Currently, there is a worldwide decline in the level of production while maintaining consumption. At same time, newly discovered fields are not able to compensate for volumes extracted oil, since reserves mainly small or medium. In this regard, it relevant introduce technologies increase oil recovery at already drilled and developed fields. A promising method increasing polymer flooding, which ...

With the gradual end of polymer flooding in blocks type II oil reservoirs, scale subsequent water production and injection fields is increasing. As can be seen from production, due to different factors such as reservoir properties injection-production rates, various indicators block vary greatly, which brings difficulties prediction later stage. Therefore, it urgent carry out follow-up research...

Abstract Chemically enhanced oil recovery methods can provide a solution to increase recovery. Of these, surfactant- polymer flooding is common. Efficient selection of polymers and surfactants essential for successful EOR project. Detailed lengthy task that involves number studies. Our goal create fast method based on which the most promising be selected.

The graded viscosity banks technology (tapering) for polymer flooding is studied several different models of mixing zones behavior. Depending on the function limiting injection profile rigorously derived transverse flow equilibrium model, Koval model and Todd-Longstaff model. potential gain in quantity compared to with a finite number slugs numerically estimated.

In this study, we identified and characterized the hydrographic attributes related to the success of recruitment of migratory fishes in the Upper Paraná River floodplain. To achieve our objectives, we analyzed inter-annual variations in the abundance of young-of-the-year (YOY; index of recruitment) of six migratory species and their relations with hydrographic attributes. Recruitment was relate...