Title

HYDROCARBON EXPLORATION POTENTIAL ANALYSIS OF THE LOWER MARINE FORMATION ASSEMBLAGE IN THE LOWER YANGTZE REGION

作者

张淮周荔青李建青

Authors

Zhang Huai Zhou Liqing Li Jianqing

单位

西北大学, 地质系, 西安, 710069 2. 中国科学院, 地质与地球物理研究所, 北京, 100029 3. 中国石油化工股份公司, 华东分公司, 南京, 210011

Organization

Department of Geology, Northwest Universty, Xi'an, Shaanxi 710069, China 2. Institute of Geology and Geophysics, Chinaese Academy of Sciences, Beijing 100029, China 3. East China Subsidiary Company, SINOPEC, Nanjing, Jiangsu 210011, China

摘要

通过对下扬子地区"海相下组合"构造背景、生储盖发育、演化、保存以及典型实例的剖析,认为下扬子盆地北部中新生代叠置区"海相下组合"烃源岩具备长期生烃、多期次生烃的条件,同时该地区志留系高家边组大套海相泥页岩构成良好的油气封盖层。进一步研究认为,下扬子地区是印支期拼合到欧亚大陆的古板块,古板块的主体部分是历次构造运动的相对稳定区,即下扬子中央稳定带,此中央稳定带位于盐城—南黄海一带的广大区域,是下扬子区"海相下组合"油气勘探的有利区。

Abstract

Based on the analysis of the tectonic setting,source-reservoir-caprock development,evolution and preservation as well as some typical examples of the Lower Marine Assemblage,it is considered that the source rock in the Lower Marine Formation Assemblage in the Meso-Cenozoic superposted area in the north of Lower Yangtze basin is characterized by long-term and multiperiodic hydrocarbon-generating.Moreover,the Silurian Gaojiabian Formation being composed of thick marine mud shale is a good caprock.Further research shows that the Lower Yangtze area is a fossil plate spliced to the Eurasia in Indo-Chinese epoch.The main body of the fossil plate is a relatively steady zone called Lower Yangtze central steady zone.This central steady zone is situated in Yancheng to South Yellow Sea region.It is a potential exploration area in the Lower Marine Formation Assemblage in Lower Yangtze region.

关键词：

油气潜力; 中新生代叠置区; 中央稳定带; 海相下组合; 下扬子区;

Keywords:

hydrocarbon exploration potential; Meso-Cenozoic superposted area; central steady zone; the Lower Marine Formation Assemblage; the Lower Yangtze region;

基金项目

DOI

https://doi.org/10.11781/sysydz200601015

下扬子地区海相下组合油气勘探潜力分析