为了缩短最小混相压力的测试时间,根据界面张力消失原理,提出了一种可以快速确定最小混相压力的实验新方法。该方法主要是利用可旋转的活塞式高压配样器,通过测定原油和CO₂混合过程中的压力变化来确定最小混相压力。利用该方法对华庆长6储层的原油与CO₂的最小混相压力进行测试,并与细管法测试结果进行对比,结果表明,测试结果与细管法的测试结果较接近,且该方法具有操作简单、实验过程耗时较短的特点。

In order to reduce the test time of MMP, according to the principle of interfracial tension disappearing, a new experimental method which is able to quickly determine the MMP is developed. In the experimental method, the main equipment is a rotatable high pressure piston-typed sample preparation container. In order to determine the MMP, the pressure when the oil is mixed with CO₂ is measured. Using the test method of two-phase contact process, the CO₂ MMP of reservoir oil in Chang six of Huaqing has been measured. Comparing with the test result of slim tube test, the MMP result based on two-phase contact process is very closed to the result based on slim tube test. The test method of two-phase contact process possesses features of both simple operation and short test time period.