CAJ | 학술논문

通过研究气液两相泛流现象，提出了一种压井液注入和气体排出同时进行的动态置换法。通过理论分析得出，动态置换法压井过程中应满足井底压力恒定，气体排出过程应满足物质守恒，压井液全部下落到井底应满足泛流条件，从而建立了动态置换法压井参数计算模型。模型计算得到的气液注入速度比和最大压井液注入速度与Ramtahal实验数据比较接近，可应用到现场动态置换法的压井参数计算。通过对比动、静态置换法压井曲线，得出动态置换法在压井排量比较低情况下，压井时间比静态置换法短，井口压力比较低，从井控设备安全及井控工艺角度来说，动态置换法优于静态置换法。给出了动态置换法压井施工工序，对现场的压井施工有一定的指导意义。
통과연구기액량상범류현상，제출료일충압정액주입화기체배출동시진행적동태치환법。통과이론분석득출，동태치환법압정과정중응만족정저압력항정，기체배출과정응만족물질수항，압정액전부하락도정저응만족범류조건，종이건립료동태치환법압정삼수계산모형。모형계산득도적기액주입속도비화최대압정액주입속도여Ramtahal실험수거비교접근，가응용도현장동태치환법적압정삼수계산。통과대비동、정태치환법압정곡선，득출동태치환법재압정배량비교저정황하，압정시간비정태치환법단，정구압력비교저，종정공설비안전급정공공예각도래설，동태치환법우우정태치환법。급출료동태치환법압정시공공서，대현장적압정시공유일정적지도의의。
Based on the analysis of gas-fluid dual-phase flooding phenomenon,this study proposes a well kill method of dynamic displacement that involves kill fluid injection and simultaneous gas expulsion.In a theoretical process of well killing,dynamic displace-ment maintains constant bottomhole pressure;gas expulsion complies with the law of conservation of matter;and killing fluids falldownward to bottomhole,satisfying flooding conditions.Thus,a calculation model for well killing parameters of dynamic displacement is established.Gas-fluid injection rate ratio and maximal kill fluid injection rate estimated using the proposed model are close tothe Ramtahal experimental data,demonstrating that the model is applicable for use in calculation of on-site well killing parameters.Comparison of well killing curves between dynamic and static displacement shows that at a relatively low killing rate,dynamic displacement involves a shorter period and lower wellhead pressure than static displacement.In terms of equipment safety and technology of well control,dynamic displacement is superior to static displacement.Finally,a well killing procedure of dynamic displacement is given,which provides a reference for on-site well killing operation.