Apparatus and method for physically simulating hydraulic fracturing of radial aperture of loose sandstone

Abstract

The invention relates to an apparatus and a method for physically simulating the hydraulic fracturing of the radial aperture of a loose sandstone. The apparatus for physically simulating the hydraulic fracturing of the radial aperture of the loose sandstone comprises a pumping device, a middle container, a fracturing liquid pipeline, a simulation shaft, a simulation radical aperture, a fracturing test piece and a sound acquisition device. The apparatus , adopting the above technical scheme, has a simple structure, is convenient to use, and presets the radical aperture through adopting a n appropriate technology during experiments in order to guarantee that the porosity in the radical aperture area is obvious than the porosity of a surrounding rock sample and real-time monitoring of the expansion and extension condition of a crack in a test piece during fracturing is avoided.

Description

technical field [0001] The invention relates to a physical simulation method, in particular to a physical simulation device method capable of simulating the radial hole hydraulic fracturing process of unconsolidated sandstone, and simultaneously monitoring and ascertaining the crack initiation position and extension direction of the crack. Background technique [0002] At present, the domestic research on radial drilling technology is mainly in the field of conventional reservoirs, and the research on the basic theory and method of radial drilling three-dimensional development for unconsolidated sandstone reservoirs is still insufficient. At the same time, hydraulic fracturing has been widely used in the process of oil field development, and the results achieved are also remarkable. However, people's understanding of the fractures produced during the fracturing process is still relatively low, such as the location of the crack initiation and the direction of extension of the...

AI Technical Summary

Problems solved by technology

For example, during the experiment, the radial holes were not pre-set by a suitable method, so that the porosity in the radial hole area was not guaranteed to be significantly greater than that of the surrounding rock samples

Furthermore, when the fracturing is over, the observation of the fracture morphology only stays on the surface of the test piece, and there is no real-time monitoring of the crack propagation and extension inside the test piece during the fracturing process.

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