Heat-fluid-solid coupling numerical simulation method for high-temperature fracture-cavity type reservoir

A numerical simulation, heat-fluid-solid technology, applied in CAD numerical modeling, electrical digital data processing, special data processing applications, etc., can solve the problems affecting the energy and mass transfer of fractured porous media
CN112100941APending Publication Date: 2020-12-18CHINA UNIV OF PETROLEUM (EAST CHINA)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA UNIV OF PETROLEUM (EAST CHINA)
Publication Date
2020-12-18

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Abstract

The invention discloses a heat-fluid-solid coupling numerical simulation method a high-temperature fracture-cavity type reservoir. The method comprises the following steps: acquiring geometric information of fractures and karst caves of the high-temperature fracture-cavity type reservoir, and generating a discrete fracture-cavity model meeting fractal and power law distribution; and establishing aheat-fluid-solid coupling mathematical model and a numerical calculation method of the high-temperature fracture-cavity type reservoir, and performing heat-fluid-solid coupling numerical simulation on the discrete fracture-cavity model meeting fractal power law distribution. According to the method provided by the invention, the energy mass transmission rule of the high-temperature fracture-cavity type reservoir under the heat-fluid-solid coupling effect of comprehensively considering the geometric attributes of the discrete fracture-cavity network and seepage free flow coupling, the local non-thermal equilibrium effect, fracture nonlinear shear-expansion deformation and the like can be well simulated. The method is suitable for practical application, the development dynamic of the high-temperature fracture-cavity type reservoir is predicted, and main factors influencing the development dynamic of the high-temperature fracture-cavity type reservoir are determined.
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Description

technical field

[0001] The invention relates to the field of numerical simulation of geothermal fields, in particular to a numerical simulation method for heat-fluid-solid coupling of high-temperature fracture-cavity reservoirs. Background technique

[0002] For the potential energy crisis and environmental problems, the use of huge resources, sustainable, environmentally friendly renewable energy geothermal resources will be a solution to replace fossil energy. The high-temperature fractured-vuggy carbonate reservoir is composed of bedrock system, fracture system and cave system, which is a kind of geothermal resources. Due to the tectonic movement and the dissolution of paleokarst, well-developed fractures (distributed in a disconnected or connected form) and caves (isolated or connected with fractures, ranging in diameter from centimeters to meters), have obvious multi-scale.

[0003] The heat transfer process of fracture-cavity reservoirs is mainly controlled by fluid f...

Claims

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