二氧化碳地质埋存研究进展

Existing State about Geological Storage of Carbon Dioxide

对二氧化碳地下封存的基本地质学问题及其他相关技术进行阐述,包括地下封存的基本原理、适合的封存场所、油气藏的筛选、储存潜力估算、动态监测、安全性及环境问题、及我国二氧化碳地质储存面临的问题。二氧化碳被注入地下后,以分子状态、溶解状态和化合物状态储存于岩石孔隙中,从而得到封存;合适的封存场所包括:深部盐水层、深部煤层和枯竭的油气藏;对于气驱和水驱油藏可以分别采用不同的公式进行模拟,根据模拟结果可以得到适合埋存的油气藏条件;对于3种不同的埋存场所可以采用不同的公式计算其埋存量以评价它们的地质埋存潜力。

The article describes the fundamental geology issues and correlation techniques of carbon dioxide storage, including its basic principle, applicable storage formations, methods of selecting reservoirs, estimation of storage capacity, performance monitoring, safety and environment protection, and carbon dioxide storage in China. When carbon dioxide is injected into geologic formations, it will be stored in three conditions, molecule, compound or dissolved conditions. Applicable storage formations include deep saline aquifer, deep coal bed and depleted reservoirs, while applicable reservoirs including water drive and dissolved-gas drive reservoirs can be selected by using computational solutions of different formulas. Similarly, each storage capacity of three kinds of storage formations also can be estimated by calculating different formulas.