CAJ | 학술논문

从反循环压井工艺特点出发,以质量守恒、动量守恒和能量守恒为理论基础,推导出反循环压井过程井筒温度场计算模型,并对压井液入口温度、压井液密度、循环时间、压井液排量、压井液导热系数、井深等对反循环压井过程中井筒温度场的影响进行分析.结果表明:随井深增加、压井液入口温度提高、压井液排量减小、循环时间缩短、压井液导热系数增大、压井液密度减小,井筒温度线向高温偏移,反之井筒温度线向低温偏移;调整压井液排量和压井液入口温度是改善井筒温度场最有效的途径.
종반순배압정공예특점출발,이질량수항、동량수항화능량수항위이론기출,추도출반순배압정과정정통온도장계산모형,병대압정액입구온도、압정액밀도、순배시간、압정액배량、압정액도열계수、정심등대반순배압정과정중정통온도장적영향진행분석.결과표명:수정심증가、압정액입구온도제고、압정액배량감소、순배시간축단、압정액도열계수증대、압정액밀도감소,정통온도선향고온편이,반지정통온도선향저온편이;조정압정액배량화압정액입구온도시개선정통온도장최유효적도경.
According to the characteristics of reverse circulation kill and the basic principle of conservation of mass, momentum and energy, a calculation model of wellbore temperature field of reverse circulation kill process was established. The effects of inlet temperature, density, circulation time, flow rate, thermal conductivity of kill fluid and well depth on the wellbore temperature field were analyzed. The results show that with the well depth, inlet temperature and thermal conductivity of kill fluid increasing, and flow rate, circulation time, density of kill fluid decreasing, the wellbore temperature line is shifting to high temperature, otherwise the wellbore temperature line is shifting to low temperature. The wellbore temperature distribution can be improved by adjusting the flow rate and inlet temperature of kill fluid.