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Special Event Log

Party :Monarch Seq#: 139
Survey: 9269 Dir: 287
Client :ExxonMobil FSP :3498
Line : G03A2000B139 LSP :1868
Comments
  • GENERAL SURVEY PARAMETERS: Gippsland Basin
  • RECORDING SYSTEM : MSX / CRS
  • STREAMERS : 7 X 5000 METERS
  • STREAMER SEPARATION: 100 METERS
  • TOTAL CHANNELS : 2800
  • RECORDING FILTERS
  • LOW CUT : 2 Hz/12 dB per oct.
  • HIGH CUT : 206 Hz/264 dB per oct.
  • STREAMER DEPTH : 9 METERS
  • RECORD LENGTH : 6.5 SECONDS
  • SHOT POINT INTERVAL: 18.75 METERS
  • GROUP INTERVAL : 12.5 METERS
  • SOURCE DEPTH : 8 METERS (DI s ARE 1 METER ABOVE THE GUN)
  • SOURCE VOLUME : 3000 CUBIC INCHES X 2
  • SOURCE SEPARATION : 50 METERS
  • CENTER OF SOURCE TO CABLE REFERENCE POINT: 126 METERS
  • CENTER OF SOURCE TO CABLE LAST GROUP : 5102 METERS
  • ---------------------------------------------------------------
  • BOL WEATHER: NW @ 15 Knots SEAS: 1.5 m. PITCH: 75%
  • EOL WEATHER: NW @ 18 Knots SEAS: 1.5 m. PITCH: 70%
  • DUMMY FILES : 1, 1672
  • BOL NOISE FILE: 2 = 2 Hz.
  • 3 = 8 Hz.
  • EOL NOISE FILE: 1673 = 2 Hz.
  • 1674 = 8 Hz.
  • SPECIAL EVENTS: * Cable #1 not used d/t intermittent bird line dropout. *
  • Intermitent sea noise visible throughout line on approx. 3%-5% of traces affecting all traces.
  • Depth control poor SP 1940-EOL due to heavy tail current
  • Edit SP 2800-2450 due to ship noise.
  • EXTERNAL NOISE FROM:
  • AHEAD : Ship noise visible SP 2800-2755, approx 5uB RMS.
  • ASTERN: Ship noise now visible astern > 20 uBars on SPs 2665-2615
  • Ship noise cont.now at approx. 15-20 uBars on SPs 2615-2590
  • Ship noise decreasing to approx.10-15 Ubars on SPs 2590-2555
  • Ship noise now at approx. 5-10 uBars on SPs 2555-2505
  • Ship noise decreasing to < 5 uBars at SP 2505-2445
  • ABEAM : Ship noise visible on SPs 2755-2685 at approx. 15-20 uBars
  • Ship noise increasing > 20 uBars on SPs 2685-2665
  • BAD BIRD DIs
  • C(1): NIL
  • C(2): 1 dead
  • C(3): NIL
  • C(4): NIL
  • C(5): NIL
  • C(6): NIL
  • C(7): 1 dead
  • BAD GUN DIs
  • GS(1): NIL
  • GS(2): NIL
  • GS(3): NIL
  • GS(4): NIL
  • GS(5): NIL
  • GS(6): NIL
  • GS(7): NIL
  • GS(8): NIL
  • BAD GUN PIs
  • GS(1): NIL
  • GS(2): NIL
  • GS(3): NIL
  • GS(4): NIL
  • GS(5): NIL
  • GS(6): NIL
  • GS(7): NIL
  • GS(8): NIL
  • BOL NOISE: EOL NOISE:
  • C(1): 4.6 C(1): 5.0
  • C(2): 3.9 C(2): 4.4
  • C(3): 4.1 C(3): 4.5
  • C(4): 3.0 C(4): 3.9
  • C(5): 2.9 C(5): 4.0
  • C(6): 2.9 C(6): 4.5
  • C(7): 3.4 C(7): 4.7
  • ---------------------------NAVIGATION ------------------------
  • 3590 NAVIGATION TAPE NUMBER: G03A-P294-T10
  • P2 FILE USED: G03A2000B139.0.p294
  • NAVIGATION COMMENTS:
  • Dead at SOL
  • Float GPS: T7R01,T2R01
  • Acoustics: S3T01, S7T07
  • V1T01 Ranges poor/unuseable
  • Compasses: S2C1, S7C1
  • NAVIGATION ONLINE COMMENTS:
  • Rapid current changes causing some steering difficulties
  • 2760 manually reset crab angle on bride
  • 2600 wide separation tail 4-5
  • ---------------NAVIGATION PROCESSING----------------
  • FSP: 3498
  • LSP: 1868
  • FEATHER ANGLES
  • MIN: -18.3
  • MAX: 7.8
  • PRIMARY NAVIGATION: Multifix 2 (vesref 3)
  • GYRO USED IN PROCESSING: spectra gyro 2
  • ACOUSTICS NOT USED: 51101, 52301, 52707
  • FANBEAM NOT USED:
  • GPS TARGETS NOT USED: 64201, 64701
  • COMPASSES NOT USED: 1201, 1701
  • SPECIAL COMMENTS:
  • Cable 1 deleted in Unavchk d/t bird line leakage. Unavchk cable 1 - 6 are
  • actual cables 2 - 7.
  • Poor acoustic ranges for Cable 4 front network.
  • *********************LINE ACCEPTANCE***************************
  • *****(SIGNING IS ACCEPTANCE OF THE LINE)*****
  • NAVIGATION PROCESSING:_________________________________________________
  • QUALITY CONTROL_____________________________________________
  • SEISMIC PROCESSING__________________________________________
  • COORDINATOR_________________________________________________
  • CLIENT REP.__________________________________________________
  • Return to Line List