spec

1. LABRADOR SEA 2D
PSTM Processing
MULTI-CLIENT 2D SURVEY; 26,676 km
ACQUISITION PARAMETERS
Acquisition Date: July 2011 – August 2012
September 2014 – October 2014
Vessel: Sanco Spirit (2011-2012)
Atlantic Explorer (2014)
Shooting Orientation: Strike and dip to the coastline
Recording Instrument: Geostreamer 24 bit (GAS)
Airgun Source: 4135 cubic inches (2011)
4808 cubic inches (2012)
4880 cubic inches (2014)
Gun Depth: 9 meters
Shotpoint Interval: 25 meters
Group Interval: 12.5 meters
Recording Channels: 648 per streamer
Streamer Depth: 20 meters
Streamer Length: 8100 meters
Record Length: 10 seconds
Sample Interval: 2 milliseconds
Nominal Fold: 162
TIME PROCESSING SEQUENCE
Data processing performed by: PGS; Houston, TX USA
 SEG-D field data input
 Merge navigation information into trace headers
 Trace Editing
 Swell Noise Attenuation and Despike
 Linear Noise Attenuation
 Wavefield Separation & Extrapolation (Summation)
 SEGY output P-UP dataset (streamer redatumed to 9 m)
TGS-Imaging; Houston, TX USA
 Input SEG-Y
 Designature Debubble and Zero phase
 Resample from 2ms to 4ms
 Shot Domain Noise Attenuation
 Tau-P Mute and Decon (as needed)
 2D SRME
 Velocity analysis
 Residual Noise Attenuation
 Velocity analysis-
Curved ray Kirchhoff pre stack time migration
 Residual Multiple Noise Attenuation
 Kirchhoff Curved ray pre stack time migration
 Radon
 Inverse NMO; automatic velocity analysis
 Amplitude recovery
 Mute and stack
 Post migration conditioning: F-X deconvolution,
band-pass filter, scaling, stretched to depth
 Output SEGY
AVAILABLE TIME DELIVERABLES
 Field data with navigation in the trace headers / shot ordered (648 traces/shot)
 Radon de-multiple CDP gathers (162 fold)
 Pre-stack time migrated CDP gathers without NMO (12.5m, 81 fold)
 Pre-stack time migrated CDP gathers with NMO (12.5m, 81 fold)
 Raw migration
 Processed migration
 Processed migration stretched to depth
 Angle stacks
 Migration velocities (ASCII)
 Migration velocity trace volume – RMS
 Stacking velocities (SEGY & ASCII)
 Processed source-receiver navigation (UKOOA)
 Post stack navigation (UKOOA)
 Ship-borne gravity data
14 August 2014

2. Canada
45°W
Greenland
50°W
50°W
55°W
55°W
60°W
60°W
60°N
60°N
55°N
55°N
50°N
50°N
LABRADOR SEA 2D
MULTI-CLIENT 2D SEISMIC SURVEY
0 25 50 100 150 200
Kilometers
N:PublicGISArc Map DocumentsCanadaSpecSheetMapsLabrador Sea 2D Spec (port).mxd August 14, 2014
Proposed 2014 Lines: 4,509.36 km
2011-2012 Acquisition: 22,167.225 km