PROCEDURE FOR TREATMENT OF UNDERGROUND RESERVOIR USING RHEOLOGICAL MODEL FOR OPTIMISATION OF FLUID MEDIUM Russian patent published in 2011 - IPC E21B43/26 C09K8/68 

FIELD: oil and gas production.

SUBSTANCE: procedure for treatment of underground reservoir consists in prediction of multitude of scenarios of reservoir treatment for fluid medium containing polymer and cross-linker with usage of model of rheological properties of fluid medium. The procedure also includes input of data on concentration of polymer and cross-linker, of temperature profile, of pressure and rate of shear during treatment. Further, the procedure consists in determination of concentration of cross-linking and rheology of fluid medium on base of concentration of cross-linking, in selection of scenario for treatment facilitating optimal rheological properties of fluid medium, in preparation and pumping fluid medium into borehole, and in reservoir treatment. According to another version the treatment procedure for underground reservoir consists in predicting multitude of scenarios of reservoir treatment including formulation of fluid medium and schedule of supply of said medium containing polymer and cross-linker with usage of the model of rheological properties. Also, the procedure consists in input of data on concentration of polymer and cross-linker. There is selected a scenario of treatment facilitating optimal rheological properties of fluid medium. Fluid medium is prepared and is pumped into a well, and the underground reservoir is treated. According to one more version the treatment procedure for underground reservoir consists in predicting multitude of scenarios of reservoir treatment including formulation of fluid medium and schedule of supply of said medium containing polymer and cross-linker with usage of the model of rheological properties. Also, the procedure consists in input of data on concentration of polymer. There is selected a scenario of treatment facilitating optimal rheological properties of fluid medium. Fluid medium is prepared and is pumped into a well, and the underground reservoir is treated. The invention is developed in dependent points of formula.

EFFECT: raised efficiency of treatment of carbon containing reservoirs.

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