This editor’s note highlights the key facts and market implications behind “New Method for Measuring Slate Permeability Aids”, with emphasis on sourcing, product fit, fabrication, logistics, or buyer impact.
A team from National Central University (NCU) has proposed a new method for evaluating slate permeability and depth, helping to clarify the most critical and difficult-to-obtain underground fluid conductivity parameters in the early stages of geothermal development. This opens a new direction for Taiwan's geothermal resource assessment and power plant feasibility analysis. In a press release issued on November 10, NCU noted that Taiwan is located at the junction of the Eurasian and Philippine Sea plates. Rapid orogenic movements have caused deep, hot slate to be quickly uplifted to shallower depths, giving it geothermal development potential. However, slate is a metamorphic rock formed by temperature and pressure, with low porosity. Fluid flow is controlled by fractures, making permeability difficult to measure directly—a bottleneck in assessing geothermal development potential.
To address this issue, Professor Jia-Jun Dong's team from the NCU Institute of Applied Geology studied slate samples from the Hongye Formation in Taitung. Using a high-pressure permeability measurement instrument donated by a professor from Kyoto University during the Chelungpu Fault project and installed at NCU, the team successfully measured the conductivity parameters of slate. They established a "permeability-depth model under dual contributions of rock mass and fractures."
Unlike traditional potential assessment methods that only identify "thermal treasures" deep underground but cannot quantify heat exchange and power generation based on "channel width" and "flow rate," the NCU research team can accurately measure underground fracture widths and convert them into overall slate permeability. This ensures that green energy developers can evaluate power generation efficiency in advance and reduce development risks.
Professor Dong stated that this research provides a simplified assessment process applicable during the preliminary geothermal investigation phase. It allows for rapid estimation of the fluid conductivity of target formations before drilling or in-situ monitoring, helping the government and industry prioritize geothermal potential areas and assess economic feasibility.
