ArticleACS omega2026
Optimization of Polymer-Flooding Parameters and Front Propagation Behavior in the Central-Western Block I of the Lanan District.
Article in ACS omega, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
To clarify the propagation behavior of the polymer-flooding front in highly heterogeneous, high-water-cut reservoirs, polymer-system screening, plugging-performance evaluation, and one-dimensional and three-dimensional saturation-monitoring displacement experiments were conducted for the central-western Block I of the Lanan District. The results showed that both HPAM-1 and HPAM-2 exhibited good viscosity-enhancing performance and injectability. The 2,000 mg/L HPAM-2 system exhibited the best plugging performance in the high-permeability layer, with a plugging rate of 80.5%, effectively mitigating uneven interlayer flow distribution. One-dimensional experiments showed that polymer flooding improved the utilization of the low-permeability layer and reduced interlayer differences in front propagation. Compared with the 1,800 mg/L HPAM-2 system, the 2,000 mg/L HPAM-2 system delayed front breakthrough in the high-permeability layer from 0.8 PV to 1.0 PV and achieved an incremental recovery factor of 20.82%, with a combined recovery factor of 65.91%. Three-dimensional experiments showed that the polymer-flooding front still preferentially advanced through high-permeability regions, while the oil saturation in low-permeability regions was further reduced, thereby improving areal sweep efficiency. The incremental recovery factor during polymer flooding reached 14.14%, and the final recovery factor reached 57.75%. These findings provide an experimental basis for optimizing polymer-flooding parameters in similar highly heterogeneous, high-water-cut reservoirs.
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