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An experimental device and method for carbon dioxide directional fracturing and permeability testing

A carbon dioxide, directional fracturing technology, applied in measuring devices, using stable tension/pressure to test material strength, permeability/surface area analysis, etc. To achieve the effect of real measurement results and convenient operation

Active Publication Date: 2022-08-02
NORTHEASTERN UNIV LIAONING
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Problems solved by technology

However, the existing directional fracturing technology mainly adopts hydraulic fracturing technology, and the mechanism and effect of supercritical carbon dioxide directional fracturing technology on shale reservoirs are still unclear; on the other hand, under the formation conditions, the existing test The device cannot simultaneously and accurately perform supercritical carbon dioxide directional fracturing experiments and permeability tests before and after directional fracturing

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  • An experimental device and method for carbon dioxide directional fracturing and permeability testing
  • An experimental device and method for carbon dioxide directional fracturing and permeability testing
  • An experimental device and method for carbon dioxide directional fracturing and permeability testing

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Embodiment Construction

[0032] In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

[0033]Thus, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skil...

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Abstract

The invention belongs to the technical field of unconventional natural gas development experiments, and discloses an experimental device for carbon dioxide directional fracturing and permeability testing, including a gas source system, an in-situ environment simulation system and a pulse testing system. The core specimen provides an experimental environment for simulating the real formation temperature and stress state. The gas source system is used to provide the test gas source to the in-situ environment simulation system, as well as the gas source for the fracturing core specimen. The pulse test system is used to Core specimens are pulsed to obtain permeability. It realizes supercritical carbon dioxide directional fracturing shale experiments under simulated formation conditions, and can test the core (axial and radial) permeability before and after fracturing in situ. Compared with traditional experimental methods and experimental equipment, it is more intelligent. , convenient operation, etc., and the in-situ environment simulation system simulates the field working conditions more realistically, so that the measurement results are more real and accurate.

Description

technical field [0001] The invention belongs to the technical field of unconventional natural gas development experiments, in particular to an experimental device and method for carbon dioxide directional fracturing and permeability testing. Background technique [0002] Shale gas has great development prospects in my country. However, conventional hydraulic fracturing is not ideal for the exploitation of many shale gas reservoirs. Supercritical CO 2 Fracturing technology can overcome many shortcomings of conventional hydraulic fracturing and has good application prospects. Further, the directional fracturing technology of radial prefabricated fractures through shale drilling can control the initiation and propagation of fractures in a predetermined direction to achieve Anti-reflection effects in specific areas of the reservoir. However, the existing directional fracturing technology mainly adopts hydraulic fracturing technology, and the permeability enhancement mechanism a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/08G01N3/12
CPCG01N15/0826G01N3/12G01N2203/0019G01N2203/0044
Inventor 朱万成刘书源张秀凤魏晨慧
Owner NORTHEASTERN UNIV LIAONING
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