Measurement method of matching between microspheres and pore throats of oil reservoir

Abstract

The invention discloses a measurement method of the matching between microspheres and pore throats of an oil reservoir. The measurement method comprises the following steps: preparing microsphere dispersion systems with a preset mass concentration; arranging a nuclear pore membrane on a filtering-membrane supporting plate which is arranged at the lower part of a container; taking out the microsphere dispersion system with a first preset volume in the container from the prepared microsphere dispersion systems; controlling the pressure in the container to be the preset pressure, standing for 0.5-4 minutes, switching on a valve arranged at the lower end of the container, acquiring a time parameter when the microsphere dispersion system with a second preset volume flows out of the microsphere dispersion systems, and according to the time parameter, acquiring a blocking parameter of the microsphere dispersion system. The measurement method disclosed by the invention has the advantages that the matching between the microspheres and the pore throats of the oil reservoir can be accurately measured, high-efficiency spreading control is further realized and the utilization efficiency of injected water is improved.

Description

technical field [0001] The invention relates to the technical field of oilfield water injection development, in particular to a method for measuring the compatibility between microspheres and reservoir pore throats. Background technique [0002] The profile control technology is to block the high-permeability zone of the injected water, so that the subsequent injected water will flow around, thereby increasing the swept volume of the water injection, achieving the control of interlayer, intralayer and plane heterogeneity of the reservoir, and improving the effect of water injection development the goal of. The particle size range of the microsphere profile control agent is adjustable, the apparent viscosity is low, and it is easy to enter the deep part of the reservoir. Through the process of temporary plugging-breakthrough-re-temporary plugging-re-breakthrough of reservoir pore throats, it increases the resistance of large pore throats and at the same time , Injected water...

AI Technical Summary

Problems solved by technology

[0003] The profile control mechanism of microsphere profile control agent on reservoir pore throat temporary plugging-breakthrough-temporary plugging-rebreakthrough determines its plugging characteristics are related to whether its particle size matches the reservoir pore throat size. Only when the particle size of the ball matches the pore throat size in the reservoir can a good profile control effect be achieved, but there is no corresponding measurement method in the prior art to measure the matching between the microsphere profile control agent and the reservoir pore throat , so there is an urgent need for a method for measuring the matching of microsphere profile control agents and reservoir pore throats

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