摘要
注N2改善SAGD开发效果(SAGP)的作用机理,亟待全面了解和深度认识。通过对双水平井SAGD、直井与水平井组合"SAGD"两种前沿稠油热采方式的技术优势与局限性的解析,阐述了SAGD生产过程中,加注N2的时机、方式、注汽量,对SAGD开发效果的影响作用。N2在油层顶部形成了隔离层以后,能够节省SAGD生产过程中蒸汽的注入量和减少蒸汽的热损失;但是,如果注入N2的时机过早,将扼杀SAGD技术优势的发挥。所取得的认识,对于现场有效实施,具有指导意义。
The mechanism of develop SAGD effect by nitrogen-injection need to study.Technical advantages and limitations of thermal recovery technology of double horizontal well SAGD and the combination of vertical and horizontal wells SAGD were studied.The effects have acknowledged on the timing of the filling nitrogen,methods,steam injection volume.The volume and heat loss of steam can be reduced after nitrogen isolation layer on top of the reservoir.But if the timing of the injection of nitrogen early,it will stifle SAGD technological advantage.The result has the instructive significance to the effective implementation.
出处
《化学工程师》
CAS
2015年第4期81-85,共5页
Chemical Engineer
