Experimental Technique for Modeling Multi-Field Coupled Transport in Multi-Fracture Geothermal Reservoirs

Peng Xiao (), Xiaonan Li, Yu Li, Bin Chen, Yudong Tang, Xiufeng Ge, Yan Qin, Hong Tian and Jun Zheng
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Peng Xiao: School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China
Xiaonan Li: No. 1 Oil Producing Plant of Qinghai Oil Field, China National Petroleum Corporation, Dunhuang 736202, China
Yu Li: No. 1 Oil Producing Plant of Qinghai Oil Field, China National Petroleum Corporation, Dunhuang 736202, China
Bin Chen: No. 1 Oil Producing Plant of Qinghai Oil Field, China National Petroleum Corporation, Dunhuang 736202, China
Yudong Tang: No. 1 Oil Producing Plant of Qinghai Oil Field, China National Petroleum Corporation, Dunhuang 736202, China
Xiufeng Ge: No. 1 Oil Producing Plant of Qinghai Oil Field, China National Petroleum Corporation, Dunhuang 736202, China
Yan Qin: Technology Innovation Center for Risk Prevention and Control of Major Project Geosafety, Ministry of Natural Resources, Beijing 10083, China
Hong Tian: School of Engineering, China University of Geosciences, Wuhan 430074, China
Jun Zheng: School of Engineering, China University of Geosciences, Wuhan 430074, China

Energies, 2025, vol. 18, issue 13, 1-14

Abstract: In the operation of enhanced geothermal systems (EGSs), complex physical and chemical coupling processes, which are crucial for the efficient exploitation of geothermal energy, are involved. In situ studies of multi-fracture hot dry rocks (HDRs) face significant challenges, leading to a shortage of experimental data for verifying numerical simulations and supporting experimental techniques. In this paper, a multi-field coupling experimental simulation technique was designed for a multi-fracture geothermal reservoir. This technique enables the experimental investigation of the effects of fracture and reservoir characteristics, working fluid parameters, and wellbore arrangement on the multi-field coupling transport mechanism inside geothermal reservoirs during EGS operation. In addition, the practicability and reliability of the experimental technique were proved via a two-dimensional multi-fracture model. The experimental technique addresses a research gap in studying multi-fracture geothermal reservoirs and holds potential to promote substantial progress in geothermal resource exploitation.

Keywords: experimental technique; multi-fracture model; multi-field coupling; geothermal reservoir; enhanced geothermal systems (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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