A simplified model for simulations of alkaline–surfactant–polymer floods

摘要: Abstract A common method of enhanced oil recovery is alkaline–surfactant–polymer (ASP) flooding where a solution alkali, surfactant, and polymer injected followed by drive. Many crude oils contain naphthenic acids that react with the alkali to form soap in-situ. With proper selection an surfactant mixes in-situ, sufficiently low interfacial tension can be achieved mobilize residual oil. However, ASP complex since it involves chemical reactions depend on composition, water rock mineralogy, temperature, pH, etc. Mechanistic simulations typically involve large number calculate consumption due ion exchange clay micelles as well other minerals brines. This approach computationally intensive. After full mechanistic model was developed validated, simplified implemented in 3D reservoir simulator. In model, amount calculated using total acid phase behavior mixing rule optimum salinity solubilization ratio mixtures. Other key mechanisms modeled are adsorption function concentration. Several corefloods were successfully model. Based these results, field pilot performed. this particular case, results comparable those obtained from more complete set geochemical reactions. The practical convenient way simulate applications for such cases.