ACQUISITION REPORT

Locked date: 23-Apr-2007 17:22:52


Sequence: 0094, Line name: GAP07B1360J094, Seismic datatype(s): AF


<maintitle>ACQUISITION REPORT </maintitle>
Survey
ClientApache
Client Reference Id 
Areaelver
VesselWestern Trident
Job Number9606
Survey Type3D Marine Streamer

Sequence
Line NameGAP07B1360J094
Preplot Line Name1360
Direction197.0°
Chargeable Line Length20531.25m
SOL Time (utc)19:41:05 22-Apr-2007
EOL Time (utc)22:00:05 22-Apr-2007

Attributes
Wind Speed / Direction35.0 / S[knots]
Swell Height / Direction5.0 / S[meters]
Propeller Speed [avg rpm]
Propeller Pitch [avg %]

  SOL EOL 
Bottom Speed5.04.7[knots]
Water Depth619.0230.0[meters]
Feather Angle4.70.2[deg]
Sources Volume s1,s2 ..3147, 31473147, 3147[cu inch]
Background Noise17.070.0[µBar avg rms]
Lowcut Filter Cutoff/Slope2 / 122 / 12[Hz] / [dB/oct]


Production
 
  Shotpoint File Time [utc]
SOL Noise Record(s)   
SOL Dummy Record(s)2122 - 2093 2122 - 2093 19:37:19 - 19:40:59 
FSP Start of Line2092 2092 19:41:05 22-Apr-2007 
MSP(midnight sp)   
LSP End of Line998 998 22:00:05 22-Apr-2007
EOL Dummy Record(s)997 - 988 997 - 988 22:00:14 - 22:01:24 
EOL Noise Record(s)   

Line-segments 
SPs Files Times [utc] Type No. CMPs Status Remark
2092-09982092 - 99819:41:06 - 22:00:06Infill16ValidProduction Shots

Positioning remark 
P190 made for SP 2090-998.
Very noisy compasses and GPS d/t marginal weather

Acquisition remark 
Cable depths unstable and continuous break out present 20-30% of traces at 30-40uB.
SP 1265 to 1256 low gun pressure d/t compressor failure. Guns disabled.


Tape-List
 
Stream AF 
Reel Shots Files No. shots Deck Missing Shots Remark
14542122 -  12732122 -  12738501  
14551272 -  11631272 -  11631102 Copy of copy tape
14561162 -  9881162 -  9881753  

Stream AF_copy 
Reel Shots Files No. shots Deck Missing Shots Remark
54542122 -  12732122 -  12738504  
54551272 -  9881272 -  9882855  
54560 -  00 -  006 No data on tape


Annotations
 
NTBP 
Shot(s) File(s) Streamer No(s) Trace(s) Type Seismic datatype Remark
17401740ALLALLIncomplete external headerAFBlock TRIGUN missing
1265-12561265-1256ALLALLGun pressureAFDrop in gun pressure d/t compressor failure
ALLALL1106-107Noisy Trace(s)AFNoisy trace(s)
ALLALL4222-223Noisy Trace(s)AFNoisy trace(s)
ALLALL8212-213Noisy Trace(s)AFNoisy trace(s)
ALLALL8141, 220, 258Spiking AF TracesAFSpiking AF trace(s)
ALLALL5105-106Noisy Trace(s)AFNoisy trace(s)
ALLALL749Noisy Trace(s)AFNoisy trace(s)
ALLALL874Noisy Trace(s)AFNoisy trace(s)
ALLALL698Spiking AF TracesAFSpiking AF trace(s)
ALLALL6159Dead trace(s)AFAF traces dead
ALLALL2161Noisy Trace(s)AFNoisy trace(s)
ALLALL4190Dead trace(s)AFAF traces dead
ALLALL4230Noisy Trace(s)AFNoisy trace(s)
ALLALL8271Noisy Trace(s)AFNoisy trace(s)

Warnings 
Shot(s) File(s) Streamer No(s) Trace(s) Type Seismic datatype Remark
19431943ALLALLIncomplete external headerAFBlock TRIGUN missing
17971797ALLALLIncomplete external headerAFBlock TRIGUN missing
16571657ALLALLIncomplete external headerAFBlock TRIGUN missing
12411241ALLALLIncomplete external headerAFBlock TRIGUN missing
12191219ALLALLIncomplete external headerAFBlock TRIGUN missing
11501150ALLALLIncomplete external headerAFBlock TRIGUN missing
11131113ALLALLIncomplete external headerAFBlock TRIGUN missing
10131013ALLALLIncomplete external headerAFBlock TRIGUN missing
ALLALL8292, 319Weak Trace(s)AFTrace amplitude visibly lower than adjacent traces
ALLALL513, 36, 52Weak Trace(s)AFTrace amplitude visibly lower than adjacent traces
ALLALL279Weak Trace(s)AFTrace amplitude visibly lower than adjacent traces
ALLALL7194Weak Trace(s)AFTrace amplitude visibly lower than adjacent traces
ALLALL6289Weak Trace(s)AFTrace amplitude visibly lower than adjacent traces

Comments 
Shot(s) File(s) Streamer No(s) Trace(s) Type Seismic datatype Remark
21192119ALLALLNoise RecordAFSOL Noise Record
20922092ALLALLBOLAFFirst production SP
998998ALLALLEOLAFLast production SP
990990ALLALLNoise RecordAFEOL Noise Record



List of used abbreviations
SOL/EOLStart/End of line.
FSP/LSPFirst/Last shotpoint of the line.
FCSP/LCSPFirst/Last chargeable shotpoint
MSPMidnight (last) shotpoint of the day
FGSP/LGSPFirst/Last Good Shotpoint
FOSP/LOSPFirst/Last Overlap Shotpoint
FSP/LSP R/OFirst/Last Shotpoint Runout
DEC_FILT/SS_FILTFiltered Decimated Single Sensor/Filtered Single Sensor. ALL in the context of Seismic Datatype means both DEC_FILT and SS_FILT
AFArray Formed
DegDegrees: e[0,360]
revRevolutions
utcUniversal Time Coordinate
SPsShotpoints
CMPsCommon midpoints
NTBPNot to be processed
SISeismic interference
No.Number / Number Of

TIM - ACQUISITION REPORT - Sequence: 0094, Line name: GAP07B1360J094, Seismic datatype(s): AF - Locked date: 23-Apr-2007 17:22:52
GENERATED Monday, April 23, 2007 5:23:24 PM GMT+00:00