CAJ | 학술논문

为了研究二次射孔对筛管剩余强度影响的变化规律,利用有限元分析软件ANSYS分别建立了井下二次射孔时新旧两孔处于两种不同情况下的有限元模型,模拟分析了二次射孔对筛管剩余强度的影响,研究结果表明:在进行二次射孔时,最佳射孔位置为中线附近区域,此时不仅能保证油气流通面积、提高采油效率,并且可以使筛管的剩余强度提高,达到了二次射孔的目的;在二次射孔时应尽量避免出现新孔与旧孔相交的情况,若不得已出现,要保证相交孔圆心角大于90°,并且随着圆心角的增大,筛管剩余强度也不断增大.
위료연구이차사공대사관잉여강도영향적변화규률,이용유한원분석연건ANSYS분별건립료정하이차사공시신구량공처우량충불동정황하적유한원모형,모의분석료이차사공대사관잉여강도적영향,연구결과표명:재진행이차사공시,최가사공위치위중선부근구역,차시불부능보증유기류통면적、제고채유효솔,병차가이사사관적잉여강도제고,체도료이차사공적목적;재이차사공시응진량피면출현신공여구공상교적정황,약불득이출현,요보증상교공원심각대우90°,병차수착원심각적증대,사관잉여강도야불단증대.
?In?order?to?understand?the?effect?of?secondary?perforation?on?screen?pipe?strength,?the?finite?element?models?of?bullet?hole?were established with the help of software ANSYS when the positions of secondary and original perforation were different, and then the effect?of?secondary?perforation?on?the?residual?intensity?of?screen?pipe?was?analyzed.?The?results?show?that?the?best?position?for?secondary?perforation?is?regions?near?the?midline.?With?the?favorable?position,?large?oil?and?gas?flow?area?can?be?ensured?which?will?result?in?higher?oil?recovery?efficiency.?And?the?goals?of?secondary?perforation?can?be?met?by?enhancing?residual?intensity?of?screen?pipe.?At?the?same?time, the intersection of secondary and original perforation bullet hole should be avoided, if it can’t be avoided, the cross hole central angle?should?be?more?than?90?degree,?because?that?the?residual?strength?will?grow?with?the?increase?of?central?angle.