Visual test method and system for simulating rough single-cross fracture multiphase seepage

A technology of intersecting fractures and multiphase seepage, applied in the direction of measuring devices, instruments, and material analysis through optical means, can solve the problem of unstudied rough fracture acquisition, not multiphase fluid displacement, no test equipment and test methods, etc. question

CN111811995AActive Publication Date: 2020-10-23CHINA UNIV OF GEOSCIENCES (BEIJING)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2020-10-23

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Abstract

The invention provides a visual test method and system for simulating rough single-cross fracture multiphase seepage, wherein the test method comprises the following steps: S10, collecting a rock masssample on site, carrying out the statistics of the roughness of a fracture surface, and determining fractal characteristic parameters; S20, outputting a three-dimensional rough fracture model grid file; S30, preparing transparent or opaque three-dimensional rough fracture model samples with different roughness; S40, assembling a test device according to a single-fracture or cross-fracture test object; S50, simulating a fluid displacement process under the action of pressure difference, and carrying out a rough fracture medium multiphase displacement test; S60, collecting test data; and S70, arranging and analyzing the multiphase seepage characteristics of the rough fractured medium. The displacement mechanism of multiphase fluid in the fractures with different roughness and opening degrees can be systematically studied, and certain guiding significance is achieved for study of the water seal mechanism of a rough fractured rock mass of an underground water seal oil depot.
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Description

technical field

[0001] The invention relates to the technical field of underground water-sealed caverns, in particular to a visual test method and system for simulating multiphase seepage in rough single-intersecting fissures. Background technique

[0002] The underground water-sealed oil depot is one of the best ways to store oil. During its construction and operation, the reliability of the water seal is the object that needs to be paid attention to. Most of the underground water-sealed oil depots are built in the granite body, and the seepage of the granite body mainly occurs in the cracks of the rock mass. Therefore, the water seal of underground water-sealed oil storage can be generalized as a dynamic process of mutual displacement of water, oil and gas in fractured media.

[0003] The surface of natural granite cracks has a certain roughness. The fBm method is a mathematical model proposed by Mandelbrot and Ness, which can be used to describe irregular surfaces such a...

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Embodiment Construction

[0052] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0053] In describing the present invention, it is to be understood that the terms "comprises / comprising", "consisting of" or any other variation thereof are intended to cover a non-exclusive inclusion such that a product, device, A process or method includes not only those elements, but may also include other elements not expressly listed, or elements inherent in such a product, apparatus, process, or method, as required. Without further limitations, an element defined by the phrase "comprising / comprising...", "consisting of... does not exclude the...