Abstract Hot dry rock (HDR) is an important geothermal resource and the primary direction of future development. Granite particularly rich in radiogenic heat-generating elements (e.g., U, Th, K) thus main target for HDR development worldwide. Southeastern China contains most abundant granite distribution country accounts more than 40% total area. This paper analyzes heat production, flux, crustal thermal structure, reservoir temperature key exploration areas based on a systematic...

As tunnel engineering advances towards greater depths, larger scales, and longer distances, high rock temperatures thermal damage frequently occur, constituting some of the main geological hazards faced by transportation, water conservancy, other projects. In this study, we take alternative option to No.1 deep-buried diversion “Diversion Yellow River Jining” project as study area, combined with data field investigation, comprehensively consider thermodynamic properties rocks along logging...

The thermophysical properties of rocks are identified as basic physical parameters for the exploitation and utilization hot dry rock (HDR) geothermal resources. Given that reservoirs in a HDR system subjected to certain temperature pressure, investigating impacts pressure on holds great significance. This study investigated granite samples from Tengchong area, Yunnan Province, China. Using laboratory tests combined with simulations, this explored temperature, combination both thermal...

There are abundant geothermal resources in the Xiong’an New Area, China. However, thermal state and energy accumulation mechanism not clear. Based on geological conditions characteristics of present field, a 2D model was established to analyze process mantle-derived heat conduction predict distribution deep field. We calculated terrestrial flow for Rongcheng uplift Niutuozhen be 64 75 mW/m 2 , respectively. The this area controlled by four-element comprising conduction, structural uplift,...

Abstract Southeastern China (SE China) is located in the Pacific tectonic domain and has experienced a series of tectonomagmatic events induced by subduction Paleo‐Pacific Plate since late Mesozoic. The formed NE‐NNE oriented faults under NW–SE regional stress field, along which number thermal springs occur. Previous studies have focused on genesis mechanism specific geothermal fields SE China, but general characteristics hydrothermal systems remains unclear. In this study, we investigate...

The Xiong’an new area in northern China is rich geothermal resources. Gaoyuzhuang Formation the Proterozoic Jixian system an important recently discovered reservoir. reservoir has been affected by multiple stages of tectonic movement. fractures are very well developed, resulting strong heterogeneity reservoir’s porosity and permeability. Few studies have conducted on In this study, interpretation data from image logs was used to summarize characteristics fractures, including fractures’...

Earthquakes induced during hot dry rock (HDR) geothermal development have attracted extensive attention and constrained the further exploitation of HDR resources. Seismic risk evaluation projects is essential. The first demonstration project in China located Gonghe Basin Qinghai. EGS (enhanced systems) site near County very seismically sensitive. seismic by hydraulic fracturing long-term cycling process was evaluated using a multi-field coupling method based on analysis geological...

Fractures play a pivotal role in carbonate thermal storage systems, serving as primary hydraulic conductivity channels that significantly influence breakthrough times and heat extraction efficiency geothermal-to-well systems. Their impact is critical for well placement system life prediction. This paper focuses on within the reservoir of Wumishan formation Rongcheng geothermal field, Xiong'an new area. It employs combination field tests numerical simulations to determine permeability...

The Zhangzhou Basin (ZB) is one of the most important hydrothermal regions in southeast coast China, with abundant underground thermal water resources. region located within widely scattered acid igneous rocks. Because low permeability granitoids, geothermal flow strongly controlled by fault structures. Previous studies mainly focused on center ZB and provided little understanding geochemistry controlling mechanism peripheral areas basin. In this study, chemical compounds elements both cold...

Currently, water fracturing under deep geothermal conditions remains poorly understood because the reservoir rocks are usually high-strength crystalline characterized by high temperatures. The aim of this study is to investigate effects rock properties, injection rates, and temperatures on hydraulic behavior induced crack characteristics through experimental investigations. A series experiments was conducted two Indosinian granite types differences in caused properties. Among others, six...

In the study, we analyzed hot dry rock geothermal field of Guide Basin in Qinghai Province, China. We used T2Well software—a coupled wellbore–reservoir simulator—to build a “wellbore–reservoir” model with “three-spot” well pattern (one injection and two production wells). simulated several fixed flow rate cases which water or CO 2 is injected. The objectives our present work are (1) to investigate fluid thermal processes circulating at bottoms, wellbores, wellheads; (2) identify changing...

Abstract Subducted remnant slabs play an important role in the geodynamics and evolution of Earth, but their behaviour mantle is not well understood. Terrestrial heat flow thermal lithosphere structure provide crucial constraints on lithospheric dynamics. Based whole‐well steady‐state temperature logs conductivity measurements core samples from a scientific borehole, we obtained new high‐quality terrestrial values for East Asia. The was calculated at 60.6 ± 16.0 mW/m 2 with high crust/mantle...

The study of geothermal field characteristics and the mechanisms involved in hydrogeochemical evolution fluids is an effective means to understand formation, reservoir conditions circulation mechanics resources. Documenting these parameters within Rongcheng Bulge Xiong’an New Area, China, great significance its future development utilization as a resource. In this paper, we investigate hydrochemical rock thermal properties Reservoir surrounding rocks identify fluid genesis field. results...

After a comprehensive analysis for the influential factors like anti-erodibility chemical constitutes, mineral components and micro-structure characteristics of Pisha-sandstone, by combining AHP grey correlation analysis, quantitative comparison 5 types Pisha-sandstones in Ordos is made on basis multi-layer assessment mode. The result shows that, from point view, order those is: Pink sandstone, celadon purple sandstone commixed sandstone. For evaluation process adopts simple method, direct,...

Fault has an important influence on the storage and movement of geothermal water. The Zhangzhou Basin is wholly located in a granodiorite rock mass. Due to low permeability granodiorite, faulted structure evident control action hydrothermal activity fields. Hot springs crack along Pingtan-Dongshan northeastern direction emerge Fu’an-Nanjing Fault. Through measurement temperature several hot Basin, we found northwestern Zhangzhou-Tianbao high gap between two sides Yangxi-Yuanshan huge;...

There are abundant geothermal resources in the Xiong’an New Area, China. Drilling has revealed a greater potential deep Gaoyuzhuang reservoir. However, reservoir required acidification to increase its water production. In this study, three types of core samples with different mineral compositions from depths target boreholes were selected for acid rock reaction experiments at temperature 40 °C, 60 80 °C and 100 pressure 30 MPa. The kinetics major minerals modeled based on transitional state...

Dezhou City is located in northwestern Shandong Province, China, and rich geothermal resources. Approximately 30% of the wells heating areas Province are Dezhou. A doublet-well layout system was completed by Lubei Geo-engineering Exploration Institute for local winter heating, which has been operation 4 years. The wellbores penetrated Guantao Formation with a well spacing 180 m. This study aims to assess heat extraction performance current predict temperature evolution lifespan. Furthermore,...