Cornerstone

Cornerstone in the Central North Sea is now available in depth. The conventional data (N-S) long-offset datasets have been reprocessed with bandwidth enhancement to provide pseudo-broadband data which has been merged with newer BroadSeis datasets. All eight phases of acquisition have been combined to create a contiguous full PSDM volume covering over 35,000km2. This dataset has been rigorously imaged using TomoML velocity modeling with  nine horizons, extensive well control and dip-constrained tomography for the shallow channels, delivering regional coverage with local detail and definition.

Cornerstone TomoML

Highlights

Cornerstone map
  • Over 35,000 km2 of contiguous, fully merged Kirchhoff PSDM data
  • Application of CGG’s new multi-layer tomography technique, TomoML, for better quality and faster velocity model building
  • Rigorous imaging using nine horizons, extensive well control and dip-constrained tomography for the shallow channels
  • Option to add CGG’s proprietary bandwidth extension and ghost compensation algorithm
  • Regional coverage with local detail and definition
  • Merged bandwidth-extended conventional and BroadSeis™ data
  • Dual Azimuth (DAZ) dataset for enhanced illumination, approx. 8,600 km2 over the HPHT area
  • Added value Pore Pressure Prediction (PPP) and Facies Finder products available

Dual Azimuth Area

The East-West Phase 8 BroadSeis data overlies the earlier conventional North-South data over the High Pressure High Temperature (HPHT) area of the Central North Sea. These two datasets were merged to produce a dual-azimuth volume, delivering:

  • Improved resolution and ghost-free broadband data
  • Better illumination of complex structures beneath the Base Cretaceous Unconformity
  • Improved sampling for true 3D processing algorithms to provide better noise and multiple attenuation
  • Optimal imaging from more accurate velocity and anisotropy models

Pore Pressure Prediction

PPP map
Pore Pressure Prediction

Cornerstone PPP provides volumetric pore pressure predictions to identify overpressure anomalies which could indicate potential pay zones or possible drilling hazards. CGG combines expertise across the geosciences to integrate high-resolution seismic and velocity models with petrophysical and well-log pressure data to deliver a range of pore pressure products to address the challenging HPHT North Sea reservoirs.

CGG offers more than 16,000 km2 of integrated PPP data (indicated in blue on map) as part of our Cornerstone data set.

Facies Finder

FaciesFinder Marconi

Facies Finder maximizes the value of seismic data early in the E&P cycle to highlight and de-risk potential prospects. It provides easy-to-interpret attribute volumes for lithology and fluid identification using an elastic inversion. The method requires no well calibration, making it suitable for exploration and screening for AVO anomalies.

All CGG multi-client data worldwide are available for license on a non-exclusive basis. Contact us for availability, quality inspection and pricing.

Explore our interactive map and see details of all CGG's multi-client data in this area.

The right data, in the right place, at the right time

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How broadband can unlock the remaining hydroc...

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