ACQUISITION REPORT

Locked date: 16-Apr-2007 17:14:55


Sequence: 0055, Line name: GAP07B1824P055, Seismic datatype(s): AF


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

Sequence
Line NameGAP07B1824P055
Preplot Line Name1824
Direction197.0°
Chargeable Line Length38831.25m
SOL Time (utc)09:40:07 15-Apr-2007
EOL Time (utc)14:47:48 15-Apr-2007

Attributes
Wind Speed / Direction15.0 / SSE[knots]
Swell Height / Direction1.5 / SSE[meters]
Propeller Speed [avg rpm]
Propeller Pitch [avg %]

  SOL EOL 
Bottom Speed4.914.6[knots]
Water Depth2448.01011.0[meters]
Feather Angle-1.40.9[deg]
Sources Volume s1,s2 ..3147, 31473147, 3147[cu inch]
Background Noise4.610.0[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)6690 - 3206 6690 - 3206 14:51:16 - 09:40:00 
FSP Start of Line3205 3205 09:40:07 15-Apr-2007 
MSP(midnight sp)   
LSP End of Line787 787 14:47:48 15-Apr-2007
EOL Dummy Record(s)786 - 766 786 - 766 14:48:06 - 14:51:09 
EOL Noise Record(s)   

Line-segments 
SPs Files Times [utc] Type No. CMPs Status Remark
3205-11353205 - 113509:40:08 - 14:01:49Unknown0Valid 
1134-07871134 - 78714:01:56 - 14:47:57Unknown16UnknownShooting on Run-out at Client's Request

Positioning remark 
SP 2726-2659 DNP'd d/t compressor failure
Line ok

Acquisition remark 
SP 2727 : LGSP before compressor failure. SP 2723 Guns disabled. Stbd. engine fuel leak.
SP's 2726-2659 : Do Not Process.
SP 2658 : FGSP Guns on at full pressure.
Vessel speed @ 4 knts. due to stbd engine down.
SP 2517 : Vessel speed @ 5 knts. Stbd, engine on line.
No EOL noise records.
Shooting on Run-out


Tape-List
 
Stream AF 
Reel Shots Files No. shots Deck Missing Shots Remark
13713235 -  23863235 -  23868501  
13722385 -  15362385 -  15368502  
13731535 -  7871535 -  7877933 LSP 787

Stream AF_copy 
Reel Shots Files No. shots Deck Missing Shots Remark
53713235 -  23863235 -  23868504  
53722385 -  15362385 -  15368505  
53731535 -  7871535 -  7877936 LSP 787


Annotations
 
NTBP 
Shot(s) File(s) Streamer No(s) Trace(s) Type Seismic datatype Remark
2726-26592726-2659ALLALLDNPAFDo Not Process. Compressor failure.
2723-26592723-2659ALLALLGun disabledAFAll Guns disabled.
ALLALL8212-213Noisy Trace(s)AFNoisy trace(s)
ALLALL749Noisy Trace(s)AFNoisy trace(s)
ALLALL698Spiking AF TracesAFSpiking AF trace(s)
ALLALL6159Dead trace(s)AFAF traces dead
ALLALL4190Spiking AF TracesAFSpiking AF trace(s)
ALLALL4230Spiking AF TracesAFSpiking AF trace(s)
ALLALL8268Noisy Trace(s)AFNoisy trace(s)
ALLALL8271Noisy Trace(s)AFNoisy trace(s)
ALLALL5272Spiking AF TracesAFSpiking AF trace(s)

Warnings 
Shot(s) File(s) Streamer No(s) Trace(s) Type Seismic datatype Remark
28762876ALLALLIncomplete external headerAFBlock TRIGUN missing
26572657ALLALLGun timing errorAFTD Gun 3-2 error (ms) : 1.4
23912391ALLALLIncomplete external headerAFBlock TRIGUN missing
ALLALL513Weak Trace(s)AFTrace amplitude visibly lower than adjacent traces
ALLALL536Weak Trace(s)AFTrace amplitude visibly lower than adjacent traces
ALLALL552Weak 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
ALLALL8292Weak Trace(s)AFTrace amplitude visibly lower than adjacent traces
ALLALL8319Weak Trace(s)AFTrace amplitude visibly lower than adjacent traces

Comments 
Shot(s) File(s) Streamer No(s) Trace(s) Type Seismic datatype Remark
32283228ALLALLNoise RecordAFSOL Noise Record
32053205ALLALLSOLAFBOL First Production Shot point
27272727ALLALLLGSPAFLast good SP before pressure drop.
26582658ALLALLFGSPAFFirst good SP Guns on, at full pressure.
11351135ALLALLEOLAFLast Production Shot Point
787787ALLALLLSPAFShooting on run out



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: 0055, Line name: GAP07B1824P055, Seismic datatype(s): AF - Locked date: 16-Apr-2007 17:14:55
GENERATED Monday, April 16, 2007 5:16:15 PM GMT+00:00