我国石油工业二氧化碳地质封存研究

石油工业二氧化碳地质封存,既能提高石油采收率又可实现二氧化碳永久封存.应用实证研究和对比分析的方法,研究我国与美国的油藏条件、技术水平等相关状况的差异,分析我国二氧化碳地质封存的潜力与现实障碍,发现我国需要通过国际合作开展温室气体地质封存.<京都议定书>规定的清洁发展机制提供了项目合作平台,温室气体封存项目合作,不仅能使我国实现经济开发和环境保护的双赢,还为发达国家提供"经核证的减排量",帮助其完成国际碳减排任务,项目合作前景广阔.但当前政治、成本、技术风险等因素制约着合作项目的广泛开展,由此,贯彻落实科学发展观,借鉴国外经验,进行自主技术创新,是我国现阶段实现二氧化碳地质封存的现实选择.

Study on the carbon dioxide geological storage in petroleum industry in China

Poor temperature resistance of west Sichuan fracturing fluid at present can’t meet the need of deep reservoir reconstruction. Starting from analyzing factors affecting temperature resistance of fracturing fluid, organic borate-zirconate compound cross-linker WD-51D was synthesized with high temperature resistance and adjustable cross-linking time. In addition, this paper developed a high temperature (140 ℃) fracturing fluid system by the introduction of temperature stabilizer YA-10. Experiments indicate that this fracturing fluid possesses the advantage of powerful temperature/shear (T/S) resistance (viscosity maintains above 100 mPa?s at 140 ℃ and 170 s-1 continuous shearing for 120 min), good filtrate reduction property (filtration coefficient of 7.49×10-4 m/min0.5), low formation damage ( 27.99%) and so on. This fracturing fluid can meet the requirement of deep reservoir reconstruction in west Sichuan, and has successfully applied in DaYi 2 well.