| Institute of Geomechanics, Chinese Academy of Geological Sciences | Host |
| Citation: |
SUN Yanze, PENG Xiaobo, WEN Zhigang, HE Wenxiang, YAN Gang, LIU Xu, ZHONG Ming, TIAN Weichao. 2022. Study on influencing factors of oil-water partition coefficient of phenolic compounds. Journal of Geomechanics, 28(2): 217-225. doi: 10.12090/j.issn.1006-6616.2021176
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Study on influencing factors of oil-water partition coefficient of phenolic compounds
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Abstract
Alkylphenols are a kind of compounds produced by alkylation of phenolic compounds. Compared with other non-hydrocarbon compounds, alkylphenols are more soluble in water. In this paper, through three groups of oil-water distribution experiments at different temperatures (25 ℃, 45 ℃ and 65 ℃), different brine concentrations (4000 mg/L, 6000 mg/L and 8000 mg/L) and different crude oil types (X37, X45 and X61), the distribution characteristics of alkylphenols between oil and water were studied, and the variation law of alkylphenol distribution coefficient was determined. The results show that the oil-water partition coefficient increases with the increase of alkyl molecular weight of homologues; The oil-water partition coefficient of alkylphenols decreases with the increase of temperature, and alkyl homologues with higher molecular weights are more sensitive to temperature; The partition coefficient of alkylphenol in oil-water system increases with the increase of water salinity. According to the experimental results, temperature and salinity of water phase will cause the difference of oil-water partition coefficient of alkylphenol, and the influence of temperature is greater than that of salinity. The distribution behavior of alkylphenols between oil and water can provide more reference for the secondary migration of crude oil and the direction of water drive front in reservoir development.
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Keywords:
- alkylphenol /
- oil-water partition coefficient /
- oil-water ratio /
- moisture content
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References
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SUN Yanze, PENG Xiaobo, WEN Zhigang, HE Wenxiang, YAN Gang, LIU Xu, ZHONG Ming, TIAN Weichao. 2022. Study on influencing factors of oil-water partition coefficient of phenolic compounds. Journal of Geomechanics, 28(2): 217-225. doi: 10.12090/j.issn.1006-6616.2021176
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Figure 1.
Location and stratigraphic information of the Suizhong 36-1 Oilfield in the Liaodong Bay depression
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Figure 2.
Mass chromatograms of X37, X45 and X61 crude oil from the Suizhong 36-1 Oilfield
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Figure 3.
Reaction formula of alkylphenol and BSTFA (Zhang et al., 2009)
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Figure 4.
Mass chromatogram of phenolic compounds after silanization (peak number is shown in Table 1)
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Figure 5.
Oil-water partition coefficients of alkylphenols under different temperatures (The water salinity is 4000 mg/L)
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Figure 6.
Oil-water partition coefficients of alkylphenols under different salinities (The temperature is 65 ℃)
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Figure 7.
Oil-water partition coefficients of alkylphenols from crude oil with different contents of non-hydrocarbon (The temperature is 65 ℃, and the water salinity is 4000 mg/L)