Research On The Change Rule Of Water Vapor For Condensate Gas Reservoir With High Temperature And Low Condensate Oil

The condensate gas reservoirs play an important role in the of the world's total petroleum resource.With the development of condensate gas,more and more condensate gas reservoir with high temperature and high pressure had emerged.However,the effect of water vapor on the phase behavior of condensate gas system were always ignored in the conventional phase state study,which led to the insufficientunderstanding of the phase behavior characteristics for condensate with water vapor.For the above reason,it is important to study the change rule of water vapor for condensate gas reservoir.For Y-C condensate gas reservoir with high temperature and low condensate oil,the ignorance of formation water result in large deviation of liquid production between the actual value and that of predicted liquid production.Aimed at the above problem,this paper had carried out systematic laboratory experiment and developed the phase behavior software for condensate gas reservoir with water vapor.The change rule of water vapor for condensate gas reservoir with high temperature and low condensate oil had been simulated with the above software.The study could have some guidance function on the development of similar condensate gas reservoir and accurate analysis the change rule of water vapor in the formation.Firstly,this paper had carried put the phase behavior laboratory experiment and analyzed the effect of water vapor on phase state of condensate gas system.Secondly,a relationship among water vapor content,carbon dioxide content,pressure and heavy fraction had been obtained,which could offer vital parameters for the development of phase behavior software.The above software was developed with new method for calculating the binary interaction coefficient and the change rule of water vapor of Y-C condensate gas reservoir with high temperature and low condensate oilwas simulated and represented with the software.It was concluded that the water vapor content would increase with the increasing of carbon dioxide content and temperature.The water vapor content would increase with the increasing of heavy fraction and decrease with the increasing of nitrogen content when its content was low.However,Thewater vapor content would decrease with the increasing of heavy fraction when its content was high.