It is defined by PVT sampling analysis with high cost and related experience formulae with low accuracy at present, so it is difficult to define the saturation pressure.
目前主要通过PVT取样分析测定和相关经验公式来确定它，前者费用高，后者精度差，给饱和压力的确定带来困难。
The conventional samples of formation fluids can be used in laboratory PVT measurements to provide viscosity data, but the cost of sampling and data analysis is relatively higher.
常规地层流体取样的实验室PVT分析可以提供流体的粘度数据，但是取样及分析的成本较高。
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