An Integrated Method 3D Velocity Model and Fuzzy Clustering for Fracture Characterization

Southeast Asian Conference on Geophysics

Ibrahim Fattah, Erlangga^1 ; Dian Nugraha, Andri^2 ; Sule, Rachmat^3

Graduate Program of Geophysical Engineering, Faculty of Mining and Petroleum Engineering, Institut Teknologi Bandung, Ganesha 10, Bandung

40132, Indonesia^1

Global Geophysics Research Group, Faculty of Mining and Petroleum Engineering, Institut Teknologi Bandung, Ganesha 10, Bandung

40132, Indonesia^2

Applied Geophysical Research Group, Faculty of Mining and Petroleum Engineering, Institut Teknologi Bandung, Ganesha 10, Bandung

40132, Indonesia^3

关键词: Enhanced geothermal systems;    Fracture characteristics;    Fracture characterization;    Geothermal reservoir;    Geothermal systems;    High permeability;    Integrated method;    Tomographic inversion;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/62/1/012026/pdf
DOI  :  10.1088/1755-1315/62/1/012026

来源: IOP

【 摘 要 】

Enhanced Geothermal system assessment conducted to have a better understanding of characteristics of fracture caused by a fluid injection in the geothermal reservoir. Fluid injection may cause microseismic occur. These events allow us to map and characterize fractures in the geothermal system. Fractures play important role at the geothermal system due to its ability to increase permeability for fluid movement within the reservoir. In this study, we combined tomographic inversion method and fuzzy clustering to identify fracture characteristics at the EIF Geothermal Field. Tomography helped in delineating fluid-filled fractures with high permeability area which shown by lower velocity Vs anomaly than Vp and higher Vp/Vs ratio. Fuzzy clustering allowed us to map microseismic movement and estimate suitable locations for the future well injections or productions.