Member of I A P C O
Seismic attenuation is a key challenge to exploration and production for a number of reasons: it can severely impact the quality and frequency content of data beneath high-attenuation zones such as gas chimneys or near-surface heterogeneous carbonates; as such it can severely affect lateral distribution of seismic amplitudes and cause errors in quantitative interpretation. Conversely, attenuation can be an opportunity with significant potential as attribute for subsurface characterisation. Over the years, significant advances have been made in theoretical modelling and laboratory measurements of attenuation and dispersion. Seismic acquisition technology (broadband and multi-component seismic) and processing workflows have recently delivered major breakthrough and significant progress has also been achieved in estimation of attenuation from borehole, cross-hole and surface seismic data. However there has been little integration between these two streams of research. This has impeded the development of quantitative models that could relate attenuation observed in field data to rock properties.
The workshop aims to bridge this gap by bring together for the first time experts in theoretical and experimental rock physics, wave propagation and scattering theory, seismic processing and imaging, and quantitative interpretation. Moreover, the workshop will provide the ideal forum, where experts from oil companies, service companies and academia will interact and debate on technical issues and emerging technologies, addressing challenges and opportunities in seismic imaging and subsurface characterisation.
This workshop will cover four key topic areas through technical presentations and case studies. The main topics under discussion are:
- Mechanisms and models of anelastic absorption and scattering attenuation
- Laboratory measurements
- Estimation from field data (sonic logs; borehole and cross-hole seismic; surface seismic)
- Applications (Q compensation; direct hydrocarbon indicators, overpressure prediction) & Case Studies