Special Event Log
Party :Monarch
Seq#: 136
Survey: 9269
Dir: 286.9
Client :ExxonMobil
FSP :3886
Line : G03A1808A136
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: SW @ 10 Knots SEAS: 1.5 m. PITCH: 75%
EOL WEATHER: SW @ 10 Knots SEAS: 1.5 m. PITCH: 65%
DUMMY FILES : 1
BOL NOISE FILE: 2 = 2 Hz.
3 = 8 Hz.
EOL NOISE FILE: 2038 = 2 Hz.
2039 = 8 Hz.
SPECIAL EVENTS:
Constant Bird line leakage affecting cable 1 birds 1-21, cable not used in coverage.
Intermittant Bird line leakage affecting cable 4 birds 2-10.
SP 2150 to 2100 bend noise at head of cables.
EXTERNAL NOISE FROM:
AHEAD : NIL
ASTERN:
Ship noise @ 3000ms moveout, < 5uB RMS. SP 2930-2840
ABEAM : SP 1940 to EOL ship noise < 5 uB.
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): 4.9 C(1): 4.9
C(2): 4.6 C(2): 4.8
C(3): 4.4 C(3): 4.8
C(4): 3.9 C(4): 4.6
C(5): 3.9 C(5): 4.8
C(6): 4.1 C(6): 5.0
C(7): 5.1 C(7): 6.0
---------------------------NAVIGATION ------------------------
3590 NAVIGATION TAPE NUMBER: G03A-P294-T10
P2 FILE USED: G03A1808A136.0.p294
NAVIGATION COMMENTS:
Dead at SOL
Float GPS: T7R01
Acoustics: S3T01, S7T07
V1T01 Ranges poor/unuseable
Compasses: S2C1, S7C1
NAVIGATION ONLINE COMMENTS:
Streamer #1 has bird line leakage causing poor acoustic and compass data, not used online.
Bird line leakage causing poor acoustic and compass data also affecting front streamer 4.
Current change at SP 2210, moving port to compensate for coverage
---------------NAVIGATION PROCESSING----------------
FSP: 3886
LSP: 1868
FEATHER ANGLES
MIN: -9.8
MAX: 3.7
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: 64701
COMPASSES NOT USED: 1201, 1701
SPECIAL COMMENTS:
CABLE 1 DELETED IN UNAVCHK D/T CABLE LEAKAGE . CABLES ARE NAMED 1 - 6 IN
UNAVCHK WHICH ARE CABLES 2 - 7.
Poor acoustic ranges for cable 4 front network.
AVEL card used in processing with a value of 1523.0 m/s
*********************LINE ACCEPTANCE***************************
*****(SIGNING IS ACCEPTANCE OF THE LINE)*****
NAVIGATION PROCESSING:_________________________________________________
QUALITY CONTROL_____________________________________________
SEISMIC PROCESSING__________________________________________
COORDINATOR_________________________________________________
CLIENT REP.__________________________________________________
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