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Hydraulic fracturing simulation experimental device and method of hot dry rock enhanced type geothermal system

A simulated experimental device and hydraulic fracturing technology, which is applied in the direction of earthwork drilling, mining fluid, measurement, etc., can solve immature problems and achieve the effects of easy observation, good pressure resistance and sealing, and convenient disassembly

Inactive Publication Date: 2018-04-10
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned hydraulic fracturing physical experiment equipment mainly meets the high-pressure test environment, and the high-temperature and high-pressure experimental equipment and experimental research methods for the physical simulation of hot dry rock hydraulic fracturing are still immature. The experimental setup is of great significance

Method used

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  • Hydraulic fracturing simulation experimental device and method of hot dry rock enhanced type geothermal system
  • Hydraulic fracturing simulation experimental device and method of hot dry rock enhanced type geothermal system
  • Hydraulic fracturing simulation experimental device and method of hot dry rock enhanced type geothermal system

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Embodiment 1

[0036]Embodiment 1, with reference to attached figure 1 with 4 , the present invention mentions a hydraulic fracturing simulation experiment device for a hot dry rock enhanced geothermal system, the technical solution of which is: including a pressure control system 1, a high-pressure fracturing pump 2, a fracturing fluid injection chamber 3, and a proppant injection chamber 4. Mixing device 5, sample hydraulic fracturing chamber 6, multi-stage piston 7, hydraulic fracturing chamber insulation layer 8, hydraulic fracturing chamber heating layer 9, high temperature and high pressure perforated plate 12, hydraulic servo control system 17, high pressure pipeline 18 , flow monitoring meter 19, thermal fluid storage equipment 23, the pressure control system 1 is connected to the high-pressure fracturing pump 2, and one end of the fracturing fluid injection chamber 3 and the proppant injection chamber 4 is connected to the high-pressure fracturing pump 2, The other end is connected...

Embodiment 2

[0059] Embodiment 2, the difference between the present invention and Embodiment 1 is that magnetized water is used as the fracturing fluid to increase the boiling point of the fracturing fluid. In addition, the heating layer is heated by an electric heating device with a wire wound coil, and the upper limit of the maximum heating temperature is 250°C.

[0060] The simulated rock test piece adopts hot dry rock samples, which can be different types of large-scale rocks (0.3m×0.3m×0.3m), such as granite, carbonate, sandstone, etc., and can also be artificially passed through other materials such as cement or gypsum. Mixed composition, its core rock mechanical properties (such as compressive strength, compressive strength, Young's modulus, Poisson's ratio) and oil layer physical parameters (such as porosity, permeability, etc.) should meet the basic requirements of the experiment, manual sample preparation Constant temperature and humidity maintenance is required.

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Abstract

The invention relates to a hydraulic fracturing simulation experimental device and method of a hot dry rock enhanced type geothermal system. A hot dry rock high-pressure and high-temperature generating environment is simulated, precise stress is applied to a rock core by designing a multistage piston, the permeability of hot dry rock fluid is maintained by adopting a pressureproof and temperature-resistant perforated plate, the hot dry rock fluid is externally connected to a fluid collection chamber through a flow guiding groove, and meanwhile an adjustable sound emission probe is embedded into a true-triaxial high-pressure axe to monitor a sound emission event happening when a fracture expands in the hydraulic fracturing process, integrated collection of information of rock hydraulic fracturing, sound emission, heat energy recovery efficiency and the like under the triaxial confining pressure condition can be achieved by utilizing the device, and therefore the fracture initiation andexpanding situations of the hot dry rock hydraulic fracture can be studied. The hydraulic fracturing simulation experimental device and method have the beneficial effects that warming and heat preservation effects are good, a sealed part is simple to replace and convenient to maintain, a sound emission embedded part can be adjusted according to the requirements for the probe sizes, in addition, the whole device further has the characteristics that operation is convenient, and the protection and maintenance period is short, and the device is an important technological innovation at the aspect of dry hot rock enhanced type geothermal system hydraulic fracturing testing device detection.

Description

technical field [0001] The invention relates to a geothermal fracturing simulation experiment device, in particular to a hydraulic fracturing simulation experiment device and method for a hot dry rock enhanced geothermal system. Background technique [0002] Geothermal resources are a new type of clean renewable energy, and it is one of the green new energy sources that can effectively solve traditional fossil fuels, energy shortages and air pollution. Worldwide, the development and utilization of geothermal resources are increasingly concerned. At present, Iceland, the United States, Indonesia, the Philippines, Japan and other countries have already carried out the effective use of geothermal energy in power generation, optimizing the country's energy structure. Among them, geothermal resources can be divided into hydrothermal type and dry hot rock type according to their output conditions. Hydrothermal geothermal resources are usually located in shallow layers, and the te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/26E21B49/00E21B47/00E21B47/06
CPCE21B43/26E21B47/00E21B47/06E21B49/00
Inventor 时贤程远方蒋恕王鹏
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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