Water control in sandstone rocks using polyethyleneimine cross-linked polymer gels
A polymeric gel, composed of an ionic terpolymer comprising acrylamide groups, vinylpyrrolidone, and ionic moieties, in conjunction with polyethyleneimine, was utilized to investigate water control within porous media. The gel was prepared using synthetic brine with salinity of 250,000 ppm of total...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-07-01
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| Series: | Desalination and Water Treatment |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1944398625004072 |
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| Summary: | A polymeric gel, composed of an ionic terpolymer comprising acrylamide groups, vinylpyrrolidone, and ionic moieties, in conjunction with polyethyleneimine, was utilized to investigate water control within porous media. The gel was prepared using synthetic brine with salinity of 250,000 ppm of total dissolved salts, predominantly sodium chloride and calcium chloride. Its rheological properties were evaluated after a 72-day exposure at 160 °C, with the maximum viscosity reaching 82,400 cP on the 14th day. The water retention capacity of the gel was quantified by its swelling percentage, recorded at 558 %. Fluid control experiments were conducted in a fractured Berea sandstone core at 130 °C, with efficiency assessed based on differential pressure data. A batch injection of 0.5 pore volumes of the gelling system, followed by an aging period of 75 h at 130 °C within the core, facilitated in situ gel formation, thereby establishing a physical barrier to brine flow at a rate of 1 mL/h, achieving an efficiency of up to 90 %, although the differential pressure changed from 0.2 to 2.7 psi. |
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| ISSN: | 1944-3986 |