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  • Writer's pictureMatt Swan

A Fictional Island with Real Risks

A Case Study in Windia

Welcome To Windia

Windia is a fictional island with very real problems. These problems can occur in any global location and we see them frequently. Avoid the these pitfalls be ensuring you optimise your Seismic data at every step.

Site A

Site A is at the initial scoping phase where a desk study will typically be carried out utilising publicly available information. Often overlooked is the Oil & Gas seismic data, which for the most part is available through the National Data Repository. The common misconception is that this data lacks the resolution to be useful, but that is only in its present form, having been processed for much deeper targets.

With RockWave's Repurposing workflows, we can greatly enhance the shallow resolution to reveal detailed information within the foundation window that can add significant value to those initial ground models.

Site B

Site B is a little more advanced and has had multi-channel UHR data acquired and processed by the acquisition vendor, with seemingly fit for purpose results. Look closer and it is clear that the mixed phase Sparker wavelet is causing imaging issues throughout the section.

By applying careful wavelet processing and other bandwidth extending techniques, it is clear a more confident ground model can be generated. The interpreted picks now represent the correct time / depth of the geological boundary in the sub-surface which has significant engineering implications - an incorrect pick on bubble energy can equate to a 3m depth difference / 10% of foundation depth.

Site C

Site C are working on their cable route utilising pinger SBP. As is often the case, other than some basic filtering in the field and static corrections, very little processing is applied to the dataset which results in the shallow section being dominated by ringing noise, obscuring the very area that is of interest.

RockWave take SBP processing a step further by applying designature routines to sharpen the wavelet and reveal the shallow surface features just below the seabed, allowing you to trench with more confidence and reduce the risk of encountering the unexpected.

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