重庆大学学报Issue(3)：100-106,7.DOI:10.11835/j.issn.1000-582X.2015.03.014
直井段超临界二氧化碳携岩数值模拟分析
Numerical simulation of cutting-carrying efficiency of supercritical carbon dioxide in vertical well
摘要
Abstract
Cutting-carrying mechanism of CO2 is basic for rational hydralics design,which helps to achieve safe and efficient use of drilling with supercritical carbon dioxide.In this view,change law of partical size distribution and influences of drilling parameters on cutting-carrying efficiency is simulated and analyzed, with consideration of the influences of physical parameters change of CO2 .Results show that there is no positive correlation between change law of partical size distribution and partical diameter for the existence of mutual interference,which demonstrates Oulerian method used to analyze cutting-carrying mechanism feasible.Pressure and temperature influences the change law of partical size distribution,and the cutting-carrying efficiency increases as the increase of pressure and the decrease of temperature,which agrees with experimental results.Larger displacement and lower ROP helps to improve cutting-carrying efficiency,and actual critical displacement is larger than theoretical value calculated with Ahemd method.The cutting-carrying efficiency decreases as eccentricity increases and then increases as the eccentricity is beyond 0.8.Outcomes offers important basis for the improvement of practical skills.关键词
超临界二氧化碳/携岩/粒径分布/偏心度/数值模拟/直井Key words
supercritical carbon dioxide/carrying cuttings/partical size distribution/eccentricity/numerical simulation/vertical well分类
能源科技引用本文复制引用
宋维强,霍洪俊,王瑞和,倪红坚,沈忠厚,高纪超..直井段超临界二氧化碳携岩数值模拟分析[J].重庆大学学报,2015,(3):100-106,7.基金项目
国家重点基础研究发展计划（973计划）（2014CB239202）；山东省自然科学基金重点项目（ZR2011EEZ003）；教育部博士点基金项目（20120133110011，20130133110006）；中央高校基本科研业务费专项资金（14CX02166A）。Supported by National Program on Key Basic Research Project of China （973 Program）（2014CB239202），Key Project of Natural Science Foundation of Shandong Province（ZR2011EEZ003），the Ph．D．Programs Foundation of Ministry of Education of China（20120133110011，20130133110006）and Fundamental Research Funds for the Central Universities（14CX02166A）． （）
