江陵凹陷江口洼陷新沟嘴组烃源潜力评价

Evaluation of Hydrocarbon Source Potential of Xingouzui Formation in Jiangkou Depression of Jiangling Depression

利用类比分析地震相、沉积充填及地化指标的研究方法,分析江口洼陷及周缘古地貌特征、构造演化及沉积体系,认为生烃区域分布在江口洼陷中心一带,纵向上主力烃源层段集中在新沟嘴组下段Ⅱ油组,烃源岩有机质丰度较好,具有五大勘探潜力区,能形成构造、构造-岩性、坡折岩性、潜山、地层等类型油藏。

Based on the research methods such as seismic facies analyzing by analogy,the sedimentary filling and geochemical index,this paper analyzes the Jiangkou Depression and periphery palaeogeomorphologic features,tectonic evolution and sedimentary system,and considers that the hydrocarbon generation area is distributed in the central area of Jiangkou Depression.In the longitudinal direction,the main hydrocarbon source strata are concentrated in the second oil formation of the lower member of Xingouzui Formation where the source rocks have good organic matter abundance and there are five exploration potential areas,which can form the reservoirs such as tectonic type,tectonic-lithologic type,slope folding lithologic type,buried hill type and formation type.