Low temperature geothermal energy production technique method

Abstract

The invention discloses a low temperature geothermal energy production technique method, and belongs to a geothermal energy utilization technique. According to the method, fracturing and communication are performed in a heat storage stratum section through drilling, fracturing and directional drilling techniques on the premise that geological environment stability is ensured according to a geothermic gradient theory, so that subsections of a heat storage stratum are communicated in a certain depth underground, a relatively independent fluid circulation space system is formed, and the purpose of low temperature geothermal energy production is achieved in an extraction and filling combined linkage manner. The method and techniques are scientific and reasonable, the production and utilization problems of low-temperature geothermal energy in a vast underground water area are solved, the technical target that hot springs exist anywhere is achieved, geothermal energy resources are sufficiently utilized, and the geological environment is not damaged.

Description

technical field [0001] The invention belongs to geothermal energy utilization technology, and mainly relates to a low-temperature geothermal exploitation technology method. Background technique [0002] According to data from the Ministry of Land and Resources, the geothermal energy stored within 2,000 meters from the surface of the country's major sedimentary basins is equivalent to the heat of 250 billion tons of standard coal. There are 103 geothermal fields nationwide that have been formally surveyed and approved by the land department, and the submitted recoverable geothermal resources are 332.83 million cubic meters per year; 214 geothermal fields have been preliminarily evaluated. According to the current level of development and utilization, the total amount of geothermal water that can be developed and utilized in the country is about 6.845 billion cubic meters per year, which is equivalent to the calorific value of 32.848 million tons of standard coal per year. Ho...

AI Technical Summary

Problems solved by technology

According to the said heat storage layer is only 2000-5000 cubic meters, the water storage capacity is only 500-750 cubic meters, if calculated according to the permeability of 200-500 mD, the daily mining volume is less than 100 cubic meters, and the utilization efficiency of geothermal energy is low

This patent focuses on the geothermal power generation process. Although it mentions the use of fracturing technology and directional drilling technology to increase heat recovery, it does not propose specific plans and construction techniques

Images