Stratum deep high-salinity brine exploitation and heat utilization system

Abstract

The invention provides a stratum deep high-salinity brine exploitation and heat utilization system which comprises an injection well, an extraction well, a CO2 source gathering device, a heat utilization device, a separation device and a recharging device. A closed loop is formed between the CO2 source gathering device, the heat utilization device, the separation device as well as the recharging device and the injection well as well as the extraction well, the bottom of each of the injection well and the extraction well is positioned in a high-salinity brine layer, the CO2 source gathering device is communicated with a wellhead of the injection well, high-salinity brine is extracted out from a wellhead of the extraction well, the wellhead of the extraction well is communicated with the heat utilization device which is communicated with the separation device, and the recharging device is connected with both the separation device and the injection well. By the system, the problems of serious pressure accumulation and salt rock sedimentation can be effectively relieved, and geological storage of CO2 can be realized to slow down weather change; constant pressure of geothermal reservoirs can be maintained, exploitation efficiency of brine and geothermal resources can be greatly improved, geothermal energy can be used for power generation or can be directly utilized, and economic benefit is remarkable.

Description

Technical field [0001] The invention relates to a system for preparing high-salt brine in deep stratum, in particular to a system for heat exchange with high-salt brine, and at the same time CO 2 It is sealed underground and belongs to the field of environmental management and resource mining technology. Background technique [0002] Geothermal energy is a kind of renewable clean energy from the deep part of the earth, which is brought to the surface for use in the form of hot water or steam through the flow of groundwater or other working fluids. In today's rapid economic development and increasingly scarce energy, the rational development and utilization of geothermal resources has become more and more popular. There are mainly geothermal power generation, while the direct use of geothermal water for building heating, the development of greenhouse agriculture and hot spring tourism have also developed rapidly. [0003] As a kind of geothermal energy, hot brine is geothermal wate...

AI Technical Summary

Problems solved by technology

However, the use of water as a heat transfer medium has some disadvantages: 1. The water injected into the ground is seriously lost, resulting in waste of clean water, and the project cost will be increased due to water loss

2. The water injected into the ground will dilute the brine, which is not conducive to the development and utilization of brine

3. The compressibility of water is small, so it needs to use larger pumping equipment to provide energy to maintain the circulation of fluid

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