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《Drilling & Production Technology》 2009-03
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INFLUENCE OF LOW PERMEABILITY POROUS MEDIUM ON PHASE STATE OF CONDENSATE GAS SYSTEM WITH HIGH CONDENSATE OIL CONTENT

WANG Zhouhua1,2,GUO Ping2,ZHONG Bin1,LUO Tao1,ZHANG Peidong3 and YANG Tao4(1.Exploration and Development Research Institute,Southwest Oil and Gas Field Branch;2.State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University;3.Shengli Oilfield Downhole Operation Co.;4.Gas Production Technology Research Institute,Southwest Oil and Gas Field Branch)  
The influence of low permeability porous medium on phase state of condensate gas system was studied.The experiment used the real low permeability core and condensate gas sample with high gas condensate content(containing gas condensate:364g/m3)both of which come from Qiaobai gas field in Zhongyuan to research the effects of the porous media and original water saturation on gas condensate saturation and residual oil saturation and that the porous media on dew pressure of condensate gas.The research results showed that dew pressure of condensate gas measured in porous media is higher testing value of PVT.To the same core with the same condensate gas sample,the residual oil saturation declines with the increasing original water saturation when the pressure is depleted to atmospheric pressure.Gas condensate flow and re-evaporation in porous media are more obvious than in PVT and residual oil saturation of gas condensate is lower than measured in PVT in the process of depletion.To condensate gas with low condensate oil content,residual oil saturation measured in core is higher than in PVT.Therefore,the pollution caused by gas condensate must be considered.
【CateGory Index】: P618.13
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