Methodology for assessing and predicting the reaction of producers to the conformance control of injectors

UDK: 622.276.432
DOI: 10.24887/0028-2448-2022-9-106-110
Key words: conformance control, chemical enhanced oil recovery methods, additional oil production, injectors, producers, efficiency characteristics, average injection flow rate
Authors: K.M. Fedorov (University of Tyumen, RF, Tyumen), A.P. Shevelev (University of Tyumen, RF, Tyumen), I.V. Vydysh (Tyumen Petroleum Research Center, RF, Tyumen), A.V. Arzhilovsky (Tyumen Petroleum Research Center, RF, Tyumen), D.A. Anuriev (Tyumen Petroleum Research Center, RF, Tyumen), N.A. Morozovskiy (Rosneft Oil Company), K.V. Toropov (Rosneft Oil Company)

The mature fields are characterized by high water cut. One of the reasons for this phenomenon is the breakthrough of water through layers with high filtration characteristics. To solve this problem, low-volume injections of chemical reagents are used for conformance control. Effective use of this technology is impossible without preliminary calculation of the main parameters of such injection. In case of monthly update of geological and technical operations, sector models application is not realistic because of a long setup and a large amount of input data. The article considers the basis for creating an algorithm for designing wells treatment within conformance control using proxy models. The article analyzes the field experience of the use of conformance control at the fields of Rosneft Oil Company. Analysis of approximately 5000 well treatments allowed to select wells with sufficient information scope for subsequent calculations. The criteria for the effectiveness of the application of chemical enhanced oil recovery methods are proposed. The analysis shows that success rate of conformance control operations is more than 70% with average additional oil production 1600 m3. A method for translating the effect of treatment in injectors to producers has been developed. The time interval during which the water cut is restored after treatment is estimated. Statistical processing of data obtained during the injection of polymer-dispersed and sediment-forming compositions is carried out. The dependence of the specific additional production (per 1 m3 of the injected composition) for reacting wells on the conformance control coefficient is given.



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