The pattern of exploitation and utilization of geothermal energy in China is gradually becoming clear

The draft of China's 13th Five-Year Plan for Geothermal Industry Development proposes five major projects, including comprehensive utilization of geothermal resources in the coordinated development of the Beijing-Tianjin-Hebei region, medium and deep geothermal heating in the Central Plains and Heilongjiang, shallow geothermal energy utilization in the Yangtze River Economic Belt, geothermal power generation in Tibet, and the construction of dry-hot rock power generation demonstration bases. It is not difficult to see that geothermal will soon become an important member of the new energy system and resource poverty alleviation.

It is understood that during the "13th Five-Year Plan" period, the China Geological Survey will focus on geothermal exploration in the southwest, especially in the western Sichuan and southern Tibet regions, the Songliao Plain, the North China Plain and other areas, reduce the exploration risk of commercial funds entering the development of geothermal resources, and promote the large-scale utilization of geothermal resources. In the western region, some technical research and development work such as dry hot rock development test, master construction and cycle test is carried out, hoping to achieve dry hot rock power generation at the end of the "13th Five-Year Plan", "14th Five-Year Plan" and "15th Five-Year Plan" can reach the international leading technical level.

Wang Guiling believes that at present, we should standardize the shallow low-temperature energy utilization market, vigorously promote the utilization of shallow geothermal energy in buildings, heating and cooling, actively promote the utilization of shallow geothermal energy and technical models, and summarize the utilization types and models of different types of areas. At the same time, he said that it should be used scientifically, strengthen recharge, and maintain the sustainable use of geothermal resources and hydrothermal geothermal resources.

Recharge technology in basin area is the main bottleneck problem in geothermal resource development. In recent years, the national geothermal energy development and utilization research and application technology promotion center, Sinopec Xinxing Company, has carried out research on recharge technology, and has achieved 100% recharge of limestone thermal reservoir, and achieved phased results in sandstone formation recharge, and strives to break the bottleneck of large-scale development of sandstone thermal storage through research, and open up a new "blue ocean" of geothermal development. It is reported that at present, Shandong Shanghe, Leling test well recharge rate of more than 80%, has achieved industrialization promotion; The recharge system of Wenlin No. 2 well has obtained the technical patent of "sandstone geothermal tailwater economic recharge system" issued by the State Patent Office, and the natural recharge volume has been maintained at more than 100 cubic meters/hour for two consecutive heating seasons, and the maximum instantaneous recharge volume has reached 148 cubic meters/hour, and the recharge rate has reached 100%.