SEAL Pirambu | PGS

Sergipe Alagoas Basin - Brazil - 2018

SEAL Pirambu 3D GeoStreamer

Deepwater extension for plays defined by Barra and Farfan discoveries
Website Map for Survey SEAL Pirambu
The Farfan/Barra/Moita Bonita discoveries are in the Upper Cretaceous. Attributes using Geostreamer data in the SEAL 4-10-11 survey demonstrate the potential for prospects in deep water Sergipe Basin. Mapping of the proposed source interval shows mature source for the area.
The reservoir intervals for the discoveries and fields updip and along strike to SEAL Pirambu are the first productive intervals in the basin. Base of slope and basin floor fans potentially extend into deeper water. Exploration for these intervals is expected to continue into the future.
3D GeoStreamer NAZ acquisition with Kirchhoff PSTM and TTI PSDM to delineate Cretaceous source and Late K to Tertiary reservoirs. Seamless merge with SEAL 4-10-11 (Bonita) 3D GeoStreamer Reprocessing.

Specifications

Survey summary

  • Type: 3D
  • GeoStreamer
  • Geometry: Standard
  • Size: 8425 sq.km
  • Acquisition year: 2018
  • Completion of processing: 2019
  • Water depth: 500-3000 m
  • Shooting direction: 119/299
  • Vessel: Ramform Tethys

Acquisition parameters

  • Number of streamers: 16
  • Streamer length: 8100 m
  • Streamer separation: 100 m
  • Shot interval: 25 m
  • Record length: 10000 ms
  • Sample rate: 2 ms
  • Bin dimensions (Acquisition): 6.25x25 m
  • Bin dimensions (Processing): 12.5x12.5 m
  • Fold: 80

Processing

  • P-UP generation
  • Full source deghosting
  • 3D surface related multiple elimination (SRME)
  • Convolutional 3D SRME
  • Wave equation 3D SRME
  • High resolution radon demultiple
  • HyperTomo velocity model building
  • Full waveform inversion (FWI)
  • Kirchhoff prestack time migration (PSTM)
  • Kirchhoff prestack depth migration (PSDM)
  • Q-migration

Depth products

  • Final Kirchhoff PSDM stack
  • PSDM angle stack near
  • PSDM angle stack mid
  • PSDM angle stack far
  • PSDM angle stack u-far
  • PSDM gathers
  • Anisotropy and velocity models
  • Final Kirchhoff PSDM angle stacks

Time products

  • Final Kirchhoff PSTM Stack
  • Angle stack near
  • Angle stack mid
  • Angle stack far
  • PSTM gathers
  • Stacking velocity
  • Migration velocity

Additional products

  • Gravity
  • Magnetics