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Multi-cluster synchronous fracturing visual simulation device, system and manufacturing method

A technology for simulating devices and manufacturing methods, which can be used in teaching models, earthwork drilling, mining fluids, etc., and can solve problems such as obtaining characteristics of difficult fracturing fluids

Active Publication Date: 2020-11-17
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The embodiment of the present application provides a multi-cluster synchronous fracturing visualization simulation device, system, manufacturing method and test method, which solves the problem of different fracturing fractures formed after single-cluster or double-cluster fracturing experiments in the prior art. It is difficult to obtain the flow distribution of fracturing fluid in multi-cluster fractures and the characteristics of fracture dynamic expansion process to meet the needs of research on multi-cluster fracture propagation mechanism.

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  • Multi-cluster synchronous fracturing visual simulation device, system and manufacturing method

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Embodiment 1

[0032] This embodiment provides a multi-cluster synchronous fracturing visualization simulation device, which is suitable for studying different cluster spacing, different cluster numbers (one initial fracture corresponds to a prefabricated crack initiation position, which is one cluster), different fracturing fluid types, Effects of different fracturing fluid displacements and in-situ stress characteristic parameters on the synchronous initiation and dynamic expansion of multi-cluster fractures.

[0033] The device at least includes: a transparent sample, a camera, and a simulated casing. The structural relationship between each structure and the structure will be described in detail below, as follows:

[0034] Transparent samples are used to simulate tight oil and gas reservoir rocks. They are set in the true triaxial fracturing testing machine. When selecting transparent samples, the mechanical characteristics of the transparent samples are suitable for the simulated rock fo...

Embodiment 2

[0048] This embodiment provides a multi-cluster synchronous fracturing visualization simulation system, including:

[0049] True triaxial fracturing testing machine;

[0050] hydraulic fracturing systems;

[0051] The multi-cluster synchronous fracturing visualization simulation device according to any one of the above-mentioned embodiment one;

[0052] Among them, during the test, the multi-cluster synchronous fracturing visualization simulation device is set in the true triaxial fracturing testing machine, and the true triaxial fracturing testing machine is used to apply the formation three-dimensional stress to the multi-cluster synchronous fracturing visualization simulation device;

[0053] The hydraulic fracturing system is connected with the simulated casing of the multi-cluster synchronous fracturing visualization simulation device, and is used to pump preset fracturing fluid into the simulated casing.

[0054] The above-mentioned technical solutions in the embodimen...

Embodiment 3

[0057] Such as figure 1 As shown, this embodiment provides a method for manufacturing a multi-cluster synchronous fracturing visualization simulation device according to any one of Embodiment 1, including:

[0058] Step S101: According to the mechanical characteristics of the simulated rock formation, select a specific material for making the transparent sample.

[0059] Step S102: According to the size of the true triaxial fracturing testing machine, use a specific material to make a transparent sample, wherein, during the test, the transparent sample is accommodated in the true triaxial fracturing testing machine, and the true triaxial fracturing test The machine is used to apply formation three-dimensional stress to the transparent sample.

[0060] As an example, the specific material is plexiglass, which is cut and processed into a rectangular parallelepiped fracturing standard sample of 300mm×300mm×600mm according to the sample specification for true triaxial fracturing ...

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Abstract

The invention discloses a multi-cluster synchronous fracturing visual simulation device, system, manufacturing method and test method. The device comprises a transparent sample, a camera and a simulation casing. A blind hole is formed in the transparent sample in the horizontal direction. Initial cracks are prefabricated in the transparent sample. The number of the initial cracks is a preset number. Every two adjacent initial cracks are spaced by a preset distance. A prefabricated drill hole which is concave inwards is formed in the wall surface of the transparent sample. The camera is fixedlyarranged in the prefabricated drill hole. The simulation casing is fixedly arranged in the blind hole. Jet holes are formed in the positions, corresponding to the crack openings of the initial cracks, of the simulation casing. A first end of the simulation casing is a blind end, and a second end of the simulation casing is used for being connected with a hydraulic fracturing system. According tothe multi-cluster synchronous fracturing visual simulation device, system, manufacturing method and test method, the problem that in the prior art, the flow distribution of a fracturing fluid in multi-cluster fracturing cracks and the characteristics of the fracturing fluid in the dynamic expansion process of cracks is difficult to obtain is solved.

Description

technical field [0001] The invention relates to the technical field of unconventional tight sandstone reservoir reconstruction, in particular to a multi-cluster synchronous fracturing visualization simulation device, system, manufacturing method and testing method. Background technique [0002] Unconventional oil and gas resources (including shale gas, tight sandstone gas, coalbed methane, etc.), as an efficient and high-quality clean energy, are the best choice for low-carbon consumption. However, unconventional oil and gas resources are characterized by low reservoir porosity and low permeability. In order to achieve efficient mining, artificial fracture networks must be generated through fracturing to form commercial development. Drill wells in blocks with well-developed natural fractures, and then use hydraulic fracturing technology to form artificial fractures to communicate with natural fractures to obtain oil and gas flow channels with high conductivity and high-yiel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/26E21B47/00G09B25/04E21B47/002
CPCE21B43/26E21B47/00G09B25/04
Inventor 郭印同周俊郭武豪常鑫王磊侯龙飞张晓宇杨涵志
Owner INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI