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Novel true triaxial fracturing seepage test device and method

A test device and fracturing test technology, applied in the direction of measuring device, applying stable tension/pressure to test material strength, permeability/surface area analysis, etc., can solve the problem that porous rock specimens with pore pressure cannot be fractured, etc.

Inactive Publication Date: 2020-06-12
TAIYUAN UNIV OF TECH
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Problems solved by technology

[0005] The present invention is a new true triaxial fracturing seepage test device and method, which solves the disadvantage that existing devices cannot fracture porous rock specimens with pore pressure, and truly realizes the measurement of anisotropic permeability before and after fracturing under in-situ conditions

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  • Novel true triaxial fracturing seepage test device and method
  • Novel true triaxial fracturing seepage test device and method
  • Novel true triaxial fracturing seepage test device and method

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Embodiment Construction

[0034] In the above-mentioned new true triaxial fracturing seepage test device and method, the device first removes the built-in fracturing cavity as a whole through the manual rocker, and puts the cube test piece saturated with the fluid that has been drilled into the fracturing wellbore into the fracturing chamber. Then put the test piece inside the fracturing cavity, and move the test piece into the pressure chamber of the fracturing overall frame by the manual rocker; secondly, arrange the pressure sensor in the pressure pipeline and the temperature sensor in the fracturing chamber. crack the bottom of the wellbore, and measure the working state of the instrument to ensure the operating state of the instrument; place the porous loading steel plate between the built-in oil cylinder and the test piece, and arrange 8 acoustic emission probes to be placed on the edge of the test piece respectively, and through the external The oil cylinder applies load step by step, and then co...

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Abstract

The invention discloses a novel true triaxial fracturing seepage test device and method, and belongs to the field of rock mechanics and oil-gas reservoir exploitation. The device is characterized by mainly comprising a model system (1), a hydraulic fracturing system (2), a triaxial stress loading and control system (3), a pressure measurement system (4), a temperature control system (5), a seepage-pressurization system (6), a pipe valve system (7), a data acquisition and processing system (8), an acoustic emission system (9), an operation table (10), a composite phase state fluid monitoring system (11) and the like. The experimental device can simulate the true triaxial fracturing process of fracturing the porous rock with the pore pressure by different fracturing media under the in-situ condition, consider the interaction influence of formation fluid and the fracturing media, simulate the fracturing process of the reservoir with the natural gas, and solve the problem that existing equipment can only fracture the porous rock with the zero pore pressure. In addition, the fracturing seepage equipment achieves anisotropic permeability measurement by metering the flow in different directions and combining the upstream and downstream pressure difference, and then the permeability values before and after fracturing are compared to determine the anisotropic fracturing effects of different fracturing media.

Description

technical field [0001] A new true triaxial fracturing seepage test device and method of the present invention belong to the field of rock mechanics and oil and gas reservoir development, and are mainly suitable for true triaxial fracturing of porous rocks with pore pressure under different fracturing media under in-situ conditions and measuring various The study of anisotropic permeability focuses on revealing the fracture initiation and propagation law and anisotropic fracturing effect characteristics of porous rocks with pore pressure in different fracturing media, and realizes the fracturing test simulation under the interaction between fracturing media and formation fluid. Background technique [0002] my country's unconventional oil and gas resources are very rich, but due to its low permeability characteristics, the reservoirs need to be fractured to achieve economical exploitation. In addition to the widely used hydraulic fracturing technology, anhydrous (dry) fractur...

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Application Information

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IPC IPC(8): G01N3/18G01N3/12G01N3/02G01N15/08
CPCG01N3/18G01N3/12G01N3/02G01N15/0826G01N15/0806G01N2203/0003G01N2203/0019G01N2203/0048G01N2203/0062G01N2203/0226G01N2203/0232G01N2203/0242G01N2203/0256G01N2203/0641G01N2203/0658G01N2203/0676G01N2203/0694
Inventor 梁卫国姜玉龙李文达武鹏飞
Owner TAIYUAN UNIV OF TECH
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