A three-dimensional fracture infiltration device with adjustable gap width and internal visibility

Abstract

The invention provides an internally visible three-dimensional fissure infiltration device with adjustable gap width, which consists of three parts: a permeameter, a gas-liquid supply control system, and a data acquisition and analysis system. The permeameter is mainly composed of five parts: the upper cover steel plate, the silica gel plate, the tempered glass plate, the cellophane attached to the 3D printed rough crack surface, and the lower plate steel plate. A water guide channel is formed between two tempered glass plates with cellophane, and the opening is adjusted with a feeler gauge. The five parts of the permeameter are connected and sealed with high-strength bolts. The gas-liquid supply part adopts electric pressure test pump and high-pressure air pipe to provide pressure, and the control part uses valves to adjust fluid pressure. The seepage pipeline is connected by oxygen hose, and each connection is sealed with a combined gasket. The data acquisition and analysis part includes pressure sensor, flow meter and paperless recorder, and the data is transmitted to the paperless recorder through the pressure sensor and flow meter, and the data acquisition and analysis are completed in the computer.

Description

technical field [0001] The invention relates to the field of an internally visible three-dimensional fracture penetration device with adjustable gap width. Background technique [0002] The existing two-dimensional and three-dimensional fracture seepage devices have certain shortcomings and limitations, mainly in the following aspects: First, the two-dimensional fracture seepage device can only simulate the fracture surface with a flat and smooth surface and low friction, but in actual engineering applications The fracture surface is rough, and it cannot be completely regarded as a two-dimensional smooth plane, so the two-dimensional fracture seepage device cannot truly simulate the flow behavior of the mold fluid on the fracture surface; the second is that the flat structure of the three-dimensional fracture seepage device mostly uses stone slabs to truly simulate the roughness The fracture surface of the material, this material cannot be visualized, the operation is inconv...

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Problems solved by technology

[0002] The existing two-dimensional and three-dimensional fracture seepage devices have certain shortcomings and limitations, mainly in the following aspects: first, the two-dimensional fracture seepage device can only simulate the fracture surface with a flat and smooth surface and low friction, but in actual engineering applications The fracture surface is rough, and it cannot be completely regarded as a two-dimensional smooth plane, so the two-dimensional fracture seepage device cannot truly simulate the flow behavior of the mold fluid on the fracture surface; the second is that the flat structure of the three-dimensional fracture seepage device mostly uses stone slabs to truly simulate the roughness The fracture surface of the material, this material cannot be visualized, the operation is inconvenient, and the cost is high; the third is that for ordinary two-dimensional or three-dimensional fracture devices, the fluid directly enters the permeable fracture after passing through the liquid inlet. During the experiment, the fluid cannot evenly and completely cover the entire fracture, resulting in inaccurate pressure data testing and inability to accurately measure the permeability; fourth, for ordinary two-dimensional or three-dimensional fracture seepage devices, it is difficult to process and manufacture test samples that meet the requirements. Taken, the opening of the sample crack is difficult to control

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