蒸汽辅助重力泄油渗流机理研究

针对双水平井及直井与水平井组合蒸汽辅助重力泄油(SAGD)两种常用布井方式,利用数值模拟方法及Surfer制图软件制作出重力过程中泄油初期、高峰期及泄油后期不同泄油阶段蒸汽腔截面的温度场、压力场、剩余油饱和度场的场图,更直观、形象的描述了SAGD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泄油机理,并对两种布井方式的重力泄油效果进行了比较,为SAGD技术的应用提供决策依据.

Study of the Seep Mechanism of Steam Assisted Gravity Drainage

Steam Assisted Gravity Draining (SAGD) has been proved to be an effective way for extra heavy oil, supper heavy oil recovery. Aiming at the commonly used two well configurations namely double horizontal wells and the combination of vertical and horizontal wells, this paper gained the maps of temperature field, pressure field, and residual oil saturation field of the steam chamber section at the initial stage, the fastigium stage and the evening stage. These maps intuitively and visually characterized the forming and expanding process of the steam chamber and the shape and the drainage mechanism at the different drainage moments. Further more, this paper also made a comparison between the two well configurations and these provided a theoretic foundation for the expansion of SAGD.