geometric scaling method are used.The starting point and the constraint point are obtained by analyzing the single well of the region with vitrinite reflectance method,which is closed with the eroded strata thickness of the intersection profile,to derive the erosion volume.The research shows that the eroded strata thickness of slope belt and anticlinal zone is higher;denudation is characterized by south rather than the north,west rather than east.

关 键 词：江陵凹陷 荆沙组 剥蚀作用 剥蚀厚度 

分 类 号：TE121.11[石油与天然气工程—油气勘探]