Investigation of seismic wave attenuation in fractured rock formations using laboratory and field measurements.

Thesis Abstract

Abstract
Seismic wave attenuation in fractured rock formations plays a crucial role in various geophysical applications, including hydrocarbon exploration, geotechnical engineering, and seismic hazard assessment. Understanding the mechanisms governing seismic wave attenuation in fractured rocks is essential for accurately interpreting seismic data and predicting subsurface properties. This study focuses on investigating seismic wave attenuation in fractured rock formations through a combination of laboratory experiments and field measurements. The research begins with a comprehensive review of the literature on seismic wave attenuation, emphasizing the influence of fractures on wave propagation characteristics. Various factors affecting seismic attenuation in fractured rocks, such as fracture density, orientation, and fluid content, are discussed to provide a theoretical background for the study. The methodology section details the experimental setup for laboratory measurements and the field data collection techniques employed in this research. Laboratory experiments involve the characterization of fractured rock samples using ultrasonic testing to quantify seismic wave attenuation properties under controlled conditions. Field measurements include seismic surveys conducted in fractured rock formations to validate laboratory findings and investigate attenuation behavior in real-world scenarios. The findings of this study reveal significant insights into the relationship between seismic wave attenuation and fracture characteristics. Laboratory results demonstrate that seismic attenuation is strongly influenced by fracture density and orientation, with higher attenuation observed in highly fractured samples. Field measurements confirm the laboratory findings and provide valuable data on attenuation patterns in natural fractured rock formations. The discussion section analyzes the implications of the study results for geophysical exploration and subsurface imaging. The influence of fractures on seismic wave attenuation is discussed in the context of reservoir characterization, seismic monitoring, and earthquake hazard assessment. Practical implications for mitigating seismic risks in fractured rock environments are also addressed. In conclusion, this thesis presents a comprehensive investigation of seismic wave attenuation in fractured rock formations using a combination of laboratory and field measurements. The findings contribute to the understanding of seismic attenuation mechanisms in fractured rocks and have practical implications for various geophysical applications. Future research directions are suggested to further enhance the knowledge and application of seismic wave attenuation in fractured rock formations. Keywords seismic wave attenuation, fractured rock formations, laboratory experiments, field measurements, geophysical applications.