Western Logo]

Special Event Log

Party :Monarch Seq#: 144
Survey: 9269 Dir: 286.9
Client :ExxonMobil FSP :2831
Line : G03A1904B144 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: WSW @ 20 Knots SEAS: 1.5 m. PITCH: 77%
  • EOL WEATHER: WSW @ 25 Knots SEAS: 1.5 m. PITCH: 65%
  • DUMMY FILES :
  • BOL NOISE FILE: 1 = 2 Hz.
  • 2 = 8 Hz.
  • EOL NOISE FILE: 1001, 1002 = 2 Hz.
  • 1003 = 8 Hz.
  • SPECIAL EVENTS:
  • Line shot as multiple segments
  • SP 2782-2507 inclusive and 2449-2420 inclusive NDR / NTBP
  • SP 2485-2505 turn noise visible on front end of Cables d/t changes in offsets for coverage.
  • Missed SP 2131,2127,2125,2011 d/t boat speed.
  • Depth control on cable 1 birds 9-13, cable 2 birds 18-19, cable 6 bird 10 and cable 7 birds 5-8 erratic from SP 1990 due to heavy tail current (1knot)
  • SP 1920-EOL cable 7 birds 4-10 deep due to tail current / vane wash. 12.5m
  • EXTERNAL NOISE FROM:
  • AHEAD : NIL
  • ASTERN: NIL
  • ABEAM : NIL
  • 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): 4.5 C(1): 10.1 *
  • C(2): 4.5 C(2): 3.8
  • C(3): 3.9 C(3): 3.6
  • C(4): 3.9 C(4): 3.3
  • C(5): 3.5 C(5): 3.2
  • C(6): 3.9 C(6): 3.4
  • C(7): 5.2 C(7): 4.2
  • * EOL value for C1 affected by channel 18 spikes. Approx EOL value 4uB
  • ---------------------------NAVIGATION ------------------------
  • 3590 NAVIGATION TAPE NUMBER: G03A-P294-T10
  • P2 FILE USED: G03A1904B144.0.p294
  • NAVIGATION COMMENTS:
  • Dead at SOL
  • Float GPS: T7R01
  • Acoustics: S3T01, S7T07
  • Compasses: S2C1, S7C1
  • NAVIGATION ONLINE COMMENTS:
  • FOSP 2831
  • FPSP 2821
  • LPSP 2793
  • LOSP 2783
  • FOSP 2506
  • FRSP 2496
  • LPSP 2460
  • LOSP 2450
  • Missed some firsts oversteering to kill feather for far offsets
  • FOSP 2419
  • FRSP 2409
  • LRSP 2401
  • LOSP 2391
  • FSP INFILL 2390 - EOL.
  • ---------------NAVIGATION PROCESSING----------------
  • FSP: 2831
  • LSP: 1868
  • FEATHER ANGLES
  • MIN: -6.3
  • MAX: 8.3
  • PRIMARY NAVIGATION: Multifix 2 (vesref 3)
  • GYRO USED IN PROCESSING: spectra gyro 2
  • ACOUSTICS NOT USED: 52301, 52707
  • FANBEAM NOT USED:
  • GPS TARGETS NOT USED: 54201, 64701
  • COMPASSES NOT USED: 1201, 1514, 1610, 1701
  • SPECIAL COMMENTS:
  • High compass bias in mid net d/t crossline movement.
  • High Variance d/t crossline movement.
  • Seis gap sp 2782 - 2507
  • Seis gap sp 2449 - 2420
  • *********************LINE ACCEPTANCE***************************
  • *****(SIGNING IS ACCEPTANCE OF THE LINE)*****
  • NAVIGATION PROCESSING:_________________________________________________
  • QUALITY CONTROL_____________________________________________
  • SEISMIC PROCESSING__________________________________________
  • COORDINATOR_________________________________________________
  • CLIENT REP.__________________________________________________
  • Return to Line List