Transport link 188bet cho dien thoai oil/water partitioning components during water injection
Summary
The oil/water partitioning components such as alkylphenols and aliphatic acids naturally exist in crude oil compositions at different initial concentrations link 188bet cho dien thoai hundreds or even thousands link 188bet cho dien thoai ppm depending on the location link 188bet cho dien thoai the reservoir compared to the site link 188bet cho dien thoai original rocks. During contact with sweeping injection brine, those compounds diffuse from oil phase to water phase due to oil/water partitioning behaviours. As a result, their concentration in oil contacting with water will be attenuating during water injection. Their concentration profile in water injection history contains the information related to diffusion in oil and water phase, interstitial velocity link 188bet cho dien thoai water and oil saturation.
This paper presents the research results link 188bet cho dien thoai theoretical model and numerical model link 188bet cho dien thoai the washed-out process link 188bet cho dien thoai alkylphenols in the late stage link 188bet cho dien thoai water injection. The research results have proposed approximate analytical expression for concentration link 188bet cho dien thoai alkylphenols at the late stage link 188bet cho dien thoai water flooding. In this regard, at the sufficient large injection volume the alkylphenol concentration attenuates exponentially and the attenuation rate depends on parameters such as partitioning coefficient, oil saturation and interstitial velocity link 188bet cho dien thoai water and oil and diffusion coefficients. The simulation concentration results obtained from UTCHEM simulator for the 5-spot model showed a good match with analytical calculation results.
The research results can be used as the basis for developing methods to assess water flooding systems as well as oil saturation. The results can also be used for study link 188bet cho dien thoai transport link 188bet cho dien thoai non-aqueous phase liquid (NAPL) in environmental contamination.
Keywords: Residual oil saturation, waterflooding, tracer, partitioning organic compounds, enhanced oil recovery.
