公开(公告)号：US20150322758A1

公开(公告)日：2015-11-12

申请号：US14801088

申请日：2015-07-16

申请人： Statoil ASA

发明人： Jostein ALVESTAD ,  Aurelie LAGISQUET ,  Eimund GILJE

IPC分类号： E21B43/24

CPC分类号： E21B43/24 ,  C09K8/592 ,  E21B43/2408

摘要： A process for the recovery of hydrocarbons from a hydrocarbon bearing formation and in which are situated an upper injection well and a lower production well is presented. The region between the wells is preheated by circulating hot solvent through at least part of both of the wells until hydraulic communication between both wells is achieved. Solvent is injected into the upper injection well at or above its critical temperature and the solvent is pentane or a mixture of butane and pentane. A hot solvent chamber is created consisting of solvent vapour and liquid. Bitumen and solvent are mixed at the boundary of the solvent chamber so formed. The hydrocarbon and solvent are caused to be mixed to drain downwards by gravity and sideways by pressure gradient towards the lower production well. The mixture is produced to the surface through the lower production well.

摘要翻译： 提出了一种从含烃地层回收烃的方法，其中位于上部注入井和较低的生产井。 井之间的区域通过循环热溶剂通过两个井的至少一部分而预热，直到达到两井之间的液压连通。 溶剂在等于或高于其临界温度的情况下注入上部注入井，溶剂是戊烷或丁烷和戊烷的混合物。 产生由溶剂蒸汽和液体组成的热溶剂室。 沥青和溶剂在如此形成的溶剂室的边界处混合。 使烃和溶剂混合，通过重力向下排水，并通过压力梯度向下生产井侧向排出。 通过较低的生产井将混合物制成表面。