注空气低温氧化驱油室内实验与油藏筛选标准

LTO laboratory experiments and reservoir selection criteria of air injection

对于低渗透油藏和注水开发后期油藏来说,注空气低温氧化提高采收率技术是一种经济、有效的方法。通过注空气低温氧化静态实验和注空气动态驱油实验,进行注空气技术可行性研究,评价不同油品的低温氧化性能,结合应用实例,建立了注空气目标油藏筛选标准,如油藏温度、油藏厚度、原油性质等。产出气中氧气的体积分数低于5%的实验结果表明,开展注空气提高采收率技术安全、有效,具有推广应用的价值。

For improving the oil recovery of low permeability reservoirs and later water flooded reservoirs,air injection through a low temperature oxidation(LTO)process is an economic and effective method.Static oxidation experiment and dynamic oil displacement experiments were completed for air injection,and the feasibility of the air injection was researched.Low temperature oxidation capability of different oil was evaluated.The reservoir selec-[ion criteria for the air injection,including reservoir temperature,reservoir thickness and crude oil characteristics,were given based on experimental results and field experience.The laboratory findings with oxygen component less than 5% in produced gas show that it is safe and effective to use the air injection for improving the oil recovery,and this method is worth to popularize and apply.