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April 14, 2015 - BP Raises the Bar in Geohazard Studies 

geohazardstudies

In the April issue of The Leading Edge, multiple authors from BP examine various seismic approaches to drilling geohazard characterization, ranging from single-line 2D to reprocessing of conventional 3D to, finally, ultra-high resolution 3D using the “P-Cable and similar variants” (Hill et al., Slicing and dicing HR seismic acquisition: Varied approaches to delivery of high-resolution 3D seismic data volumes for drilling-hazard studies – abstract only). P-Cable data from the SAFE-BAND program is featured.

In discussing the displacement of HR2D with the reprocessing of conventional 3D volumes over the last two decades, the authors state that “This approach has been encouraged further by the absence of a cost-effective means for HR3D acquisition. The advent of such approaches as P-Cable (Eriksen et al., 2010) and similar variants offers an attractive alternative to compromising on a non-HR3D image. The P-Cable approach makes use of an array of 20 short streamers to acquire HR3D seismic. Crossline streamer spacing is only 12.5 m, with a total crossline spread width of 250 m.” In commenting on a comparison between P-Cable data and conventional 3D, they say “Although the superior vertical and spatial resolution of the P-Cable data is immediately evident, what is equally important is the increased character of defined seismostratigraphic sequences. This is potentially of great impact in well design and choice of drilling practices.”

Most importantly, they conclude that “in cases in which there is a need for HR data to support drilling-hazard or development studies, there is no reason to not always acquire HR3D data. From 2015, therefore, acquisition of HR2D acquisition will be by exception only.“

We couldn’t agree more.

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