原油空气氧化动态驱替实验研究

The Research on the Air Oxidation Dynamic Displacement Experiment

低渗透油田现有开采方式多为注水开发,采出程度低、含水率居高不下。采用物理模拟方法,结合实际参数,对低渗透油田L35区块进行了空气氧化动态驱替实验。实验结果表明,温度、压力、注采压差(注气速度)及油层渗透率是影响空气驱油效率的主要因素。在地层条件下,原油与空气难以达到混相,表现为非混相驱替特征。实验结果对现场开采提供了有效的技术支持。

For the low permeable oilfield,the water flooding development is the main production method at present,with the low degree of reserve recovery and the high water cut.Using physical simulation method,combined with the actual parameters,the air oxidation dynamic displacement experiment was carried out for low permeable oil fields block of L35.The experimental results show that the temperature,pressure,injection / production pressure difference（gas injection velocity） and the reservoir permeability are the main factors that influence the efficiency of the air oil drive.Under the condition of formation,it is difficult to achieve miscible phase of the crude oil and the air,with the performance for immiscible displacement characteristics.The results provide effective technical support of field production.