The article is devoted to the selection and application of flow redirecting technologies at the development sites of the Vankorskoye field by RN-Vankor LLC.
The first part of the article discusses the possibility of planning and applying enhanced oil recovery methods, and also analyzes the criteria for the applicability of these EOR in the conditions of the Vankorskoye field. The issues of the choice of flow redirecting technologies and their improvement are considered, taking into account a number of features, such as large compartmentalization, high permeability and permeability heterogeneity of reservoirs, as well as the development of a network of horizontal and directional wells. Shown are the results of laboratory development and pilot testing of technology based on three-dimensionally crosslinked partially hydrolyzed acrylamide polymers. Watering routes for production wells have been established. Based on the results of laboratory tests, the processing design was selected, which includes recipes for the preparation of rims and the processing sequence. Taking into account the experience of the live application of gel polymer compositions in the Vankorskoye field, the well treatment design has been improved. The technique of selection of candidate wells by the method of parametric ranking of waterflooding elements is described. The data on technological efficiency from the impact on injection wells, as well as data on the number of treatments and coverage of the fund in the implementation of the program for the use of flow diverting technologies are presented. The periods of the first tests in 2016, replication in 2017 at the Yak-3-7 deposit of the Vankorskoye field are considered.
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