Recent advancements in geothermal energy research have illuminated the potential of deep carbonate thermal reservoirs, particularly in China’s Xiong’an New Area. A groundbreaking study led by Feng Ma from the Institute of Hydrogeology and Environmental Geology at the Chinese Academy of Geological Sciences reveals innovative techniques that could revolutionize the commercial viability of these geothermal resources.
Geothermal energy is increasingly recognized as a clean and renewable resource, yet its exploitation has been limited, especially in deep carbonate reservoirs known for their low permeability and heterogeneity. The study addresses these challenges head-on, employing a novel combination of hydraulic jetting and acid fracturing. This innovative approach allows for targeted fracturing and enhanced fluid flow within the reservoir, significantly increasing the efficiency of geothermal extraction.
“We have developed a stimulation technology that not only enhances the productivity of geothermal wells but also ensures effective sealing and strong penetration,” said Ma. “The results from our pilot tests demonstrate the substantial potential of these deep carbonate reservoirs, which have been largely untapped due to previous technical limitations.”
The research highlights the successful stimulation of geothermal well D22, where water inflow surged from 4.72 cubic meters per hour to an impressive 44.10 cubic meters per hour following treatment—an increase of 8.3 times. Additionally, the unit water inflow experienced a remarkable 30-fold increase, showcasing the significant impact of the new stimulation techniques.
The implications for the energy sector are profound. With the ability to enhance the development potential of deep geothermal resources, this research not only paves the way for more sustainable energy solutions but also positions China as a leader in geothermal technology. As the world grapples with the challenges of climate change and energy demands, harnessing geothermal energy could provide a reliable and environmentally friendly alternative.
Feng Ma’s work serves as a catalyst for future developments in geothermal energy, potentially encouraging further investment and exploration in deep carbonate reservoirs. As these technologies become more refined and widely adopted, the commercial landscape of geothermal energy could see a transformative shift, making it a more attractive option for energy companies and investors alike.
This pivotal research was published in ‘工程科学学报’, translated as the Journal of Engineering Science, and is a testament to the ongoing commitment to advancing geothermal technology in China. For more information about the research and the Institute, you can visit lead_author_affiliation.
