Compressive Seismic Imaging (CSI)

QLD ASEG Branch February Technical Talk with drinks Sponsored by SAExploration

Technical Talk by Keith Mills, Lead Geophysicist at SAExploration

The Shannon-Nyquist Sampling Theorem has long governed seismic theory and formed the basis for proper seismic design. It states that a continuous function can be completely described by a series of discrete samples, provided the sample rate is at least two times the maximum frequency present within the signal. Compressive Sensing (CS) – a technique used in medical imaging and digital cameras – has shown that perfect reconstruction is still possible when the sample-rate criteria is not satisfied.

Compressive Seismic Imaging (CSI) is the application of CS theory to seismic. Through proper spatial sampling, known as Non-Uniform Optimal Sampling (NUOS), CSI has shown distinct advantages to seismic imaging, including drastic increases in fold, trace density and bandwidth; proper noise attenuation of previously challenging surface wave modes; improved imaging both generally and in areas with substantial infrastructure; footprint attenuation; among others. As the evolution of seismic imaging continues, we will highlight the impact of CSI, blended acquisition, and broad bandwidth, with examples from various case studies.

The Talk is free for ASEG members. Please register through Eventbrite.