CAJ | 학술논문

针对辽河油田先导试验区蒸汽辅助重力泄油(SAGD)过程热损失严重的情况,根据SAGD物理模拟的相似准则将该试验区的一个实际SAGD井组转化为物理模型,进行了SAGD比例物理模拟实验,并在SAGD实验过程中注入蒸汽与氮气混合气体,得到了其开发指标的变化规律.研究结果表明:在SAGD过程添加氮气后,蒸汽腔的横向扩展加快,垂向扩展减缓;在SAGD的注入蒸汽中添加氮气能减少蒸汽注入量,增大热效率,提高油汽比,改善蒸汽辅助重力泄油的开发效果;SAGD过程一开始就注入氮气能得到更好的经济效益.
침대료하유전선도시험구증기보조중력설유(SAGD)과정열손실엄중적정황,근거SAGD물리모의적상사준칙장해시험구적일개실제SAGD정조전화위물리모형,진행료SAGD비례물리모의실험,병재SAGD실험과정중주입증기여담기혼합기체,득도료기개발지표적변화규률.연구결과표명:재SAGD과정첨가담기후,증기강적횡향확전가쾌,수향확전감완;재SAGD적주입증기중첨가담기능감소증기주입량,증대열효솔,제고유기비,개선증기보조중력설유적개발효과;SAGD과정일개시취주입담기능득도경호적경제효익.
Because there is severe heat loss during the process of steam assisted gravity drainage (SAGD) in the pilot test area of Liaohe Oilfield,a practical SAGD well group in the area is simulated into physical model according to similarity criterion of SAGD physical simulation,scaled SAGD physical simulation experiment is conducted,during the process of SAGD experiment,the mixed gas of steam and N_2 is injected and the change law of production index is acquired.Research result indicates that when N_2 is added in SAGD,the lateral expansion of steam chamber is faster and vertical expansion lower.Adding N_2 in injected steam in SAGD can reduce the steam injected amount and enhance heat efficiency and oil/steam ratio,improve the development effectiveness by SAGD.Better economic efficiency can be acquired through injecting N_2 as soon as SAGD is put into operation.