AI Article Synopsis
- A temperature-sensitive gel made from natural cellulose was developed to enhance water control in medium and high water cut oil reservoirs, addressing limitations of conventional gels like high chemical doses and poor temperature resistance.
- Tests showed the gel retained up to 95% viscosity after being subjected to high temperatures (90-120 °C) for 50 days and demonstrated effective gelation in medium- to low-salinity calcium chloride water.
- The gel exhibited strong elastic properties, a sealing rate of 97%, and good stability due to strong hydrogen bonding, suggesting it could significantly improve oil recovery in challenging reservoirs.
Article Abstract
In order to use intelligent gel systems to realize deep source water control in medium and high water cut reservoirs, and also to solve the shortcomings of conventional gels, such as the high chemical dose required, large profile control radius, poor temperature resistance, shear resistance, and plugging performance, a temperature-sensitive gel based on natural cellulose was developed, and the temperature resistance, rheological performance, and plugging performance of the temperature-sensitive gel were tested and evaluated. The results show that the system can maintain a viscosity retention rate of up to 95% after high-temperature aging at 90-120 °C for 50 days. When using medium- to low-salinity calcium chloride formation water for preparation, the gelation effect is good. The rheometer oscillation frequency scanning test shows that the system gel is a strong elastic body dominated by elasticity. The core displacement experiment shows that the highest sealing rate of the system is 97%, and the breakthrough pressure can reach 2.5 MPa at this time. The microstructure of the gel system was tested by infrared, and it was found that the gel system had strong hydrogen bonding and the gel had good stability. The research results contribute to improving the recovery rate of high water cut oil reservoirs.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11593796 | PMC |
| http://dx.doi.org/10.3390/gels10110742 | DOI Listing |
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