Evaluation of interfacial tension between ASP solution and crude oil from B oil field |
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Authors: | Peng Lv |
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Affiliation: | CNOOC EnerTech-Drilling and Production Company, Tianjin, China |
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Abstract: | The interfacial tension (IFT) between alkali-surfactant-polymer (ASP) solution and crude oil is an important parameter for evaluating the feasibility of the ASP flooding for an oil field. The IFT between six series of ASP solution and crude oil from B oil field were measured at 65°C. Each series of ASP solution was composed of NaOH or Na2CO3, one of the three kinds of surfactants (S1, S2, and S3), and polymer FT60. The concentration of FT60 and surfactant were 1500 and 2000 mg/L, respectively. The research results show that the IFT between ASP solution and crude oil is ultra-low in the NaOH-FT60-S2 series and NaOH-FT60-S3 series and the best concentration of NaOH is 4000 mg/L and 8000 mg/L, respectively. NaOH-FT60-S2 series is more suitable for B oil field. The IFT between ASP solution and crude oil is ultra-low in the Na2CO3-FT60-S2 series and the best concentration of Na2CO3 is 4000 mg/L. |
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Keywords: | ASP concentration crude oil interfacial tension surfactant |
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