摘要
山东济阳坳陷CO2气藏类型众多,成藏模式存在多样性。根据CO2气藏组分含量和同位素的分析结果,发现济阳坳陷CO2气藏以幔源成因为主,岩浆气源体是最重要的CO2气源体,火山岩体、火山通道和岩浆气源体附近的断裂对CO2气的运移成藏起关键作用。通过卸压条件下CO2的运移、CO2在断裂(裂缝)中的运移、CO2在孔隙—裂缝双重介质中的运移、CO2在砂质沉积物中的运移等一系列实验模拟,研究岩浆释出CO2气的运移成藏过程。结合已知气藏的运移成藏地质过程,建立济阳坳陷CO2气藏的3种地质模式,即侵入体—断裂—储集层转折成藏模式、侵入体—储集层直接成藏模式和埋藏火山通道—储集层直接成藏模式,为济阳坳陷CO2气成藏研究及其综合勘探奠定基础。
There are many types of CO2 reservoirs, and the diversities of reservoir forming are identified in Jiyang depression, Shandong. The genesis of CO2 reservoirs was analyzed by component content and isotope analysis of CO2 reservoirs. The result shows that mantle-resource gas is the key genesis, and the magma gas source body is the most important source of the CO2. The volcanic body, volcanic conduit and the breaking near the magma gas source body played an important role in CO2 migration and reservoir forming. The processing of CO2 migration and reservoir forming were analyzed by a set of modeling experiments, such as CO2 migration under pressure release, in fissure, in porosity-fissure and in sand deposits, and combined with the given migration and forming processing to construct three reservoir-forming modes, which are intrusion-breaking-reservoir dogleg, direct intrusion-reservoir forming and direct buried volcanic conduit-reservoir forming. It lays a foundation for researching the CO2 reservoir-forming and integrated exploration in Jiyang depression.
出处
《现代地质》
CAS
CSCD
北大核心
2006年第3期441-448,共8页
Geoscience
基金
中国石油化工集团公司重点科技项目(P02066)
关键词
济阳坳陷
CO2气
气源体
火山通道
成藏地质过程
成藏模式
Jiyang depression
CO2
gas source body
volcanic conduit
geologic reservoir-forming processing
reservoir-forming mode
