Indoor visual fracturing test device and test method
A fracturing test and test piece technology, applied in the field of physical experiments, can solve problems such as poor crack identification accuracy, cluttered crack positioning, and low scanning resolution.
Active Publication Date: 2022-01-18
INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology
At present, the relatively simple and commonly used fracture detection method is to judge the shape of hydraulic fractures by breaking open the specimen after the fracturing test is over. This method cannot observe the process of crack propagation in real time, so it is difficult to quantitatively analyze the test results.
[0004]Currently commonly used fracture shape detection methods include acoustic emission positioning and CT scanning. When multiple acoustic emission probe arrays are used to locate the shape of hydraulic fractures, the fracture The positioning is often a messy scattered point, the regularity is not strong, and the accuracy of the reconstructed fracture shape is poor; and CT scanning can only scan the specimen after the fracturing test is completed, and the specimen with a size of more than 15cm However, the scanning resolution is often low, and the identification accuracy of the small cracks initiated by the fracturing of the specimen is poor, and the cost is high
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[0036] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0037] The specific implementation of the present invention will be described in detail below in conjunction with specific embodiments.
[0038] Such as Figure 3 ~ Figure 4 As shown, an indoor visual fracturing test device provided by an embodiment of the present invention includes a transparent cubic test piece 8, and the upper, lower and front sides of the transparent cubic test piece 8 are provided with common pads 1, transparent The left side of the cube test piece 8 is provided with a hole array spacer 2, the LED light array 6 is installed on the hole array spacer 2, and the right side of th...
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The invention relates to the technical field of physical experiments, and particularly relates to an indoor visual fracturing test device and test method. The indoor visual fracturing test device comprises a transparent cubic test piece, wherein common cushion blocks are arranged on the upper side, the lower side, the front side and the rear side of the transparent cubic test piece; a hole-containing array cushion block is arranged on the left side of the transparent cubic test piece; an LED lamp array is mounted on the hole-containing array cushion block; a detachable cushion block is arranged on the right side of the transparent cubic test piece; a camera is placed in the detachable cushion block; an artificial shaft is arranged on the side wall, on the same side with the hole-containing array cushion block, of the transparent cubic test piece; and the artificial shaft is connected with a liquid injection pump through a liquid injection pipeline. The indoor visual fracturing test device and test method have the beneficial effects that the hydraulic fracture propagation process can be visually and quantitatively observed in real time in a fracturing test, so that the real-time fracture length and width distribution characteristics of the whole fracture are constructed, and the dynamic characteristics of fracture propagation are obtained by combining a pump injection pressure curve.
Description
technical field [0001] The invention relates to the technical field of physical experiments, in particular to an indoor visual fracturing test device and test method. Background technique [0002] my country has huge reserves of unconventional oil and gas reservoirs such as shale gas, tight sandstone gas, and shale oil, which account for an increasing proportion of my country's oil and gas production. Unconventional oil and gas reservoirs have extremely low permeability, and hydraulic fracturing must be used to form artificial fractures in the reservoir, so that oil and gas in tight reservoirs can flow into the wellbore through fractures and be extracted. [0003] Hydraulic fracturing is an important measure to improve the recovery of low-permeability oil and gas reservoirs, and indoor fracturing test research is an important means to study fracture propagation. At present, the relatively simple and commonly used fracture detection method is to judge the shape of hydraulic ...
Claims
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Login to View More IPC IPC(8): E21B43/26E21B47/002E21B49/00
CPCE21B43/26E21B47/0025E21B49/00
Inventor郭印同周再乐黄浩勇桂俊川周辉杨春和应琪祺郭武豪常鑫王磊杨涵志毕振辉赵国凯吴小龙
OwnerINST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI