世界地质储层二氧化碳理论埋存量评价技术研究

Study into Technologies for Estimating Theoretical Volume of CO2 Stored Underground Worldwide

埋存CO2是避免气候变化的有效途径之一,地下埋存可供选择的主要方式包括枯竭油气藏埋存、深部盐水储层埋存、不能开采的煤层埋存以及深海埋存等。介绍了各种CO2埋存方式的埋存机理,分析了不同方式下CO2埋存量的各种计算方法。同时给出了IEA和IPCC评估的世界储层CO2埋存量,评估结果表明,深部盐水层可提供巨大的埋存潜力,在400～10000Gt之间;枯竭油气藏也具有很大的埋存潜力,可以埋存全部需埋存CO2的40%。CO2地质储层埋存将对全球CO2减排起到举足轻重的作用。

Burying CO2 underground is an effective way of preventing climate changes.The main locations suitable for burying CO2 include depleted oil and gas reservoirs,deep salt water bearing reservoirs, inexploitable coalbeds and deep seafloors.This article describes the mechanisms of various underground CO2 storage methods and examines the methods of calculating CO2 storage capacity for different storage methods. The article also presents IEA＇s and IPCC＇s figures on the volume of CO2 in formations worldwide.Evaluation results suggest that deep salt water bearing reservoirs have enormous potential capacity to store CO2,at 400～10000Gt and that depleted oil and gas reservoirs also have big potential for storing CO2,which could hold up to 40% of all CO2 needing to be stored.Burying CO2 underground will play a very important role in reducing global CO2 emissions.