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在苏北盆地追踪CO2迁移和积累,使用地质年代学和流体含量定量分析

Yanlong Hu¹, Ruyue Wang², Yahao Huang³

¹Key Laboratory of Exploration Technologies for Oil and Gas Resources of Ministry of Education, Yangtze University, Wuhan, 430100, China.

Scientific reports

|March 4, 2025

概括

石油盆地的二氧化碳 (CO2) 和碳化合物相互作用影响石油和天然气的形成. 这项研究量化了中国的流体进化.

科学领域:

地质化学地质化学
石油地质学石油地质学
同位素地球化学同位素地球化学

背景情况:

二氧化碳和碳化合物之间的相互作用显著影响碳化合物的产生和积累在石油盆地.
中国的黄油气库含有大量的二氧化碳储量,使其成为研究这些过程的关键地点.

研究的目的:

阐明黄油气库中无机和有机液体的时间表和来源.
量化分析甲 (CH4) 和含有二氧化碳的液体内含物的密度,组成,压力和温度.
了解二氧化碳对碳化合物积累和变化的影响.

主要方法:

在骨折中的石灰岩静脉的U-Pb同位素约会.
碳和氧同位素分析.
稀土元素 (REE) 的分析.
液体内含物的石版观测. 液体内含物的石版观测.
拉曼定量测量和热力学模拟.

主要成果:

确定了两个不同的碳化合物充电阶段:朱拉纪早期 (200185万年) 和伊欧纪早期 (6141万年).
确定了二氧化碳积累的两个阶段:早期的伊欧纪 (5939万年) 和三级-四级 (234万年).
深层流体的流入导致了热水变化,影响了水库特性和碳化合物组成.

结论:

迟进入的二氧化碳,特别是热水二氧化碳,可以提取更轻的碳化合物成分,并加速原油裂变.
这个过程改变了流体组成,增强了源岩的热演变,并影响了水库的发展.
该研究为分析类似石油盆地的地质流体提供了定量框架.

关键词:

含有CO2和CH4的流体包括在内.碳化合物积累的情况古流体活动的古流体活动保存条件保存条件保存条件拉曼定量光谱法拉曼定量光谱法

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