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• W1963556585 abstract "Abstract Field control and regulate of water flooding during field development essentially determine effectivity of oil production. The process of moving water front into reservoir may be recognized by analyzing fall off pressure curves (CFP) in the wells stopped after durable injecting or by registrating reaction of production wells on changing the regim of injecting during waterflooding, or due fixsate the time appearing injected water in the production wells. Recodring CFP after shut in an injector well and analyzing the results may be used for determine parameters of formation as nearby of injector well, so in far zones directed from this well. In the last years there are appeared many publications deal with process of water flooding where pointed out that there may be hydraulic fracturing of formation in nearby of injector. There are different opinions on this process: one consider that fractures are created like hydraulic fracturing made for intensification of production wells with creating only one fracture, having two wins; another consider that after during long time pumping with high pressure there may be created many fractures and than appeared high pearmeability zone near wellbore. But obvious, that both variants deal with improve rate of pumping in injector wells. It well known and third opinion, that during pumping water in the injector well there may be created some fractures with complex configurations, which propogated from injector to production well. It like to electric discharge between two points with different charge. It's usually one argumented for one or another sheme of hydraulic fracturing with analyzing date of CFD. The CFD had interpretated made like interpretation CPD (S-type form pressure build-up curves). But any concrete configuration of CFD may be considered by different authors as one, second or third process. The main task of this paper is studding process of injecting water in the wells for different variants intensifications wells, studding process of moving the front of water in the formation and determine the time when water reaches the production well, studding process of moving fluids (water with oil) in water flooding zone. The analysis based on solutions of diffusion equation for a radial flow of filtration in the finite difference shape. There were simulated situations with pumping water in the well and than closed well for registration CFP and fixing transient process. The configurations of curves (CFP), received with simulation, like the selected model of filtration. The analysis of real CFP, received in oilfield conditions, demonstrated that most of practical curves like on theoretical curves for reservoir with high permeabylity near wellbore zone (fractured zone). After durable pumping that zone may increasing it's space (more than 100 meters). We developed method of calculate characteristics of zones, surrounded of injector well. Some different oilfield examples considered in this paper. Introduction During water flooding in a reservoir the saturation of collector is changing in connection with water drive. The final index of development, deriving maximal production depends on displacement efficiency. The process of water flood essentially determines also programs of regulation of flow water in the production output wells: or connected with applying of isolating materials, or - with selective insulation, or - with implementation of measures on limitation of inflows of water." @default.
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• W1963556585 date "2008-10-28" @default.
• W1963556585 modified "2023-10-15" @default.
• W1963556585 title "Determining The Regimes Of Oil Field Flooding Based On The Analysis Of Pressure Reduction Curves In Shutdown Injection Wells" @default.
• W1963556585 doi "https://doi.org/10.2118/117368-ms" @default.
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