A determination method for reducing fluid seepage resistance based on nanotechnology

Abstract

The present invention provides a method for determining fluid seepage resistance based on nanotechnology, including step 1, dividing the injection process into three stages according to the injection fluid and injection time of the actual work area, namely the initial injection stage, nano solution injection stage and replacement fluid injection stage; step 2, according to seepage Darcy's law and injection time, determine the total cumulative injection volume of fluid in the reservoir under the condition of different injection time in each stage in each of the three stages; step 3, according to The linear relationship between the total cumulative injection volume of the fluid and the time integral of the injection pressure determines the slope of the injection resistance curve in the three stages; Step 4, respectively determines the resistance coefficient of the fluid in the reservoir during the nano-solution injection stage and the replacement fluid injection stage The residual resistance coefficient of the fluid in the reservoir; step five, according to the relative size relationship between the two resistance coefficients described in step four, evaluate the effect of nanotechnology on reducing resistance and increasing injection. The determination method is accurate, reliable and practical.

Description

technical field [0001] The invention relates to the technical field of water injection development of water injection wells, in particular to a determination method for reducing fluid seepage resistance based on nanotechnology. Background technique [0002] At present, problems such as high water injection pressure of water injection wells in offshore oil reservoirs, frequent operations, and failure to meet injection requirements have seriously restricted the development effect of oil reservoirs and the improvement of reserves production. The reduction of particles available for dissolution cannot further improve the plugging removal effect, and the effective period of the measures is greatly shortened. It is urgent to develop a new nano long-term augmented injection technology. [0003] Nano-injection technology is a synthetic nano-scale polysilicon drag-reducing material. There are unsaturated residual bonds and hydroxyl groups in different bonding states on the surface. T...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of lack of characterization methods for the effect of nanotechnology measures, to provide a method that can accurately and reliably evaluate the influence of nanomaterials on the change of fluid seepage resistance in the reservoir during the process of nano-injection technology measures, and to determine the effect of nanotechnology measures. How to determine the effect of injection

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