泡沫复合驱注入方式、段塞优化及矿场试验研究

INJECTION PATTERN AND SLUG OPTIMIZATION OF FOAM FLOODING AND ITS PILOT TEST

针对影响泡沫复合驱驱油效率的注入方式、注入程序及段塞大小等重要因素进行了一系列的研究。通过从美国TEMCO公司引进的多功能驱替设备 ,所做的大量的物理模拟试验 ,总结出了气液交替注入时 ,注入交替段塞的大小对驱油效率的影响规律 ,利用正交设计法研究了前后段塞的设置与否及种类对泡沫复合驱驱油效率的影响程度 ,还对主次段塞的大小进行优化 ,在保证较高的驱油效率的前提下降低成本。大量的室内驱油实验结果表明 ,泡沫复合体系的驱油效率比水驱提高 30 %以上 。

This paper studies the factors including injection pattern, injection procedure and slug size which influence the displacement efficiency of loam flooding. It performs a large amount of physical simulation experiment using the multi function displacement equipment which is imported from American TEMCO Company and summarizes the effecting rule of the injected alternating slug size on the displacement efficiency during the alternating injection of gas and liquid. it uses orthogonal method to study the set and type of pre slug and post slug and their effect on the displacement efficiency of foam flooding and optimizes the main and sub slug size so as to decrease the cost while keeping a high displacement efficiency. Experiment result shows that the displacement efficiency of foam flooding is 30% higher than that of water flooding.