潜江凹陷位于江汉盆地中部,其构造位置如图1所示.1958年以来,地质部、石油部和有关院校作了大量的物探、钻探和地质研究工作.初步查明凹陷在中、古生代灰岩的基底上沉积了上万米的白垩—第三系陆相地层,并在下第三系中发现了潜江组和新沟咀组两个主要石油勘探目的层,找到了若干油田.本文的目的在于用地震地层学的方法,重新认识原有的某些结论,提出一些新的看法,供交流、讨论. Qianjiang Sag is located in the middle of Jianghan Basin and its tectonic location is shown in Fig. 1. Since 1958, a great deal of geophysical exploration, drilling and geological research have been done by the Ministry of Geology, Ministry of Petroleum and relevant institutions. On the limestone basement, tens of thousands of meters of Cretaceous-Tertiary continental facies were deposited, and in the Lower Tertiary two major oil exploration target layers of the Qianjiang Formation and the Xingouzui Formation were discovered and several oil fields were found. The purpose is to re-recognize some of the original conclusions by using the method of seismic stratigraphy and put forward some new ideas for exchange and discussion.