The Simulation Study On Production Perfomance Of Fractured-vuggy Carbonate Condensate Gas Reservoirs

Carbonate reservoirs are widely distributed around the world.Most of those reserveoirs are large-scale reserves with huge production.In the last ten years,large carbonate gas&oil reservoir have been found in China.Carbonate gas&oil fields have a good prospect and great potential.However,carbonate reservoirs are complex in reservoir types.Those reservoirs are diverse in storage spaces,which include large cave,dissolution holes,tectonic cracks and so on.The storage spaces of carbonate reservoirs mostly are large cave and fracture.Fractures are the main seepage channel.The mechanism and development of those reservoirs are very different from those of traditional reservoirs.So,to study on reservoir infiltration mechanism and mining characteristics of fractured-vuggy carbonate condensate gas reservoir,carry out the production of dynamic simulation experiments and the actual reservoir characteristics or laboratory experiments on the law of the flow,is of great significance to realize the efficient development of fractured-vuggy condensate gas reservoir.This paper is based on the physical simulation experiment,study flow mechanism and production dynamics of the fractured gas reservoir.The effects of different types of reservoirs on the flow pattern and production dynamics and applicability of water injection and gas injection in fractured-vuggy carbonate condensate gas reservoirsare are studied.Analyze the relationship between production flow and production pressure in several reservoir modes.Carried out simulation of production dynamics based on three models.The data of condensate gas production,condensate oil production and reservoir pressure change were analyzed.The material balance equation of the fractured reservoir is established,and used to verify the experimental data.