饱和压力是油田开发的重要参数之一。目前,测定原油饱和压力的方法,是用深井取样器从井下取得原油样品,通过试验室在PVT仪器中,测得压力和体积的关系曲线求得的。然而,这种方法对井底取样点流压高于饱和压力的情况是有成效的,但是,对静止压力高于饱和压力,流动压力低于饱和压力的情况,欲想取得具有井底代表性的油样就困难了。大庆油田的大多数油井属于静止压力高于饱和压力、流动压力低于饱和压力的类型,深井取样甚为困难,因此,很多井没有取得饱和压力资料。寻求一种简单易行,能较 Saturated pressure is one of the most important parameters in oilfield development. At present, the method for determining the saturation pressure of crude oil is to obtain a sample of crude oil from a well using a deep well sampler, and obtain the relation curve of pressure and volume in a PVT instrument in a laboratory. However, this method is effective when the pressure at the sampling point in the bottom hole is higher than the saturation pressure. However, if the static pressure is higher than the saturation pressure and the flow pressure is lower than the saturation pressure, The oil sample is difficult. Most wells in Daqing Oilfield belong to the category that the static pressure is higher than the saturation pressure and the flow pressure is lower than the saturation pressure. Sampling in deep wells is very difficult, therefore, many wells do not obtain the saturated pressure data. Seeking a simple, able to compare