Seismic Imaging of Subsurface Fractures for Enhanced Geothermal Energy Extraction

Thesis Abstract

Abstract
This thesis presents a comprehensive study on the application of seismic imaging techniques for characterizing subsurface fractures to enhance geothermal energy extraction. Geothermal energy is a sustainable and renewable resource, but its efficient utilization is hindered by the complex subsurface structures, particularly fractures that can significantly influence fluid flow and heat transfer. Seismic imaging is a powerful geophysical tool that can provide valuable insights into subsurface fracture networks, enabling better reservoir characterization and management for geothermal energy production. The research begins with an introduction that highlights the importance of geothermal energy as a clean energy source and the challenges associated with subsurface fractures. The background of the study discusses the existing literature on seismic imaging and its applications in geothermal reservoir characterization. The problem statement emphasizes the need for improved fracture characterization techniques to optimize geothermal energy extraction. The objectives of the study are to develop a methodology for seismic imaging of subsurface fractures, analyze the obtained seismic data to identify fracture patterns, and assess the impact of fractures on geothermal reservoir performance. The limitations of the study are acknowledged, including data acquisition constraints and the inherent uncertainties associated with fracture characterization. The scope of the study includes field data collection using seismic reflection and/or tomography methods, data processing and analysis to delineate fracture networks, and numerical modeling to simulate fluid flow and heat transfer in fractured reservoirs. The significance of the study lies in its potential to enhance the understanding of subsurface fractures in geothermal reservoirs and improve reservoir management strategies for sustainable energy production. The structure of the thesis outlines the organization of the research, including the chapters on literature review, research methodology, discussion of findings, and conclusion. The definitions of key terms used throughout the thesis are provided to ensure clarity and understanding of the technical terminology. The literature review chapter critically examines previous studies on seismic imaging of fractures in geothermal reservoirs, highlighting the methodologies, challenges, and advancements in the field. The research methodology chapter details the data acquisition, processing, and interpretation steps involved in the seismic imaging of subsurface fractures, along with the numerical modeling techniques used to analyze reservoir performance. The discussion of findings chapter presents the results of the seismic imaging analysis, including the identification and characterization of fracture networks, their spatial distribution, and their impact on geothermal reservoir behavior. The implications of the findings for geothermal energy extraction are discussed, emphasizing the importance of accurate fracture characterization for reservoir optimization. In conclusion, this thesis contributes to the advancement of geothermal energy research by demonstrating the effectiveness of seismic imaging for characterizing subsurface fractures and improving reservoir performance. The study provides valuable insights into the complex interplay between fractures and geothermal reservoirs, offering practical recommendations for enhancing geothermal energy extraction efficiency and sustainability. Keywords Seismic Imaging, Subsurface Fractures, Geothermal Energy, Reservoir Characterization, Fluid Flow, Heat Transfer.