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Large-size and multi-crack simulation device and method for propping agent transportation

A simulation device and multi-fracture technology, applied in the field of oil and gas field development and research, can solve problems such as inconvenience, single fracture shape, uncontrollable fracture distribution shape, etc., and achieve the effect of improving experimental performance and good simulation effect.

Active Publication Date: 2015-04-29
SOUTHWEST PETROLEUM UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For this reason, a patent discloses a multi-fracture simulation experiment device. Although the gap between the simulation experiment and the actual formation situation has been narrowed, it still has defects: the device cannot be controlled during the experiment, which is specifically reflected in the uncontrollable distribution of fractures. , the angle between cracks or the overall crack shape cannot be adjusted, and the simulated crack shape is relatively simple
And more importantly, even if there are individual patents that disclose a variety of crack forms, it is very inconvenient to replace the device parts to realize it.

Method used

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  • Large-size and multi-crack simulation device and method for propping agent transportation
  • Large-size and multi-crack simulation device and method for propping agent transportation
  • Large-size and multi-crack simulation device and method for propping agent transportation

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Embodiment Construction

[0056] of the present invention Figure 1 to Figure 7 The shown structures are only used to help those skilled in the art understand, and are not intended to limit the actual device of the present invention. All the components in the figure are drawn in a simplified manner, which is only for illustration, but this does not affect the description of the present invention, and those skilled in the art should understand.

[0057] The terms involved in the present invention are explained below:

[0058] Proppant is the key material in the fracturing stimulation method in the exploitation of low-permeability oil and gas wells of oil and natural gas. It is generally natural sand or artificial high-strength ceramic particles with a certain particle size and gradation. It plays a role in preventing propped fractures from being closed due to stress release, thus keeping oil and gas flowing.

[0059] Fracturing fluid is the liquid used in fracturing measures using liquid conductivity ...

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Abstract

The invention relates to a large-size and multi-crack simulation device and method for propping agent transportation. The device comprises a crack unit (20), wherein the crack unit (20) comprises a main crack (201) and multi-stage branch cracks (202) arranged on at least one side of the main crack. The device is characterized in that the main crack (201) and the branch cracks (202) are connected through connection parts (203), and the connection parts (203) are provided with control valves (204) which are used for controlling the communicating state between the main crack (201) and the branch cracks. According to the experimental scheme, the control valves (204) are opened or closed, the connection angle between the main crack (201) and the branch cracks (202) is set through angle regulators (205), and the settlement laws of a propping agent in different crack shapes are researched.

Description

technical field [0001] The invention relates to the technical field of oil and gas field development research, in particular to a large-scale multi-fracture simulation device and method for proppant migration. Background technique [0002] As the mining scale of shale gas reservoirs continues to expand, hydraulic fracturing plays a very important role as one of the necessary means to obtain and increase production in shale gas reservoirs. Because the transportation law of proppant in fracture is the key to affect the shape of proppant laying in fracture, it directly determines the final effect of fracturing stimulation. Therefore, it is extremely necessary to study the law of proppant settlement and migration in fractures. The method that is most used and can most objectively reflect the real situation of proppant transport in fractures is the physical simulation experiment of narrow-slit flow, especially the large-scale narrow-slit experimental equipment. [0003] At pres...

Claims

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Application Information

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IPC IPC(8): E21B49/00G01M10/00
CPCE21B49/00G01M10/00
Inventor 杨兆中叶建平赵金洲李小刚张健徐永驰
Owner SOUTHWEST PETROLEUM UNIV
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