注空气低温氧化提高采收率技术研究

Research on the Technique of Low Temperature Oxidation to Enhance Oil Recovery by Air Injection

注空气低温氧化是一种提高低渗透油藏采收率比较有效的方法,它既能发挥注气的作用,又具有氧化产生的其他效果。重质原油能够部分地被低温氧化成轻质原油,放热降低原油黏度,提高原油流动能力,达到烟道气驱或N_2驱的效果,提高储量的动用程度。以辽河油田新杜1块为例,运用数值模拟技术,优化注气压力、生产井井底压力、注气速度、注气量等相关参数,并对注气提高采收率效果进行评价。

Air injection of low temperature oxidation（LTO） is an effective EOR method, it not only can play the role of the gas injection, but also has other effects generated by the oxidation. Heavy crude oil can partially be low-tem- perature oxidated into light crude oil; LTO can also reduce the viscosity of the crude oil by heat release, increase flow capacity of the crude oil, achieve the effect of flue gas flooding or N2 flooding, and improve the producing degree of reserves. Taking XinDu 1 block in Liaohe oil field as an example, optimize gas injection pressure, bottom pressure of production wells, gas injection rate, gas injection volume and other related parameters, and evaluate the effect of gas injection for enhancing oil recovery with numerical simulation technique.