Abstract

The effects of different oxygen-containing air on enhanced oil recovery were evaluated by artificial cores with low permeability in displacement experiments. The results show that with the increment of oxygen content, more crude oil could be driven at the higher temperature and pressure, but the effect of oxygen concentration on oil displacement efficiency will be opposite at lower reaction temperatures. The reason is that the mechanism of low temperature oxidation of reservoir crude oil on enhanced recovery of gas drive is different under different temperature and pressure conditions. The results can be used as an experimental reference for the feasibility of air injection to enhance oil recovery in low permeability reservoirs.

摘要

在驱替实验中，通过低渗透率的人造岩心评估了不同含氧空气对提高采油率的影响。结果表明，随着氧含量的增加，在较高的温度和压力下可以驱使更多的原油，但在较低的反应温度下，氧浓度对驱油效率的影响相反。原因是在不同的温度和压力条件下，储层原油的低温氧化对提高气驱采收率的机理是不同的。该结果可作为实验研究的参考，以证明在高渗透性油藏中注空气以提高采收率的可行性。