CAJ | 학술논문

针对单层配注量小、层间压差较大的低渗透油藏分层注水,采用常规水嘴过流面积小、不易实现分层配注问题,提出了以现有堵塞器水嘴外形尺寸、承压能力等参数为依据,设计一种新型小流量水嘴.该水嘴通过绕流增加流道长度以增加沿程损失,改变水嘴内流体的流动方向和扩大流道截面积来增加水嘴的局部压力损失,实现在相同的节流效果前提下,既满足小水量注水的要求,又大幅度地扩大了水嘴通流面积.利用FLUENT软件对新型小流量配水嘴和常规配水嘴的嘴损特性进行了数值模拟,通过数值模拟结果表明:新型小流量水嘴大幅度地增加了过流面积,从而实现层间压差较大时的分层注水,可进一步推广应用.
침대단층배주량소、층간압차교대적저삼투유장분층주수,채용상규수취과류면적소、불역실현분층배주문제,제출료이현유도새기수취외형척촌、승압능력등삼수위의거,설계일충신형소류량수취.해수취통과요류증가류도장도이증가연정손실,개변수취내류체적류동방향화확대류도절면적래증가수취적국부압력손실,실현재상동적절류효과전제하,기만족소수량주수적요구,우대폭도지확대료수취통류면적.이용FLUENT연건대신형소류량배수취화상규배수취적취손특성진행료수치모의,통과수치모의결과표명:신형소류량수취대폭도지증가료과류면적,종이실현층간압차교대시적분층주수,가진일보추엄응용.
For?the?zonal?injection?of?low?permeability?reservoirs?with?low?layer?flow?allocation?and?large?layer?pressure?difference,?conventional?nozzle?has?the?problem?of?small?flowing?area?and?it?is?difficult?to?allocate?layer?injection.?A?novel?type?of?low?flow?rate?nozzle?was?designed,?based?on?the?design?parameters?of?the?current?water?nozzle,?such?as?shape,?size,?and?pressure?bearing?capacity.?The?water?nozzle?increases?the?frictional?loss?through?increasing?flow?length,?changing?the?direction?of?flowing?medium?and?expanding?cross-section?area.?So?with?the?novel?water?nozzle,?under?the?same?throttling?effect,?it?not?only?satisfies?with?the?requirement?of?low?flow?rate,?but?also?greatly?expands?the?open?area.?Numerical?simulation?was?conducted?for?the?pressure?loss?characteristics?of?the?novel?low?flow?rate?nozzle?and?conventional?nozzle?by?using?FLUENT?software,?and?the?results?showed?that?the?flow?area?of?the?novel?low?flow?rate?nozzle?is?larger?than?that?of?conventional?nozzles?with?equal?throttling?effect.?Therefore?the?zonal?injection?was?carried?out?under?large?layer?pressure?difference.