Wellbore-fracture experimental system and experimental method for simulating injection of fracturing fluid

An experimental system, a technology for simulating wellbore, applied in the field of rock hydraulic fracturing, which can solve the problems of simulated fluid loss and insufficient research results.
CN112727424AActive Publication Date: 2021-04-30CHINA UNIV OF PETROLEUM (BEIJING)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA UNIV OF PETROLEUM (BEIJING)
Publication Date
2021-04-30

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Abstract

The invention discloses a wellbore-fracture experimental system and experimental method for simulating injection of fracturing fluid. The experimental system comprises a plurality of shells, a simulation wellbore, a data acquisition device and a fluid injection device, wherein each shell is provided with a fluid outlet and a fluid inlet, a first chamber and a second chamber are arranged in each shell, each first chamber is filled with a fracture model, each fracture model comprises a fracture, each fracture has roughness in a fluctuating state relative to the horizontal plane, a plurality of first pressure sensors are arranged in the extending direction of each fracture, each fracture communicates with the corresponding second chamber, and each second chamber is filled with rock for simulating a reservoir matrix; the simulation wellbore is connected with the multiple shells, a drill hole communicating with the fluid inlets of the shells is formed in the side wall of the simulation wellbore, and a plurality of second pressure sensors are arranged in the simulation wellbore; and the fluid injection device is used for injecting the fracturing fluid into the simulation wellbore. The wellbore-fracture experimental system and experimental method can be used for studying the pressure propagation characteristics and the filtration effect in the wellbore and the fractures and the influence of the fracture roughness on pressure propagation.
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Description

technical field

[0001] The present application relates to the technical field of rock hydraulic fracturing, in particular to a wellbore-fracture experimental system and an experimental method for simulating fracturing fluid injection. Background technique

[0002] Tight rock reservoirs belong to the type of unconventional oil resources, and they mostly occur in unconventional reservoirs with low porosity and low permeability. Due to the tightness and low permeability of the reservoir, it brings great difficulty to the development of the reservoir. At present, fracturing technology is usually used to improve the permeability of the reservoir.

[0003] Fracturing technology is to inject fracturing fluid into the formation during the process of oil or gas production, and artificially create fractures in the formation, thereby improving the flow conditions at the bottom of the oil well and increasing the production of the oil well. Pulse circulation hydraulic fracturing is a ne...

Claims

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