超临界二氧化碳射流破岩试验  

Rock-breaking experiment with supercritical carbon dioxide jet

作　　者：杜玉昆 王瑞和 倪红坚 霍洪俊 黄志远[2] 岳伟民 赵焕省 赵博 

机构地区：[1]中国石油大学石油工程学院,山东青岛266580 [2]中国石化胜利油田钻井工艺研究院,山东东营257000 [3]北京探矿工程研究所,北京100083

出　　处：《中国石油大学学报（自然科学版）》2012年第4期93-96,共4页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家'973'计划课题(2010CB226703);国家自然科学基金项目(50974130/51034007);山东省自然科学基金项目(2011ZRE28107);中国石油大学(华东)优秀博士学位论文培育计划以及研究生自主创新项目(11CX06021A)

摘　　要：采用超临界二氧化碳射流进行破岩钻井是一种极具潜力的非常规油气藏钻采方法。依据石油钻完井的特点和超临界二氧化碳流体的特性,研制超临界二氧化碳钻完井试验系统,并进行超临界二氧化碳射流破岩试验。结果表明:超临界二氧化碳射流比高压水射流破岩具有显著优势;喷嘴直径、喷距、射流压力和岩石性能对超临界二氧化碳射流与高压水射流破岩的影响规律基本一致;井底环境温度对超临界二氧化碳射流破岩效果影响显著,在向超临界态转变的过程中,射流破岩效果随着温度的升高急剧增强,当温度超过临界值后,温度升高对射流破岩效果的改善趋缓。Drilling with supercritical carbon jet is an unconventional oil and gas reservoirs drilling and production method with great potential. The supercritical carbon jet experimental system was developed based on the basic characteristics of supercritieal carbon dioxide combined with the actual drilling and completion technology features. The rock-breaking experiment was carried out with the experimental system. The results show that the rock-breaking ability of supercritical carbon dioxide jet is much better than the high pressure water jet. The effect of the nozzle diameter, standoff distance, jet pressure and rock parameter on the rock-breaking ability of supercritical carbon dioxide jet agrees well with that of high pressure water jet, while the effect of bottom-hole temperature on the rock-breaking ability of supercritical carbon dioxide jet is very marked. And the rock-breaking effect sharply increases as the increase of jet temperature and the increase trend reflects a slowing decline after the temperature exceeding the critical value.

关 键 词：二氧化碳 超临界流体 射流 岩石破碎 钻完井 

分 类 号：TE248[石油与天然气工程—油气井工程]