Multi-Method Geophysical Mapping of a Geothermal Reservoir and Buried Channel in Langfang, Northern Part of China

ABSTRACT Geothermal resources are a clean and renewable energy source that can play a critical role in drastically reducing air pollution. The utilization of geothermal resources requires technical support to decrease the developing risk by applying an integrated interpretation of geophysical methods. In this study, we used geophysical methods in the Langfang region of China to design a workflow for the safe yield of geothermal resources. To do so, we conducted controlled-source audio-frequency magnetotelluric (CSAMT) soundings, shallow soil temperature surveys, radon gas measurements, and the microtremor survey method (MSM) at the geothermal exploration and development site. These geophysical analyses identified a geothermal reservoir and a buried channel in the region. The dominant fault developing in the area was identified as the best channel for heat and water based on the developed geothermal wells. In areas with relatively little geothermal exploration, this study provides a reference and demonstration for geothermal development.