Device for researching fracturing fluid preparation and determining rock fracture fractal characteristics

Abstract

The invention relates to a device for researching fracturing fluid preparation and determining rock fracture fractal characteristics. The device for researching the fracturing fluid preparation and measuring the rock fracture fractal characteristics is formed by connecting a proppant particle multi-stage fractal separation device, a blending system, a pressed test piece determination system and a fracture face self-affine observation system in sequence, wherein a multi-stage separation vibrating screen is arranged inside a separation particle container of the proppant particle multi-stage fractal separation device; the proppant particle container is connected and provided with a plurality of stages of outlets; each stage of outlet is respectively externally connected with a particle conveyer pipeline; the particle conveyer pipeline is connected with a blending container; the blending container is connected with a fracturing string through the pipeline; the pressed test piece determination system comprises a test container, an overlying and external-loading control system, a confining pressure loading system and a deformation test system; a pressed test piece is arranged in the test container; the fracturing string is arranged at the centre of a tested test piece, and the fracture face self-affine observation system mainly comprises a CCD (charge-coupled device) camera, a one-piece microscope, a microscope observation frame and a simulation imaging computation system. According to the device for researching the fracturing fluid preparation and measuring the rock fracture fractal characteristics, a multi-stage fracturing process on site can be simulated, and the relation between different particle sizes of the proppant particles and roughness of fracturing rock fracture wall and the relation between the particle size and fracture opening can be determined.

Description

1. Technical field: [0001] The invention relates to a device used in a fractal design method for hydraulic fracturing sand distribution in oil and natural gas, mining, rock and soil engineering, and specifically relates to a device for studying fracturing fluid preparation and rock mass fracture fractal characteristics measurement. 2. Background technology: [0002] In the field of oil and natural gas, coal rock mass and other reservoir mining technologies, it is necessary to fracturing the reservoir rocks. The liquid is pumped into the well to generate high pressure at the bottom of the well, and the high pressure drives the water flow to squeeze into the rock mass, overcome the tensile strength of the rock mass, cause the rock mass to rupture, and form a fracture channel with a certain conductivity. Effectively communicate reservoirs to increase oil and gas production speed. At present, the description of the roughness of the fracture wall of hydraulically fractured rock ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a device for studying the preparation of fracturing fluid and the determination of rock mass fracture fractal characteristics, which is used to solve the existing problem that the relationship between fracturing fluid and rock mass fracture cracks cannot be measured and described

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