Enhancement of Passive Microseismic Events Using Seismic Interferometry

Three-dimensional supervirtual seismic refraction interferometry

“…For instance, Akram and Eaton (2014) proposed an algorithm based on repetitive crosscorrelation to improve arrival time picking. Seismic interferometry has been used for enhancing the signal-to-noise ratio of seismic data (Al-Shuhail et al, 2013) . The concept is to merge waveform, recorded at different receivers to generate the wave that would travel between these receivers if one of these receivers was a source.…”

“…The concept is to merge waveform, recorded at different receivers to generate the wave that would travel between these receivers if one of these receivers was a source. This eliminates the need to have a source located at each re- This thesis focuses on the use of seismic interferometry algorithm proposed adapted from Al-Shuhail et al (2013) and Al-Shuhail (2015) to enhance first arrivals on active 3D seismic data. Applying the conventional 2D SVI on 3D seismic refraction data suffers a setback because the 2D SVI assumed a stationary position for source-receiver pairs which is not applicable in 3D case.…”

“…This will enable the first arrival picking to be carried out automatically at better confidence level without necessarily discarding most challenging seismic data. Several studies (Alshuhail et al, 2012;Al-Shuhail et al, 2013;AlShuhail, 2015) tackled this problem, however, these studies cannot be applied directly to active 3D seismic data. Al-Shuhail et al (2013) and Al-Shuhail (2015) developed algorithms which were used successfully to enhance the first arrival of microseismic data and improve automatic picking of first arrivals of 2D seismic data, respectively.…”

“…Several studies (Alshuhail et al, 2012;Al-Shuhail et al, 2013;AlShuhail, 2015) tackled this problem, however, these studies cannot be applied directly to active 3D seismic data. Al-Shuhail et al (2013) and Al-Shuhail (2015) developed algorithms which were used successfully to enhance the first arrival of microseismic data and improve automatic picking of first arrivals of 2D seismic data, respectively. The 2D SVI methods has the limitation of ray-path problem when applied directly on 3 3D case (Lu et al, 2014).…”

An iterative, fast-sweeping-based eikonal solver for 3D tilted anisotropic media

“…For high-end near-surface modeling, microseismic-source localization, and fractured-reservoir characterization, it is important to compute first-arrival traveltimes in the presence of anisotropy (Baofu et al, 2008;Taillandier et al, 2009;Al-Shuhail et al, 2013). First-arrival traveltimes satisfy the eikonal equation, which is obtained from the high-frequency asymptotic approximation of the wave equation.…”