Page 178 - Acquisition and Processing of Marine Seismic Data

2.6 QC IN DATA ACQUISITION 169

TABLE 2.23 Example HSE Events for the Whole TABLE 2.24 Example Statistical Information List on
Survey Injuries for Whole Survey

HSE Event Count HSE Event Count
Port calls 2 Fatality 0
Safety drills 6 Restricted work case 0
Fire drills 4 Lost time case 1
Man overboard drills 2 Medical treatment 0
Oil spill drills 2 First aid treatment 2
Abandon ship drills 3 Not work-related injuries 0
Blackout vessel drills 0 Not work-related illnesses 0
Emergency steering 0 Onboard hazard observations 0
Emergency towing 0 Improvement suggestions 6
Safety/HSE meetings 13 Environmental hazard observations 0
Safety audit 14 Near-miss reports 16
Cross inspections 12 Material loss 6
Toolbox meetings 186 Marine mammal observations 8
Vessel induction 8
Crew change 5
Workboat operations 9 Final products are prepared and delivered
Bunkering 4 after the survey, and are completed with a
signed protocol for the following data transfer:
Helicopter landing 1
• Raw seismic field tapes in SegD format
First aid case 2
• Seismic field tapes with the navigation loaded
Injures 4
into the headers in SegY format
Exposure hours (vessel crew) 11,474 • All observer logs and the other records in
digital and paper copy
Exposure hours (seismic crew) 12,350
• Raw navigation files in UKOOA P2/94
Exposure hours (third party crew) 3,614
format
• Processed navigation files in UKOOA P1/90
format
items are delivered as the acquisition proceeds.
These typically include • Processed gravity and magnetic data
• Onboard processing tapes (velocity
• Daily reports fields, stack and migrated data) in SegY
• Weekly reports format
• Monthly reports • A final survey report that includes a detailed
• Daily instrument test results description of seismic data acquisition, QC
• QC reports per-line applications and analyses, HSE events and
• Observer logs statistics.