Flow experiments with the polyacrylamide-chromium-gel system have shown that a structure of the resistor in a localized area occurs at some distance from the front of the injected gel solution. The age of the solution at the time of development of resistance is less than the beaker gel time. This resistance has been described as in the filtration of pre-gel aggregates, and a linear model on the basis of this mechanism was shown to show that experimental data suggest.
This document describes the extension of the filtration model for the polyacrylamide gel chromium on the simulation of changes in permeability treatments in a wellbore penetrating a stratified reservoir in which there were examined polyacrylamide crossflow The impact on the treatment viability more parameters. The parameters include the permeability case of vertical permeability and thickness, injection pressure, gel-solution viscosity and zonal isolation.
The injection behavior in three successive flow regimes can be divided, is the last of which by relatively longer flow into the zone of low permeability embossed and should be avoided. The treatment is improved by a high permeability contrast, low viscosity gel solution and zonal isolation. Filtration of pre-gel aggregates, polyacrylamide under the right conditions, cross-flow is reduced in the zone with low permeability and thus works to improve gel placement.
Flow experiments with the polyacrylamide-chromium system for a construction of the resistor in a localized area at some distance from the front of the gelant. Several pore volumes of flow through this region occurs gelant to complete blockage of the sand pack. The age of the solution obtainedpolyacrylamide by the zone of the flow resistance substantially lower than the "gel time" of the in a beaker. These trends suggest cause the structure of the flow resistance during in situ gelation not in front of a simple bulk gelation during the displacement. When increasing the flow velocity, penetrates further into the sand gelant packs, but also the male sand packs at a faster rate.
Read MOre:Polyscrylamide sales
This document describes the extension of the filtration model for the polyacrylamide gel chromium on the simulation of changes in permeability treatments in a wellbore penetrating a stratified reservoir in which there were examined polyacrylamide crossflow The impact on the treatment viability more parameters. The parameters include the permeability case of vertical permeability and thickness, injection pressure, gel-solution viscosity and zonal isolation.
The injection behavior in three successive flow regimes can be divided, is the last of which by relatively longer flow into the zone of low permeability embossed and should be avoided. The treatment is improved by a high permeability contrast, low viscosity gel solution and zonal isolation. Filtration of pre-gel aggregates, polyacrylamide under the right conditions, cross-flow is reduced in the zone with low permeability and thus works to improve gel placement.
Flow experiments with the polyacrylamide-chromium system for a construction of the resistor in a localized area at some distance from the front of the gelant. Several pore volumes of flow through this region occurs gelant to complete blockage of the sand pack. The age of the solution obtainedpolyacrylamide by the zone of the flow resistance substantially lower than the "gel time" of the in a beaker. These trends suggest cause the structure of the flow resistance during in situ gelation not in front of a simple bulk gelation during the displacement. When increasing the flow velocity, penetrates further into the sand gelant packs, but also the male sand packs at a faster rate.
Read MOre:Polyscrylamide sales
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