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温高压配样器,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 shorten the test time of the minimum miscibility pressure, a new experimental method for quickly determining the minimum miscibility pressure was proposed according to the principle of interfacial tension disappearance. The method mainly uses a rotatable piston high temperature and high pressure sampler to determine the minimum miscibility pressure by measuring the pressure change during the mixing of crude oil and CO2. This method was used to test the minimum miscibility pressure of crude oil and CO2 in Huaqingchang 6 reservoir and compared with the thin tube method. The results show that the test results are close to those of the thin tube method, Simple operation, short test time characteristics.