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应用自行设计的气体溶解度测定装置 ,在 3 5℃~ 75℃温度下 ,不同压力范围内 ,分别测定了甲烷 ( 2 .5~ 2 2 .0MPa) ,CO2 ( 1.5~ 6.0MPa) ,N2 ( 5 .0~ 2 0 .0MPa) ,天然气 ( 2 .5~ 2 2 .8MPa)在大庆原油中的体积溶解度 .各气体在原油中的溶解度随着压力的增加而增大 ,但天然气、甲烷和N2 增加的幅度越来越小 ,而CO2 增加的幅度越来越大 .天然气、甲烷和CO2 的溶解度随温度的升高而减小 ,N2 的溶解度随温度的升高而增加
The gas solubility of methane (2.5 ~ 2.02MPa), CO2 (1.5 ~ 6.0MPa) and N2 (5) were measured in different pressure ranges from 35 ℃ to 75 ℃ using the self-designed gas solubility measuring device. .0 ~ 200MPa) and natural gas (2.5 ~ 228.8MPa) in Daqing crude oil.The solubility of each gas in crude oil increases with the increase of pressure, but natural gas, methane and N2 The increasing range is getting smaller and smaller, while the increasing range of CO2 is increasing.The solubility of natural gas, methane and CO2 decreases with the increase of temperature, and the solubility of N2 increases with the increase of temperature