A test device and test method for simulating multi-scale branched fractures in shale
A branch fracture and test device technology, which is applied in earthwork drilling, wellbore/well components, buildings, etc., can solve the problems of large differences and low reference value of results, and achieve the effect of convenient adjustment process
Active Publication Date: 2022-05-17
SOUTHWEST PETROLEUM UNIV
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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 the angles between adjacent branch fractures are variable and the widths of branch fractures are different. structure, there is a big difference between the test working conditions and the actual working conditions, and the low reference value of the results
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[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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The invention discloses a test device and a test method for simulating multi-scale branch cracks in shale. There are a plurality of crack simulation plug-in boards, and each crack simulation plug-in board includes: The front panel and the rear panel, and after the two are fastened, a branch crack is formed between the front panel and the rear panel, and a hollow prism for connecting two adjacent branch cracks is connected between the adjacent two rear panels, and the front panel and the bottom of the rear panel are fixed with supporting legs; the slit width adjustment component is fixedly connected between the front panel and the rear panel, and is used to adjust the width of the branch slit. The present invention realizes arbitrary angle setting between multiple branch fractures through hollow prisms to form multi-scale branch fractures, thereby realizing the simulation of proppant laying rules in multi-scale branch fractures, which is closer to the actual construction and mining conditions, and the accuracy of the obtained test data Higher, providing theoretical support for increasing mining volume.
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...
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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