Phase equilibrium calculation of acid/alcohol hydrocarbon and water system based on stability analysis
Well flow materials in oil and gas development mostly exist in the form of oil,gas and water miscibility.For sour oil and gas fields,acid gases such as hydrogen sulfide or carbon dioxide are often present.In order to avoid hydrate formation and blockage of pipelines,the injection of the alcohol inhibitor is a common method,which will make the fluid composition more complex,presenting a multiphase mixed flow of acid/alcohol hydrocarbon and water.Accurate calculation of the phase equilibrium of hydrocarbon and water system containing acid/alcohol is the basis of predicting phase behavior,and the key to support the simulation of multiphase transport flow in this complex system.The phase equilibrium calculation of this systems based on the classical cubic equation of state is widely used,but there is the problem of low accuracy in calculating the distribution of oil-water two-phase components.Therefore,a stability testing method suitable for acid/alcohol hydrocarbon and water system is proposed by introducing stability analysis method.With the SRK-HV equation of state and stability analysis,a multi-phase and multi-component flash calculation model for acid/alcohol hydrocarbon and water is established.After multiple perspectives verification,the model proposed in this research has high accuracy and stability.
phase equilibriathermodynamicsequation of statestability analysisflash calculation
国家科技期刊平台
NSTL
万方数据
