Method and device for dynamic liquid measurement of permeability of oil and gas reservoir rock

Abstract

The invention discloses a method and a device for dynamic liquid measurement of permeability of oil and gas reservoir rock. The method comprises the following steps of: applying periodic pulse pressure to fluid injected into a rock core by adopting a pulse displacement generation unit; measuring the pressure difference between two ends of the rock core; and determining the rock permeability basedon a Darcy law formula considering inertia. According to the method and the device, the periodic pulse pressure is applied to the injected fluid, and the Darcy law considering the inertia is obtained,so that the lack of understanding of the fluid fluidity change condition of the reservoir rock under external excitation of different frequencies is made up, the relationship between the rock permeability and the frequency change can be established through experimental observation, and the fluid fluidity is improved by utilizing the frequency of the external periodic pulse pressure correspondingto the peak permeability. Moreover, the scheme has universality in engineering, the influence of different rock gap structures and fluid components on the dynamic permeability can be obtained only byreplacing a rock core sample and/or fluid, and implementation and operation are convenient.

Description

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AI Technical Summary

Benefits of technology

The present technology uses periodically applied stress or compression waves to enhance oil production from subterranean formations by creating fractures within rocks during drilling operations. This results in improved hydrocarbon transport efficiency compared with conventional methods like water flooding techniques without adding any extra equipment.

Problems solved by technology

This patents discuss various technical methods used during exploration or drilling operations involving subterranean formations such as shale layers. These techniques aimed at increasing the perviousness of these strata without causing damage caused by excessive water production. However, previous studies showed that even small holes called imperfections tend to affect the permafrost properties over longer periods due to their movement along with other factors like temperature variations. Therefore, it was necessary to develop new ways to measure both physical and chemical parameters associated with the perforated areas while maintaining good quality control measures.

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