Device and method for measuring permeability of rock in fracturing process

Abstract

The invention discloses a device for measuring the permeability of rock in a fracturing process. The device comprises a triaxial test chamber (1), a core gripping device, a carbon dioxide cylinder (2), a flow monitoring device, a hydraulic oil confining pressure loading system (3) and a computer (4), wherein the hydraulic oil confining pressure loading system (3) comprises an oil pump, a booster pump and an oil tank; the core gripping device comprises a core gripper (11), an air cushion (12), an insulating self-adhesive sealing tape (13) and a thermal shrinkable sleeve (14); an air inlet (15) connected with an air inlet valve (9) and an air outlet (16) connected with an air outlet valve (10) are formed in the upper end and the lower end of the core gripper (11) respectively; the carbon dioxide cylinder (2) is connected with the air inlet valve (9); and the flow monitoring device comprises a glass burette (17) and a rubber hose (18). The invention further discloses a measuring method. The device provided by the invention has the beneficial effects of convenience and easiness in refitting, safety and simplicity in operation, small measuring error, high working efficiency and high utilization ratio of carbon dioxide.

Description

technical field [0001] The invention relates to the technical field of petroleum development, in particular to a device and a method for measuring permeability in the process of rock fracture. Background technique [0002] With the continuous development of domestic oil and gas field development and the continuous expansion of overseas business, the technical requirements for the development of unconventional special oil and gas reservoirs at home and abroad are getting higher and higher. The use of hydraulic fracturing to develop unconventional oil and gas resources has long been widely concerned by all walks of life. A comprehensive understanding and grasp of the changes in mechanical parameters and rock permeability during the process of hydraulic fracturing when rocks are subjected to three-dimensional stress loads until they rupture provides an important basis for formulating oil and gas field development plans and guiding on-site construction. [0003] The formation en...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem that the permeability of existing rocks is difficult to measure in the process of three-dimensional stress loading to fracture, and to provide a measurement method that is convenient and easy to refit, safe and simple to operate, small in measurement error, high in work efficiency and high in carbon dioxide utilization. Apparatus and method for permeability in rock fracture process

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