{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T15:54:08Z","timestamp":1791302048496,"version":"4.1.0"},"reference-count":30,"publisher":"American Chemical Society (ACS)","issue":"39","license":[{"start":{"date-parts":[[2026,9,22]],"date-time":"2026-09-22T00:00:00Z","timestamp":1790035200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,10,6]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>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.<\/jats:p>","DOI":"10.1021\/acsomega.6c07870","type":"journal-article","created":{"date-parts":[[2026,9,22]],"date-time":"2026-09-22T06:02:08Z","timestamp":1790056928000},"page":"60234-60245","source":"Crossref","is-referenced-by-count":0,"title":["Optimization of\nPolymer-Flooding Parameters and Front\nPropagation Behavior in the Central-Western Block I of the Lanan District"],"prefix":"10.1021","volume":"11","author":[{"given":"Yanchang","family":"Su","sequence":"first","affiliation":[{"name":"The Sixth Oil Production Plant, Daqing Oilfield Co., Ltd. , ,","place":["Daqing, China, 163114"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ming","family":"Yu","sequence":"additional","affiliation":[{"name":"Geological Research Institute of the Sixth Oil Production Plant, Daqing Oilfield Co., Ltd. , ,","place":["Daqing, China, 163114"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0007-9742-1504","authenticated-orcid":true,"given":"Fushan","family":"Li","sequence":"additional","affiliation":[{"name":"Northeast Petroleum University , , ,","place":["Daqing, China, 163318"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xin","family":"Jin","sequence":"additional","affiliation":[{"name":"Geological Research Institute of the Sixth Oil Production Plant, Daqing Oilfield Co., Ltd. , ,","place":["Daqing, China, 163114"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tong","family":"Pei","sequence":"additional","affiliation":[{"name":"Geological Research Institute of the Sixth Oil Production Plant, Daqing Oilfield Co., Ltd. , ,","place":["Daqing, China, 163114"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0009-4701-2686","authenticated-orcid":true,"given":"Ende","family":"Zhan","sequence":"additional","affiliation":[{"name":"Northeast Petroleum University , , ,","place":["Daqing, China, 163318"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0008-7517-5194","authenticated-orcid":true,"given":"Junfeng","family":"Wang","sequence":"additional","affiliation":[{"name":"Northeast Petroleum University , , ,","place":["Daqing, China, 163318"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hailian","family":"Tao","sequence":"additional","affiliation":[{"name":"Northeast Petroleum University , , ,","place":["Daqing, China, 163318"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Banghui","family":"Zhao","sequence":"additional","affiliation":[{"name":"Northeast Petroleum University , , ,","place":["Daqing, China, 163318"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yanfu","family":"Pi","sequence":"additional","affiliation":[{"name":"Northeast Petroleum University , , ,","place":["Daqing, China, 163318"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"316","published-online":{"date-parts":[[2026,9,22]]},"reference":[{"issue":"2","key":"2026100610472504100_cit1","doi-asserted-by":"publisher","first-page":"215","DOI":"10.1016\/S1876-3804(08)60029-4","article-title":"Pore Structure Features\nof Reservoirs at Late High Water-Cut Stage Lamadian Oilfield Daqing\nChina","volume":"35","author":"Lin","year":"2008","journal-title":"Pet. 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