Simulation experiment device used for enhanced geothermal system and method for evaluating porous sandstone geothermal reservoir reconstruction by means of simulation experiment device
A simulation experiment device, enhanced technology, applied in geothermal energy prediction/simulation, heating device, heat collector using groundwater as working fluid, etc.
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Embodiment approach 1
[0047] figure 1 It is a structural schematic diagram of a simulation experiment device for an enhanced geothermal system in a preferred embodiment of the application; please refer to figure 1 , the simulation experiment device 100 includes a heat exchange chamber 1, a prefabricated rock block 2, an electric heating plate 3, a constant temperature liquid supply tank 4, two liquid collection tanks 5, a high-pressure plunger pump 6 and a horizontal ground stress simulation device 7.
[0048] The heat exchange chamber 1 is used to provide a closed working space for the simulation experiment device 100. Specifically, the heat exchange chamber 1 forms a closed chamber; The inlet is provided corresponding to the outlet, both the inlet and the outlet are in communication with the chamber, and the number of the outlets is two.
[0049] The prefabricated rock block 2 is placed in the chamber, and an injection wellbore 21, a first production wellbore 22 and a second production wellbore ...
Embodiment 1
[0079] This example studies the influence of well spacing on the development effect of thermal storage when the development mode of porous sandstone thermal storage is a horizontal well with one injection and two productions, and the thermal storage transformation method is horizontal well staged fracturing (two fractures). The development effect includes the spatial distribution of temperature and pressure in rock blocks during development, the spatial distribution of temperature and pressure in fractures, heat extraction efficiency, and the temperature recovery of rock blocks and fractures after a period of heat storage development.
[0080] S1. Prefabricate the wellbore in the rock block according to the well type in the porous sandstone heat storage. The wellbore is made of iron pipe and hard plastic pipe; the iron pipe is 45cm long and the inner diameter is 2cm. The length of the pipe is 40cm, and the outer diameter is 2cm. A large area of holes is dug on the hard plasti...
Embodiment 2
[0088] In this example, the development mode of porous sandstone thermal storage is a horizontal well with one injection and two production, and the thermal storage reconstruction method of horizontal well staged fracturing is used. The development effect includes the spatial distribution of temperature and pressure in rock blocks during development, the spatial distribution of temperature and pressure in fractures, heat extraction efficiency, and the temperature recovery of rock blocks and fractures after a period of heat storage development.
[0089] S1. Prefabricate the wellbore in the rock block according to the well type in the porous sandstone heat storage. The wellbore is made of iron pipe and hard plastic pipe; the iron pipe is 45cm long and the inner diameter is 2cm. The length of the pipe part is 60cm, and the outer diameter is 2cm. A large area of holes is dug on the hard plastic pipe wall to simulate the completion of the open hole. The hard plastic pipe is insert...
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