Geothermal Power Generation Potential in the Eastern Linqing Depression

Abstract

China has been the leading country worldwide in direct geothermal utilization for a rather long time, which has contributed significantly to reducing carbon emissions. But the installed capacity of geothermal power generation in China is very small, and there are only a few geothermal power plants in China, specifically in Tibet, including the well‐known Yangbajing geothermal power plant. Therefore, it is anticipated that more high‐temperature geothermal resources will be discovered in order to promote China's power generation. There is potential for high‐enthalpy geothermal in the Eastern Linqing Depression in Shandong Province, where geothermal energy is stored in Ordovician and Cambrian carbonate strata. Based on the geothermal gradient in Cenozoic strata and the depth of the target geothermal reservoir, the temperature distribution pattern of the reservoir was analyzed, and two “sweet points” were identified in the Yucheng geothermal field and the Guanxian geothermal field, where the reservoir temperature is predicted to be higher than 200°C at a depth of less than 8000 m. Due to the low karst fissure ratio and the insufficient geothermal fluid in the geothermal reservoir, it is recommended that an enhanced geothermal system be set up, to increase the permeability of the natural fracture system in the carbonate formations and provide sufficient fluid for power generation through reinjection of used geothermal fluid. The power generation capacity of the two geothermal fields was estimated using a volumetric method, revealing a power generation capacity of 1621.02 MWe for the Yucheng geothermal field, and 1287.19 MWe for the Guanxian geothermal field.

Evaluation of Hydrocarbon Geochemical Anomalies in the Dailekh Region of Nepal

“…Several gas seedling sites have been discovered in Dailekh region of Nepal, showing certain potential for hydrocarbon exploration. Nepal has developed the Lakharpata, Gondwana, Surkhet and Siwalik Groups in order from old to new, and different types and maturity of hydrocarbon source rocks are developed in these formations [7,8]. However, scholars from different countries have not yet reached a definite conclusion on the genesis of these oil and gas seedlings through their studies, lacking carbon isotope tests and necessary analysis of influencing factors on the crude oil and hydrocarbon source rock systems.…”