Cornerstone

CGG is currently reprocessing its Cornerstone surveys in the Central North Sea, using the latest cutting-edge imaging technology to create a contiguous data volume of over 35,000 km². Data will be available in time for the 32nd UK Licensing Round, and impressive high-resolution new images of the Forties channels have already been achieved.

Processing is being tailored to address local geological complexities, with model-building benefitting from Q-Tomo, Q-FWI, and Q-RTM. Final PSDM data sets will include Least Squares Q-Kirchhoff and Wave Equation migrations.

Cornerstone-repro-vpvs cornerstone-repro-amp
Vp/Vs horizon slice through Forties formation showing excellent facies discrimination between channel sands (green) and background mudstone (blue) Far angle stack amplitude extraction through Forties formation showing hydrocarbon accumulations

Cornerstone DAZ mapHighlights

  • Over 35,000 km² of contiguous, fully merged PSDM data
  • Application of CGG’s latest imaging technology, including Q-Tomography, Q-FWI and Q-RTM
  • Final PSDM data sets will include Least Squares Q-Kirchhoff and Wave Equation migrations
  • Rigorous imaging using extensive well control
  • 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

Click here to see examples of the new images available from the reprocessing.

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 the GeoStore and see details of all CGG's multi-client data in this area.

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