深层块状特稠油油藏蒸汽吞吐后期转换开发方式研究

以W油藏为研究对象,应用数值模拟方法对深层特稠油油藏蒸汽吞吐后期转换开发方式进行研究。研究结果表明,该油藏适合双水平井重力泄水辅助蒸汽驱开发,最佳注采参数为：注汽速度240t/d,采注比1.2,井底干度大于50%。该成果对深层稠油油藏吞吐后期进一步提高采收率具有重要指导意义。

The study on the replacing development method at the late stage of steam stimulation in deep and thick block super-heavy oil Reservoir

Taking W reservoir as a research object, this paper focuses on the study upon the replacing development method at late stage of steam stimulation in deep and thick block super-heavy oil Reservoir. The result shows that it is suitable for W reservoir, using steam-flooding assisted by gravity water drainage with dual horizontal wells. The best production and injection parameters are as follows: The stream injection rate is 240t/d, the ratio of production and injection is 1.2 and the dryness fraction at the bottom-hole is above 50%. This research bears important references for deep and thick block super-heavy oil Reservoir which is at late stage of steam stimulation.