空气泡沫防气窜能力评价的实验研究

摘要

During the process of using air foam displacement technology to explore oilfields, reservoir porosity, throat sorting and other factors has brought some difficulties to the determination of the gas channeling prevention ability of air foam. Therefore, how to determine the injection pressure of gas channeling and calculate the gas injection time accurately are of great significance to air foam displacement technology and economic exploitation of reservoirs. This paper designed gas channeling prevention experi-ments of air foam, determined anti-channeling ability of air foam with the help of core flow experimental device. Besides, it select-ed the initial injection conditions according to the pros and cons of foam in the cores and studied the impact of gas injection time af-ter gas breakthrough on the anti-channeling ability of air foam. It also defined the injection differential pressure of gas channeling formation, which provided new thoughts for EOR of domestic oilfields by gas flooding.%在运用空气泡沫驱替技术来开发油田的过程中，储层孔隙和喉道的不均匀程度等因素给确定空气泡沫防窜能力的大小带来了一定的困难。因此，确定气窜注入压差和注气时间的准确把握，对于空气泡沫驱技术和油藏的经济开采具有重大的意义。设计了空气泡沫防窜实验，通过岩心流动实验装置界定空气泡沫的防窜能力，根据岩心中形成泡沫的优劣程度，选择初始注入条件，研究气体突破后的注气时间对空气泡沫防窜能力的影响，并界定了形成气窜的注入压差，旨在为我国油田气驱技术提高采收率提供新的思路。