Dynamical analysis of high-pressure supercritical carbon dioxide jet in well drilling  

作　　者：杜玉昆 王瑞和 倪红坚 黄志远 李木坤 

机构地区：[1]College of Petroleum Engineering, China University of Petroleum (East China) [2]Drilling Technology Research Institute, Sinopec Shengli Oilfield

出　　处：《Journal of Hydrodynamics》2013年第4期528-534,共7页水动力学研究与进展B辑（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (50974130, 51034007);the National Basic Research Development Program of China (973 Program, Grant No. 2010CB226700);supported by the Excellent Ph. D.Thesis Training Fund of China University of Petroleum;the Fundamental Research Funds for the Central Universities (Grant No. 11CX06021A)

摘　　要：This paper presents the design of an experimental setup and mathematical and physical models to determine the dynamical characteristics of the high-pressure supercritical carbon dioxide （SC-CO2） jet with a highly potential applications in the well drilling. The effects of three major factors on the wellbore dynamical characteristics of the high-pressure SC-CO2 jet, i.e., the nozzle diameter, the standoff distance and the jet pressure are determined. It is indicated that the pressure of CO2 reduces severely in the SC-CO2 jet impact process. It is also found that the bottom-hole pressure and the temperature increase as the nozzle diameter increases but de- crease with the increase of the standoff distance. The higher the jet pressure at the welIbore inlet is, the higher the pressure and the lower the temperature at the bottom-hole will be.This paper presents the design of an experimental setup and mathematical and physical models to determine the dynamical characteristics of the high-pressure supercritical carbon dioxide （SC-CO2） jet with a highly potential applications in the well drilling. The effects of three major factors on the wellbore dynamical characteristics of the high-pressure SC-CO2 jet, i.e., the nozzle diameter, the standoff distance and the jet pressure are determined. It is indicated that the pressure of CO2 reduces severely in the SC-CO2 jet impact process. It is also found that the bottom-hole pressure and the temperature increase as the nozzle diameter increases but de- crease with the increase of the standoff distance. The higher the jet pressure at the welIbore inlet is, the higher the pressure and the lower the temperature at the bottom-hole will be.

关 键 词：supercritical carbon dioxide wellbore dynamics experimental determination 

分 类 号：TE21[石油与天然气工程—油气井工程]