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Illumination Compensation with Seismic-While-Drilling Plus Surface Seismic Imaging
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 80th EAGE Conference and Exhibition 2018, Jun 2018, Volume 2018, p.1 - 5
Abstract
The drill-bit generates significant elastic wave energy whose ray paths are unique relative to those induced by standard surface seismic. Provided that we understand the challenges associated with characterizing the source radiation properties of the drill bit- rock interaction, the data arising from seismic-while-drilling (SWD) are complementary to surface data, and have the potential to enhance geophysical evaluation of the subsurface. Hence, it brings an opportunity to address seismic illumination issue by adding new measurements into the imaging problem. In this paper, we carry out a feasibility study of the SWD method to mitigate the illumination problem in imaging. Source signature estimation of the drill bit- rock interaction is a necessary step for pre-stack migration of the SWD dataset. To do so, we applied a multichannel sparse blind deconvolution technique to estimate the signature and later, we feed the signature into the SWD imaging workflow. Finally, we merge the SWD image with the surface seismic migrated section to improve the illumination of the subsurface features. The efficiency of the workflow is tested against Sigsbee2a model.