The paper describes the results of pilot field tests in the conditions of AV1(1-2) formation of the Samotlor field testing an enhanced oil recovery (EOR) technology (SPA-Well technology) with the use of the domestic polymer gel AC-CSE-1313. This formation has a «Ryabchik» structure; it also has a complex geological structure, high compartmentalization and layered heterogeneity, as well as high current water cuts of wells. The paper highlights key points of the new SPA-Well treatment technology. The polymer-gel used in this technology was developed as a part of an import substitution to replace the expensive imported polymers which are widely used in the physical-chemical EOR. The pilot treatment results are presented and are the following: the water cuts of production wells actually decreased down by 1,1 to 4,9 %, the effect time for individual wells is from 2 to 18 months, incremental oil production due to increased oil recovery amounted to 985 t/well job. The technology which was tested in complex geological structures of the pilot area proved to be cost-effective. The actual incremental oil production exceeded the expected volume by more than 2,5 times. The technology can be recommended for replication and further implementation in the studied reservoir and in similar ones.
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