Petroleum Reservoir Evaluation and Development >
2020 , Vol. 10 >Issue 3: 23 - 27
DOI: https://doi.org/10.13809/j.cnki.cn32-1825/te.2020.03.003
Experiment and characterization on phase behavior of CO2 and crude oil in porous media
Received date: 2020-02-07
Online published: 2020-07-03
In tight reservoirs with low permeability, the effect of porous media on fluid phase behavior can not be ignored. Therefore, the experiments of fluid phase behavior in PVT cylinder and porous media at different conditions of the dissolution gas and the permeability values are established based on full diameter core holder. The results show that the bubble point pressure of crude oil in porous media is lower than that in PVT cylinder. The difference between these two conditions become more evident as the dissolution gas volume becomes lower or the permeability becomes smaller. Based on the above results, the specific value of the diameter of hydrocarbon components and the average diameter of rock pore space is introduced into the function a（T）, modifying the classic SRK EOS equation and proposing the prediction model to calculate the parameters of crude oil in porous media. The simulation results are in good agreement with the experimental data. Furthermore, the EOS and characterized method are modified and established.
Key words： CO2 and crude oil; phase behavior; porous media; prediction model; modified EOS
Yanbo JIANG . Experiment and characterization on phase behavior of CO2 and crude oil in porous media[J]. Petroleum Reservoir Evaluation and Development, 2020 , 10(3) : 23 -27 . DOI: 10.13809/j.cnki.cn32-1825/te.2020.03.003
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