Kazakhstan journal for oil & gas industryKazakhstan journal for oil & gas industry2707-42262957-806XKMG Engineering10485210.54859/kjogi104852Research ArticleEvaluation and scientific justification of polymer flooding application in the Uzen oilfieldImanbayevBakyt A.imanbayev_b@kaznipi.kzSagyndikovMarat S.sagyndikov_m@kaznipi.kzKushekovRuslan M.ruslan.kushekov@gmail.comTajibayevMaksat O.tajibayev_m@kaznipi.kzBranch of “KMG Engineering LLP” “KazNIPImunaygas”16052022419271403202229032022Copyright © 2022, Imanbayev B.A., Sagyndikov M.S., Kushekov R.M., Tajibayev M.O.2022<p>The Uzen field is at the late stage of development, with an average field water cut of over 90% due to a long-term non-shale waterflooding. At the same time, the current oil saturation of the reservoir is estimated as more than 50%, which may provide a promising future for the field. According to world practice, the application of chemical enhanced oil recovery (CEOR) methods can provide high oil recovery, and extend the cost-effective life of the field. Therefore, the application of chemical enhanced oil recovery is particularly relevant considering the current status of the Uzen field. The main method of CEOR is polymer flooding (PF), which has proven its high efficiency over 60 years of application in the industry.</p> <p>The objective of this study is to evaluate and justify the application of the polymer flooding technology to the conditions of the Uzen field. According to this objective, first of all, the world experience of polymer flooding was studied, including the latest large-scale projects in the fields of China, the USA, Canada, India, Oman and other countries. Criteria for the effective application of polymer flooding were developed and screening of the geological and physical characteristics (GPC) of all objects of the field was carried out. In addition, facies maps and the current state of development were analyzed to select a potential pilot test site. A review of the surface facilities, an analysis of the water supply sources and the characteristics of different polymers were carried out to develop a project for the pilot test of the technology. Preliminary hydrodynamic calculations show reduced water cut, increased oil production and an increase of 7% in oil recovery. Feasibility studies prove the profitability of the polymer flooding at oil prices above $55/bbl. 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