风城油田重18井区超稠油油藏注气方式优化选择研究

水平井热采模式一直是改善特、超稠油油藏开发效果的有效手段。在热采中后期,常规同采同注的注气方式存在着蒸汽热利用率低、蒸汽波及范围小和剩余油量大等问题。研究不同注气方式对该类油藏开发效果和经济效益的影响,研究表明,水平井组一注多采和直平井组合吞吐方式均能很大程度提高蒸汽利用率,有效驱替井间的剩余油。

Research on Optimal Choice of Gas Injection Modes for Ultra Heavy Oil Reservoir in Fengcheng Oilfield Zhong18 Well Area

Horizontal well thermal recovery mode is an effective way to improve ultra heavy oil reservoir development effect. In the late thermal recovery, conventional gas injection mode has some shortcomings, such as low steam heat utilization, small steam sweep range, much remaining oil and so on. Influence of different gas injection methods on reservoir development effect and economic benefits was investigated. The results show that the methods of horizontal well group one injection well-several production wells and vertical- horizontal combination stimulation can improve steam utilization in large extent, and effectively displace the remaining oil between wells.