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.

Active Publication Date: 2021-04-30
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

The applicant found that when the fracturing fluid spreads in the fractures set on the plate, the fluid loss cannot be simulated according to the fluid loss of the fracturing fluid in the homogeneous reservoir under real conditions, resulting in insufficient research results

Method used

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

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Embodiment Construction

[0036] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope. After reading the present invention, those skilled in the art will understand the present invention Modifications of various equivalent forms fall within the scope defined in the present application.

[0037] It should be noted that when an element is referred to as being “disposed on” another element, it may be directly on the other element or there may also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions are for the purpose of illustration on...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/26E21B49/00E21B47/06E21B47/00
CPCE21B43/26E21B47/00E21B47/06E21B49/00
Inventor 彭岩徐向东侯亚南张广清李世远马智骁王一博
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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