Flow tests, polymer adsorption

In region FG the polymer is completely amorphous and the properties of the tested polymer- molecular probe solution can be investigated. Care must be taken to ensure that any contribution from surface adsorption is taken into account. For non-crystaUine polymers, liquid-like behavior is observed from point C onward. The location of point C on the temperature axis depends both on the tested polymer- molecular probe system considered and on chromatographic conditions, film thickness, and flow rate. 

Abstract. Numerous single-phase flow and oil recovery tests were carried out in unconsolidated silica sands using C14 tagged hydrolyzed polyacrylamide solutions. The polymer retention data from these flow tests are compared to the adsorption data obtained from static adsorption tests. 

The present study investigates the adsorption and trapping of polymer molecules in flow experiments through unconsolidated oil field sands. Static tests on both oil sand and Ottawa sand indicates that mineralogy plays a major role in the observed behavior. Effect of a surfactant slug on polymer-rock interaction is also reported. Corroborative studies have also been conducted to study the anomalous pressure behavior and high tertiary oil recovery in surfactant dilute-polymer systems(ll,12). 

In this section, the relevant laboratory tests that should be carried out on polymers in support of a proposed polymer pilot will be described. Virtually all of the actual technical points concerning polymer properties—such as compatibility/stability, filterability and formation plugging, polymer solution preparation, adsorption in porous media, in-situ rheology—have been discussed in detail elsewhere in this book. However, earlier the objective was to present an explanation and a view on the science of the various phenomena involved in polymer physics and chemistry both in bulk solution and in flow through porous media. Here, the intention is to abstract the much more limited subset of experiments that should be carried out in support of a practical polymer flood application in the field. In all of the discussion below, it is assumed that a range of commercially available off-the-shelf polymers... 

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