我国石油工业二氧化碳地质封存研究

Laboratory research of high temperature fracturing fluid in west Sichuan

段海燕 王雷

YANG Bing HUANG Guichun LI Shanggui

吉林大学东北亚研究院，吉林长春　130012 中石化国际勘探开发公司，北京　100080

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°?，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??济开发和环境保护的双赢，还为发达国家提供“??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??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。

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.