Test device and test method for simulating multi-scale branch cracks of shale

A branch fracture and test device technology, applied in the direction of earthwork drilling, production fluid, wellbore/well components, etc., can solve the problems of large differences and low reference value of results

Active Publication Date: 2021-06-25
SOUTHWEST PETROLEUM UNIV
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  • Application Information

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Problems solved by technology

However, most of the existing branch fracture test devices for simulating branch fractures adopt a design with fixed angles between multiple branch fractures and fixed widths of branch fractures, which are different from those in actual formations where th

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  • Test device and test method for simulating multi-scale branch cracks of shale
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  • Test device and test method for simulating multi-scale branch cracks of shale

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Embodiment Construction

[0056] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0057] see Figure 1-Figure 7 , the embodiment of the present invention discloses a test device for simulating multi-scale branched fractures in shale, including:

[0058] There are multiple crack simulation plug boards 1, and each crack simulation plug board 1 includes: a front panel 11 and a rear panel 12 that are fastened to each other, and after the two are fastened, the front panel 11 and the rear panel 12 are formed with a branch crack 13, and a hollow ...

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Abstract

The invention discloses a test device and a test method for simulating multi-scale branch cracks of shale. The test device comprises a plurality of crack simulation plug boards and a crack width adjusting assembly, wherein each crack simulation plug board comprises a front panel and a rear panel which are buckled with each other, branch cracks are formed between the front panel and the rear panel after the front panel and the rear panel are buckled, a hollow prism for communicating two adjacent branch cracks is connected between two adjacent rear panels, and supporting foot stands are fixed at the bottom ends of the front panel and the rear panel; and the crack width adjusting assembly is fixedly connected between the front panel and the rear panel and used for adjusting the width of the branch cracks. According to the test device and the test method, any angle setting among the plurality of branch cracks is realized through the hollow prisms to form the multi-scale branch cracks, so that simulation of the laying rule of a propping agent in the multi-scale branch cracks is realized, the simulation is closer to the actual construction and mining working condition, the obtained test data precision is higher, and theoretical support is provided for increasing the mining amount.

Description

technical field [0001] The invention relates to the technical field of oil and gas field exploitation test devices, in particular to a test device and a test method for simulating multi-scale branched fractures in shale. Background technique [0002] Hydraulic fracturing technology is widely used as a necessary means of developing unconventional oil and gas resources such as shale oil and shale gas. The technical principle is to form oil and gas channels with high conductivity in the reservoir by artificial fractures, thereby improving the permeability of the reservoir and increasing oil and gas production. Natural fractures and beddings are developed in shale reservoirs. When hydraulic fractures expand, they will bifurcate, divert, stop, or pass through weak bedding planes to form natural fractures or weak bedding planes to form a complex fracture network. The effective placement of proppant in the complex fracture network is the key to forming larger propped fracture volu...

Claims

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Application Information

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IPC IPC(8): E21B49/00E21B43/267E21B47/002
CPCE21B49/00E21B43/267
Inventor 李小刚杨兆中赵金洲舒鸫锟陈浩廖梓佳
Owner SOUTHWEST PETROLEUM UNIV
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