1. Project Introduction The fracturing-assisted conventional geothermal energy development system, as shown in Figure 1, consists of a heat extraction system made up of pumping wells and reinjection wells. This method consumes almost no geothermal water. The geothermal water is heated through a heat exchanger and then discharged to the outside without entering the pipelines of heating or power generation systems. Artificial fracturing is carried out between the pumping and reinjection wells to create fractures, enhancing the reinjection of geothermal water and thereby reducing waste of geothermal resources and environmental damage. By selecting reasonable distances between the pumping and injection wells and controlling the reinjection temperature appropriately, there will be no issue with the decrease in geothermal water temperature. The closed-loop heat extraction technology based on horizontal branch wells, as shown in Figure 2, utilizes multi-branch horizontal well technology to drill multiple horizontal branch wells above the main wellbore. The heat transfer fluid enters from the main wellbore and then expands into each branch horizontal wellbore. As the fluid flows through the horizontal branch wells, it absorbs heat, and then returns to the surface through an insulated inner pipe. Subsequently, it enters the heat exchanger where it is heated by convection to warm the ground circulation fluid. Eventually, the heat-carrying fluid, having released its heat, enters the main wellbore under the action of a circulating pump, forming a closed circulation system. 2. Technological Innovation and Leadership: For fracturing-assisted conventional geothermal energy development systems, artificial fracturing is performed between the injection wells and production wells to create fractures, allowing geothermal water to form a closed circulation loop. This system only extracts heat and does not consume the geothermal water, thus it does not cause thermal pollution or ground subsidence to the surrounding environment. On the other hand, it can also ensure the service life of the thermal reservoir. For multi-branch horizontal heat exchanger enhanced geothermal systems, which are part of the closed-loop system underground, they only extract the heat from the thermal reservoir during heat exchange with it, without any material exchange with the reservoir layer, making them environmentally friendly systems. The use of multi-branch horizontal wells to construct a heat exchanger system, It greatly increases the heat exchange area between the fluid and the thermal storage, improves the heat transfer power, and reduces drilling costs. In a closed-loop system, clean water is used as the heat carrier, which makes the system run stably and extends the lifespan of ground equipment. 3. Economic and Market Prospects Whether for heating or power generation, compared to conventional coal-fired or fuel oil boilers, the initial investment of geothermal utilization systems is either equivalent or relatively higher. However, once constructed and operational, geothermal systems do not consume fuels such as coal or oil, and the operating costs are only 1/4 to 1/3 of those of conventional heating or power generation systems. Therefore, geothermal utilization systems have better economic benefits. In recent years, with the increasing demands for environmental protection and low-carbon economy, geothermal energy, as a clean and renewable resource, has received more and more attention. China has a rich reserve of geothermal resources, and the prospects for the development and utilization of these resources are broad. The development goal for geothermal energy during the "Twelfth Five-Year Plan" period is to reach a total of 15 million tons of standard coal in various types of geothermal energy development and utilization by 2015. In the coming years, the prospect for the use of geothermal energy is broad. 4. Main Application Fields Enhanced geothermal energy development technology is mainly used for geothermal heating and belongs to environmentally friendly geothermal energy extraction technology.