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Fracturing fluid rheological proppant transport simulation method and stepless adjustable fracture width test device

A simulation method and fracturing fluid technology, applied in the field of simulation experiments, can solve problems such as failure to realize fracture expansion and closure, fixed fracture devices cannot be simulated, and simulation is not targeted, so as to save image stitching processing work and simple operation The effect of no danger and simple structure

Active Publication Date: 2016-05-11
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Application Information

AI Technical Summary

Problems solved by technology

The fixed fracture device cannot simulate the impact of the dynamic change process of the fracture on the fracturing fluid and proppant, and cannot realize the expansion and closure of the fracture. It is not targeted for the simulation of different formations and different fracturing degrees.

Method used

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  • Fracturing fluid rheological proppant transport simulation method and stepless adjustable fracture width test device
  • Fracturing fluid rheological proppant transport simulation method and stepless adjustable fracture width test device
  • Fracturing fluid rheological proppant transport simulation method and stepless adjustable fracture width test device

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with drawings and embodiments.

[0027] The invention provides a fracturing fluid rheological proppant migration simulation method, comprising the following steps:

[0028] (1) A vertically placed rear panel is arranged behind the vertically placed transparent observation window. The rear panel and the transparent observation window are sealed by brackets to form an observation cavity. The rear panel is not parallel to the transparent observation window. The distance between the rear panel and the transparent observation window The closer side is the fracturing fluid flow input side, and the side farther away from the rear panel and the transparent observation window is the fracturing fluid flow output side; a horizontal screw is set in the observation chamber, and the screw is connected to the wedge-shaped slider through threads, so that The wedge-shaped slider moves along the screw, the front of the ...

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Abstract

The invention provides a fracturing fluid rheological proppant transport simulation method and a stepless adjustable fracture width test device. The device comprises a transparent observation window, a back panel, a screw rod and a wedge-shaped sliding block, wherein input holes are longitudinally formed in the input side of the back panel and output holes are longitudinally formed in the output side of the back panel; and an observation cavity is communicated with a material supply device through a first multi-pass pipe arranged on the input side and a second multi-pass pipe arranged on the output side. According to the method and the device, the simulation of a large-section crack is realized through the movable sliding block, the change of the crack can be subjected to stepless regulation, the liquid-solid flow state change in the crack in a fracturing environment can be effectively simulated, and more direct reference data is provided for fracturing fluid formula optimization and proppant selection, so that a fracturing fluid and a proppant can be optimized; and for the flow change of coal bed gas and shale gas fracturing fluids in the crack and the sanding effect monitoring, measurement data can reflect a fracture forming effect of the fracturing fluid and a coal bed gas and shale gas fracturing process is optimized.

Description

technical field [0001] The invention relates to a fracturing fluid rheological proppant migration simulation method and a stepless adjustable fracture width testing device, belonging to the field of simulation experiments. Background technique [0002] Coalbed methane and shale gas, as unconventional natural gas, account for an increasing proportion in the national energy system. As an effective construction technology, water-based fracturing plays a decisive role in the mining of coalbed methane and shale gas, and is the most mature and effective mining method today. Fracturing fluid, as the medium for formation fracturing, plays the role of fracture creation, penetration and sand carrying. Fractures serve as gas production channels, and their width and proppant filling determine the gas production rate of a single well. In actual construction, poor sand-carrying effect of fracturing fluid often leads to insufficient filling in fractures, resulting in closure of fractures ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00E21B43/267E21B47/002E21B47/06E21B47/00
CPCE21B43/267E21B47/00E21B47/06E21B49/00E21B47/002
Inventor 乌效鸣张峰蒋国盛高辉吴川郑文龙黄河
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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