中深层地热能取热技术研究进展

 总结了国内外关键取热技术研究现状,包括对井循环取热技术、单井闭式循环取热技术、重力热管循环取热技术、单井开式循环取热技术、U型井闭式循环取热技术和多分支径向井循环取热技术,分析了关键取热技术的特点、适用条件和未来攻关方向,阐述了不同取热技术的发展阶段和应用场景,提出了面向中深层地热能高效开采的发展建议。

Research progress on heat extraction technology for developing medium-deep geothermal energy

The medium-deep geothermal energy in China is abundant, with a great potential for development and utilization. To accelerate the exploitation of the medium-deep geothermal energy is important for promoting the rapid development of China's clean heating industry, with a diversified energy supply system and with the goals of the"carbon peaking and carbon neutrality" in the future. In the context of the efficient exploitation of the medium and deep geothermal energy, this paper reviews the researches of the heat extraction technology for exploiting the medium-deep geothermal energy, including various heat extraction technologies based on the doublet-well circulation, the closed-loop circulation in a single well, the circulation in a gravity heat pipe, the open-loop circulation in a single well, the circulation in a U-shaped well and the circulation in a multilateral radial well. The characteristics, the application conditions and the future researches of key heat extraction technologies are analyzed, as well as the development stage and the application scenarios of different heat extraction technologies. The suggestions for efficient exploitation of the medium-deep geothermal energy are proposed.