中文摘要：

利用数值模拟方法及Surfer制图软件制作了蒸汽辅助重力泄油（SAGD）和蒸汽与天然气驱（SAGP）两种开采方式在采油过程中不同重力泄油阶段（泄油初期、泄油高峰期、泄油末期）的温度场、剩余油饱和度场的场图,更直观、可靠地对比研究了SAGD与SAGP的蒸汽腔形成及扩展过程以及不同泄油阶段蒸汽腔形状及渗流特征,并对两种开采方式的开采效果进行了比较。研究结果表明：在SAGP开采过程中,蒸汽腔的横向扩展比SAGD快,垂向扩展较SAGD慢;在SAGD的注入蒸汽中添加非凝析气体能减少蒸汽注入量,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;实例研究表明,SAGP可减缓日产油的降幅,延长顶水超稠油油藏的开发时间,改善其开发效果。

英文摘要：

Using the numerical simulation method and the drafting software of Surfer,we charted the temperature fields and remaining oil saturation fields of steam assisted gravity drainage（SAGD） and steam and gas push（SAGP） in oil drainage periods,including beginning,peak stage and last stage of oil drainage.An intuitive and reliable comparative research was done about the formation and expanding process of steam chambers,the shape of steam chambers and flow features in different oil drainage periods.The recovery effectiveness of the two production methods was compared.The results show that： in the SAGP production process,the lateral expansion of the steam chamber is faster than that in SAGD and the vertical expansion slower than that in SAGD.By adding non-condensate gas in the steam of SAGD,it can reduce the amount of steam injection,increase thermal efficiency,improve the ratio of oil to steam,and ultimately improve the development effectiveness of SAGD.The case study indicates that SAGP can slow the decline of oil rate and extend the development time of heavy oil reservoir and improve the development effectiveness.