断块油藏注采耦合物理模拟实验
Physical simulation experiment of injection-production coupling
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摘要: 针对断块油藏地质特点及开发特征,利用填砂管设计了注采耦合物理模拟实验,考察了弹性能量对提高采收率的影响,进一步揭示了其提高采收率机理。实验结果表明,在憋压阶段,砂管里储备的弹性能量仍能够使油流动并驱出,提高波及面积,提高采出程度19.48%,每次注采循环的注入倍数为0.038 PV,含水下降漏斗宽度为0.027 2 PV。实验结果为制定相关的开发方案提供了依据。Abstract: Aiming at the geological characteristics and development characteristics of oil reservoirs in fault blocks, a physical simulation experiment of injection-production coupling was designed by means of sand filled pipes. The effect of elastic energy on enhanced oil recovery was investigated and the mechanism of enhanced oil recovery was further revealed. The experimental results show that in the stage of confining pressure, the elastic energy stored in the sand pipe can still make the oil flow and drive out, increase the swept area, and enhance the degree of production 19.48%. The injection multiple of each injection and production cycle is 0.038 PV, and the width of the water-cut drop funnel is 0.027 2 PV. The experimental results provide a basis for making relevant development plans.