Device for testing influence of multiphase flow on tensile strength of rock
A technology of tensile strength and test equipment, applied in the direction of applying stable tension/pressure to test the strength of materials, etc., can solve the problems of inability to evaluate the influence of multiphase flow on rock tensile strength, and inability to measure liquid breakthrough pressure, etc.
Inactive Publication Date: 2012-10-03
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology
[0003] At present, hydraulic fracturing devices widely used in China can only measure the tensile strength of rocks. In addition to the shortcomings of not being able to evaluate the influence of multiphase flow on the tensile strength of rocks, they cannot also measure the breakthrough pressure of liquids in rocks.
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[0027] The present invention will be described in further detail below according to accompanying drawing:
[0028] according to figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 It can be seen that a model test device for the influence of multiphase flow on the tensile strength of rock consists of a pressurized joint 1, a lifting ring 2, a cylinder head 3, a reciprocating piston 4, a cylinder body 5, a back pressure joint 6, a sealing ring 7, and a balance weight 8. Internal pressure unloading adapter 9, pore water pressure loading adapter 10, bell jar 11, upper platen 12, ring-shaped embedded clay plate pad 13, hollow cylindrical sample 14, sealing ring 15, BQ120-10BA Type resistance strain gauge 16, annular porous plate 17, base 18, lead screw 19, GCT type manual hoist 20, YP-150 type disc trolley 21, confining pressure loading screw hole 22, internal pressure loading screw hole 23, pore water Pressure loading screw hole 24, pore air pressure loading screw hole 2...
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Abstract
The invention discloses a device for testing the influence of a multiphase flow on the tensile strength of a rock. A pressing joint is communicated with an axial pressure loading pump, a cylinder cover is respectively connected with the pressing joint and a cylinder body, the cylinder body is connected with a bell jar, an upper pressing plate is provided with an internal pressure unloading switching joint which is respectively communicated with the cavity of a hollow cylinder sample and an internal pressure unloading screw hole, the upper pressing plate is provided with a pore hydraulic pressure loading switching joint which is respectively communicated with a clay plate and a pore hydraulic pressure loading screw hole in an annular cushion block embedded with the clay plate, a base is appressed with an annular perforated plate, the bell jar is connected with the base, the base is connected with a disc trolley, the hollow cylinder sample is connected with a lead screw rod, the lead screw rod is connected with a data acquisition instrument, a pore air pressure loading screw hole is respectively connected with a gas guiding hole and a gas-phase loading pump, and the base is connected with the disc trolley by virtue of a fixed screw rod. The device provided by the invention is reasonable in structure and is easy to operate, can realize the migration process of the multiphase flowin the rock under a certain condition and can be applicable to a model test used for testing the influence of the multiphase flow on the tensile strength of the rock.
Description
technical field [0001] The invention relates to the field of rock mechanics, and more specifically relates to a model test device for testing the influence of multiphase flow on the tensile strength of rock, which is suitable for the model test of the influence of multiphase flow on the tensile strength of rock. Background technique [0002] The multiphase flow in the rock can change the relative permeability of the rock, and further change the mechanical properties of the rock. Therefore, the multiphase flow has become an important factor that must be considered in energy extraction and storage, and waste storage. The exploitation of shale gas uses hydraulic fracturing to increase the production of shale gas, the influence of multiphase flow of saline water layer on the tensile strength of caprock during the geological storage of carbon dioxide, and the selection of underground natural gas storage. On the one hand, the solution to the above problems needs to be continuousl...
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IPC IPC(8): G01N3/10
Inventor 李小春魏宁王燕鲁建荣白冰
Owner INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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