8th August 2017
All's well that ends well...
As part of Shearwater's 2017 Technical Seminar program, I presented an update on our Depth Imaging capabilities at the Stavanger and London dates, of which a portion of the talk covered the recent upgrade of our processing platform, OpenCPS, to handle the inclusion of well data, and all that this entails. Following this, my fellow Shearwater colleagues recently had the pleasure of my extolling the virtues of well data further as the latest of the in-house 'Lunch and Learn' seminars was held in July.
As a seasoned Depth Imager I am fully indoctrinated about the benefits of including well data within model-building. The myriad of well data types, including sonics, checkshots, deviations, formation tops, VSPs, composite logs and dipmeter logs can be used to constrain the velocity and anisotropy models and help tie the seismic- derived velocity to the Earth with the objective of creating a true representation of the sub-surface.
Wells can be used to tie seismic velocities to well velocities, used to calibrate depth models, can be used to help understand the relationship between velocity and anisotropy, can be used to obtain a better starting model to help reduce the turnaround of model-building, and for the generation of synthetics to help constrain key processing stages such as residual zero-phasing or in the selection of a suitable demultiple sequence.
Shearwater has been incorporating well data into its processing projects for some time, but the recent OpenCPS upgrade includes a dedicated internal well format (.well) allowing us to load the well data upfront and carry the wells throughout both Time and Depth-domain processing stages. This has streamlined the loading process as well as opening doors to allow us to access the well data in other key algorithms where well constraint is important. We hope to be able to reveal more possibilities for us to use wells in our processing technology in coming months.
Rich Bartlett, Depth Imaging Manager