南海北部边缘盆地CO_2形成的地质条件及主控因素  

Geologic Conditions and Controlling Factors of CO_2 in the North Marginal Basins of South China Sea

作　　者：陈胜红[1,2] 贺振华[1] 朱明 陈雪芳 祝有海[3] 黄霞[3] 姜建 

机构地区：[1]成都理工大学,四川成都610059 [2]中海石油有限公司深圳分公司研究院,广东广州510240 [3]中国地质科学院矿产资源研究所,北京100037

出　　处：《天然气地球科学》2009年第5期720-729,共10页Natural Gas Geoscience

基　　金：国家重点基础研究发展计划项目(编号:2007CB411705012009CB219501)联合资助

摘　　要：南海北部边缘盆地CO2资源丰富,CO2成因类型主要属壳源型、壳幔混合型和火山幔源型,这些不同成因CO2的形成主要取决于具体的地质条件及控制因素。由于盆地所处地质背景、地质属性和结构类型的差异,导致不同地区的油气、CO2运聚规律与形成的地质条件及主控因素均明显不同。壳源型和壳幔混合型CO2富集于西北边缘莺歌海走滑伸展型盆地,受控于海相含钙砂泥岩与泥底辟热流体上侵活动的物理化学综合作用;火山幔源型CO2则主要展布于东北边缘琼东南及珠江口断陷裂谷盆地,其火山幔源岩浆脱排气活动与深大断裂导气输送作用的配置,控制了这种类型CO2的运聚乃至富集成藏过程。There are rich sources of CO2 in the marginal basins in the northern of the South China Sea. The genetic types are crustal original, crustal-mantle original,and volcano-mantle original one, due to geologic conditions and controlling factors. The different geologic conditions and controlling factors to the accumu lation and migration of CO2 and oil gas among different areas result from the different geological settings and characteristics. Crustal original and crustal-mantle original type are located at the Yinggehai basin of the northwest margin and controlled by the diapirs up-invasion and thick marine calcic sand shales. Volcano-mantle original type is most located at the Qiongdongnan basin of the northeast margin and the Pear River Delta. Furthermore, the accumulation and migration of CO2 and oil gas of these types of CO2 are controlled by the exhaustion of mantle magma and the transportation of discordogenic faults.

关 键 词：南海北部边缘盆地 盆地结构类型 CO2形成条件 成藏控制因素 

分 类 号：TE122.1[石油与天然气工程—油气勘探]