江汉盆地为燕山运动后发展起来的中、新生代内陆盆地。面积约28,000平方公里。自垩纪到第四纪沉积总厚达万米左右。以早第三纪沉积最为发育,可分两个成油、成盐旋回(表1)。本文讨论新沟咀组下段“上组合”(包括泥隔层、Ⅱ油组、Ⅰ油组和大膏层)的沉积环境及其与油气的关系。 Jianghan Basin Yanshan movement developed after the Mesozoic Cenozoic inland basin. An area of ​​about 28,000 square kilometers. From the Cretaceous to the Quaternary sedimentary total thickness of about 10,000 meters. In the early Tertiary sediments most developed, can be divided into two oil, salt rotation (Table 1). This paper discusses the sedimentary environment and its relationship with hydrocarbon in the “upper combination” of the lower part of the Xingouzui Formation (including mud compartment, oil group Ⅱ, oil group Ⅰ and large plaster).