含水对普光酸性气田流体物性的影响

为了确定酸性气藏含水是否对其流体物性有影响，笔者通过对普光酸性气田的气样配置了相应的实验无水气样和含水气样，并进行了无水酸性气体和含水酸性气体PVT实验研究。实验结果表明：酸性气体含水对气体偏差因子无影响，而对气体黏度有较大影响，主要表现在低压（<40MPa）条件下。温度对酸性气体的含水量、黏度、偏差因子影响较小。同一压力条件下，温度越高，酸性气体中所含水量越大，气体黏度越小。一定温度,低压条件下，压力升高，气体含水量急剧下降，含水酸性气体黏度减小的程度明显高于未含水酸性气体黏度减小的程度；高压（>40MPa）条件下，压力的升高，酸性气体的含水对其黏度影响较小。

Effects of water on fluid physical properties of Puguang sour gas reservoir

In order to determine whether acidic gas reservoir water cut is influential to the fluid physical properties，some PVT experiments of anhydrous acid gas and aqueous acid gas were developed based on gas sample of Puguang sour gas reservoir.The experimental results show that water has no effect on gas deviation factor of acidic gas and a larger influence on gas viscosity，which is mainly manifested at low pressure (<40MPa).Temperature has less effect on water content，viscosity，deviation factor of acidic gas.At constant pressure，the higher temperature is，the greater water content in acidic gases is and the smaller gas viscosity is.Under constant temperature and low pressure，pressure increases，water content of acidic gas declines rapidly，and decreasing viscosity degree of aqueous acidic gas is bigger than that of anhydrous acidic gas.At high pressure (>40MPa)，pressure increases，water has less influence on viscosity of acidic gas.