| 摘要: |
| 采用超临界二氧化破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。 |
| 关键词: 二氧化碳 超临界流体 射流 岩石破碎 钻完井 |
| DOI：10.3969/j.issn.1673-5005.2012.04.017 |
| 分类号::TE 248 |
| 基金项目:国家“ 973 ”计划课题(2010CB226703 );围家自然科学基金项0 ( 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(11 CX06021A) |
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| Rock-breaking experiment with supercritical carbon dioxide jet |
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DU Yu-kun1,WANG Rui-he1,NI Hong-jian1,HUO Hong-jun1,HUANG Zhi-yuan2,YUE Wei-miiT3,ZHAO Huan-xing1,ZHAO Bo1
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(1. School of Petroleum Engineering in China University of Petroleum，Qingdao 266580, China ;2. Drilling Technology Research Institute, Shengli Oilfield, SIN OPEC, Dongying 257000, China ;3. Beijing Institute of Exploration Engineering, Beijing 100083, China)
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| Abstract: |
| 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 supercritical carbon dioxide combined with ihe 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 ihe 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 shaiply increases as the increase of jet temperature and the increase trend reflects a slowing decline after the temperature exceeding the critical value. |
| Key words: carbon dioxide supercritical fluid jet rock-breaking drilling and completion |
