Fractured geothermal exploitation process thermal attenuation simulation device

Abstract

The invention provides a thermal attenuation simulation device for a fractured terrestrial heat exploitation process, and mainly relates to the field of scientific research of fractured terrestrial heat. A crack type geothermal exploitation process thermal attenuation simulation device comprises a support and a data collection controller, one side of the support is provided with an inlet constant water head box, the other side of the support is provided with an outlet constant water head box, and a water storage box, a water return box and a thermostat are arranged below the inlet constant water head box. The inlet constant water head box is communicated with the interior of the water storage tank through a water supplementing pipe. The crack type geothermal development process thermal attenuation simulation device has the beneficial effects that the crack type geothermal development process thermal attenuation simulation research work can be carried out by building the crack type geothermal development process thermal attenuation simulation device in a laboratory, the cost is greatly reduced, a multi-working-condition simulation function is achieved, meanwhile, the simulation time period can be controlled, and the simulation efficiency is improved. And aiming at the thermal attenuation process of the fractured geothermal stratum in different development periods, the early-stage simulation research of the fractured geothermal stratum with different exploitation purposes can be met.

Description

technical field [0001] The invention mainly relates to the field of fractured geothermal scientific research, in particular to a thermal decay simulation device of a fractured geothermal mining process. Background technique [0002] In the field of fractured geothermal development, as the heat of the geothermal rock mass is continuously exchanged and extracted by the heat exchange medium, if the heat loss rate of the formation rock mass is greater than the replenishment rate, the formation temperature will continue to drop. It is difficult to maintain effective heat supply, and in this process, the flow of heat exchange medium is the main factor controlling the heat loss rate of geothermal rock mass. In addition, fractured geothermal resources are mostly deep geothermal resources, which have the characteristics of deep burial and high construction costs. On-site drilling to monitor the heat decay in the process of fractured geothermal exploitation will greatly increase the c...

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Problems solved by technology

[0002] In the field of fractured geothermal development, as the heat of the geothermal rock mass is continuously exchanged and extracted by the heat exchange medium, if the heat loss rate of the formation rock mass is greater than the replenishment rate, the formation temperature will show a phenomenon of continuous decline. It is difficult to maintain an effective heat supply, and in this process, the flow rate of the heat exchange medium is the main factor controlling the heat loss rate of the geothermal rock mass. In addition, most of the fractured geothermal resources are deep geothermal resources, which have the characteristics of deep burial and high construction costs. On-site drilling to monitor heat decay during fractured geothermal exploitation will greatly increase construction costs, and most of the previous groundwater seepage and heat transfer model devices are concentrated in the field of shallow geothermal energy development and utilization, and heat transfer samples are usually constructed on the basis of loose soil and sand , the research problems also focus on the heat transfer process of soil and sand layers, and the lack of research devices and methods for heat attenuation in the process of bedrock fissure-type geothermal development greatly limits the development of fracture-type geothermal development and utilization technology

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