浅薄层超稠油油藏蒸汽吞吐后开发方式实验

应用三维相似准则设计并建立了高温高压注蒸汽三维实验模型，对影响注蒸汽采油过程的重要油藏参数进行了比例模化，研究了3种不同井网的蒸汽吞吐后注蒸汽采油接替开发方式。实验结果表明，与直井汽驱和水平井注汽直井采油相比，直井注汽水平井采油方式高产期较长，采油速率高，实验采出程度可达到70%. 对于油层厚度为10~15 m的浅层超稠油油藏吞吐后期，直井注汽水平井采油是可选的接替开发方式。

Experimental Study of Development Process of Shallow and Thin Extra-Heavy Oil Reservoirs Following Steam Stimulation

A 3?D scaled physical model was designed and developed for high temperature and high pressure steam injection process. Pujol and Boberg’s scaling criteria and horizontal well similarity criterion were used for the modeling of the reservoir parameters and horizontal well parameters influencing steam injection recovery. Three alternative processes with different well patterns following steam stimulation were studied, including vertical well steam drive, vertical well steam injection and horizontal well production, horizontal well steam injection and vertical well production. The experimental results show that the vertical well steam injection and horizontal well production process (or vertical injector?horizontal producer combination) is of longer high?yield period and high oil rate, with experimental recovery percent of 70%. For a shallow extra?heavy oil reservoir with thickness of 10~15 m, the vertical injector?horizontal producer combination is an option for alternative development process after single well steam stimulation