澳大利亚Otway盆地二氧化碳地质封存示范工程介绍

澳大利亚Otway盆地二氧化碳地质封存示范工程是澳大利亚第一个完整的从源到汇的碳封存研究项目，也是碳封存领导论坛（CSLF）和国际能源总署（IEA）认可的二氧化碳地质封存国际合作项目，由澳大利亚CO2CRC牵头开展相关研究。项目封存场地位于澳大利亚维多利亚州的Otway盆地，分两个阶段进行。第一阶段，2004~2010年开展衰竭气田的二氧化碳地质封存研究，已向位于地下深处2000m的晚白垩系Waarre C粗砂岩地层灌注二氧化碳混合气体65000多吨，并成功实现构造圈闭封存，同时开展了地下水、土壤气体、大气、地球化学、地球物理等综合监测；第二阶段，2010 ~2015年开展地下咸水层封存二氧化碳的研究，将向位于地下1500m深处的晚白垩系Paaratte细砂岩咸水含水层注入10000t二氧化碳，实现二氧化碳毛细滞留圈闭封存，目前正在开展前期抽注试验。

Introduction to the CO2 Geosequestration Demonstration Project in the Otway Basin in Australia

The CO2 geological storage demonstration project in the Otway Basin is the first carbon geosequestration which is integrated from source to sink in Australia.The international collaborated research program is also approved by the Carbon Sequestration Leadership Forum and the International Energy Agency.CO2CRC is in charge of the project.The project site is located in the Otway basin in the Victoria state.The research project commenced in 2003 and the whole research plan includes 2 stages.Over 65 000 tons of CO2 have successfully been injected into the Waarre C coarse sandstone Formation at a depth of 2 000 m below the land surface in stage 1,which lasted 5 years from 2004 to 2010.The mainly trapping mechanism is the structure closure.The stage 2 research is now going on,10 000 tons of CO2 will be injected into the saline aquifer of the Paaratte Formation 1 500m below ther land surface.The aim is to examine residual gas trapping and dissolution trapping in the saline aquifer."Huff-push" site field test of pre-injection of stage 2 is carried out.