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Gimaletdinov R.A.,Gazprom | Sidorenko V.V.,Gazprom | Fakhretdinov R.N.,Multifunctional Company ChemServiceEngineering LLC | Bobylev O.A.,Multifunctional Company ChemServiceEngineering LLC | And 2 more authors.
Neftyanoe khozyaystvo - Oil Industry | Year: 2015

Considering the current state of Gazprom Neft JSC fields under development, one of the main guidelines to increase the efficiency of initially recoverable reserves is industrial introduction of methods for enhanced oil recovery. In conditions of increased water flooding in order to influence less permeable areas of the productive formation it is necessary to limit water filtration in washed out areas and to redistribute filtration flows. This can be achieved with the help of conformance control technologies. A special methodology has been worked out to select sites for conformance control. Validation criteria were defined. Successful application of these methods has been confirmed by well operations performed on the sites of Gazprom Neft JSC in 2013-2014.

Vinohodov M.A.,Gazpromneft | Yarkeev A.R.,Gazpromneft | Kuznetsov M.A.,Slavneft Megionneftegas JSC | Ishkinov S.M.,Slavneft Megionneftegas JSC | And 6 more authors.
Neftyanoe Khozyaystvo - Oil Industry | Year: 2016

Application of baffled or injectivity profile leveling technology for reservoir is classically associated with increase of reservoir sweep effect. The considered injectivity profile leveling technology with the use of AS-CSE-1313 mark A reagent has a complex mechanism of influence based on the change in coverage rates and the increasing ratio of oil displacement. There are dispersed particles in working solution, which are the focal points of the reinforced gel formation. The solid reinforced screen formation is at the first stage in high-permeability reservoir intervals. At the second stage in low permeability reservoir intervals the reinforced globules dispersed in a pore space: it is a process of residual oil displacement. The new mechanism in reservoir, aimed at increasing oil recovery factor (ORF), is confirmed by numerous laboratory tests and field work. Gel-forming AC-CSE-1313 technology tested in different geologicalphysical conditions of the West Siberia fields, is found to be successful and at the stage of industrial implementation. The competitive advantages compared with the known polymer systems are determined during technology implementation. At all wells during injection the pressure rise was not observed, which is one of the positive factors in comparison with the injected polymer systems. The results of composition filtration test on the parallel core holder confirmed the composition impact selectivity based on AC-CSE-1313 grade A reagent and its using possibility in water shutoff technologies for production wells. The additional oil resources are involved in active development as a result of complex mechanism by AC-CSE-1313 grade A, there is stabilization of oil production at fields located in a mature stage of development with high water cut of oil production, and natural decline in oil production.

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