Therefore,present reservoir fluids are analyzed,CO2 expansion test is conducted,and fluid properties are compared before and after gas injection to determine stimulation mechanism.

• 为此,首先对油井目前流体进行相态分析,并对油藏流体进行CO2膨胀实验,然后将注气前后地层流体的物性进行对比,确定CO2增产机理。