Influence of Weak Hydrophobic Interactions on in Situ Viscosity of a Hydrophobically Modified Water-Soluble Polymer
| Autor: | Tormod Skauge, Ketil Djurhuus, Alette Løbø Viken, Roland Reichenbach-Klinke, Kristine Spildo |
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| Rok vydání: | 2017 |
| Předmět: |
chemistry.chemical_classification
In situ Materials science Concentration dependence General Chemical Engineering Energy Engineering and Power Technology 02 engineering and technology Polymer 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Hydrophobic effect Fuel Technology chemistry Rheology Chemical engineering Enhanced oil recovery 0210 nano-technology Water soluble polymers |
| Zdroj: | Energy & Fuels. 32:89-98 |
| ISSN: | 1520-5029 0887-0624 |
| DOI: | 10.1021/acs.energyfuels.7b02573 |
| Popis: | Polymers are attractive enhanced oil recovery (EOR) chemicals that improve sweep and accelerate production. There is an ongoing search for polymers that are more temperature-, salinity-, and shear-stable as fields in increasingly challenging environments open to EOR methods. This paper investigates one type of hydrophobically modified polyacrylamides (HMPAM), which has promising properties. This weakly hydrophobic PAM-based polymer has been characterized with regard to in situ viscosity and rheological properties. The polymer shows similar viscosity as HPAM with regard to shear and concentration dependency but exhibits significantly higher in situ viscosity. The enhanced in situ viscosity can be ascribed to flow-induced hydrophobic interactions and not permeability reduction, as is often reported. In situ rheology is concentration-dependent and between 1000–3000 ppm, the polymer changes flow behavior from near-Newtonian to rheo-thinning. This gel-like behavior cannot be explained from bulk measurements as... |
| Databáze: | OpenAIRE |
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