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Mechanism of shales stabilization by hydrophobized poly(ethylene glycol)/K+ in water-base drilling fluids
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VILLABONA-ESTUPIÑAN Santiago,de ALMEIDA RODRIGUES JUNIOR Jorge,de ABREU Carolina Ferreira,NASCIMENTO Regina Sandra Veiga
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Table 4. Langmuir simulation parameters and correlation coefficients of adsorption experiment with or without KCl.
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| PEG | K+ | No K+ | | Qmax | KL | R2 | Qmax | KL | R2 | | mg/g | μmol/g | L/mg | L/μmol | mg/g | μmol/g | L/mg | L/μmol | | PEG2000 | 210.8 | 105.4 | 2.963×10-1 | 5.924×10-1 | 0.854 2 | 246.5 | 123.2 | 6.27×10-3 | 12.54×10-3 | 0.924 8 | | mPEG2000-OA | 262.9 | 116.1 | 2.591×10-2 | 5.867×10-2 | 0.972 1 | 282.2 | 124.6 | 8.59×10-3 | 19.45×10-3 | 0.915 1 | | OA-PEG2000-OA | 292.1 | 115.5 | 4.782×10-1 | 1.209×10-1 | 0.994 9 | 309.6 | 122.4 | 5.98×10-3 | 15.13×10-3 | 0.957 4 |
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