ACQUISITION REPORT

Locked date: 11-Apr-2007 04:17:58


Sequence: 0030, Line name: GAP07B1536P030, Seismic datatype(s): AF


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

Sequence
Line NameGAP07B1536P030
Preplot Line Name1536
Direction197.0°
Chargeable Line Length17118.75m
SOL Time (utc)05:11:07 10-Apr-2007
EOL Time (utc)06:31:09 10-Apr-2007

Attributes
Wind Speed / Direction10.0 / NW[knots]
Swell Height / Direction1.0 / N[meters]
Propeller Speed126[avg rpm]
Propeller Pitch68[avg %]

  SOL EOL 
Bottom Speed4.80.0[knots]
Water Depth1348.00.0[meters]
Feather Angle4.80.0[deg]
Sources Volume s1,s2 ..3147, 31473147, 3147[cu inch]
Background Noise8.080.0[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)1992 - 1963 1992 - 1963 04:29:28 - 04:33:05 
FSP Start of Line1962 1962 05:11:07 10-Apr-2007 
MSP(midnight sp)   
LSP End of Line1050 1050 06:31:09 10-Apr-2007
EOL Dummy Record(s)1049 - 1040 1049 - 1040 06:30:32 - 06:31:41 
EOL Noise Record(s)   

Line-segments 
SPs Files Times [utc] Type No. CMPs Status Remark
1962-16871962 - 168704:33:12 - 05:09:02Unknown0ScratchedGun string 2+3 problems
1688-10501688 - 105005:08:55 - 06:30:24Prime16ValidFGSP-EOL

Positioning remark 
FGSP 1688 d/t Gun sep problem

4:29 14:29 1992 FDSP

4:33 14:33 1962 FSP/SOL
DC -4m F/A 0.9W Depth 1224m

Separation between Array #2 and #3 very low. 4:48 14:48 SOL aborted, picking up arrays #2 and#3 to sort out seperation problems
5:02 15:02 Gunstsring going out again

5:08 15:08 1688 FGSP of the line after guns put back in place DC -20m F/A 4.1W

6:16 16:16 1157 LPPSP

6:30 16:30 1050 LFFSP Shooting on runout at clients request. DC -15m F/A 3.7W Depth 445m

6:31 16:31 1040 LDSP Fishing boat ahead on path, bridge taking in manual and turning away
Unable to shot on turn d/t fishing boat and need to fix GS-2


Acquisition remark 
Sp. 1985 : SOL Noise Record
Sp. 1962 : SOL @ 04:33
Sp. 1962 - 1689 : DNP
Sp' 1688 : FGSP @ 05:08 Gun 2-2 disabled. Source 1 volume 2912 cu. ins.
Sp. 1050 : EOL @ 06:30


Tape-List
 
Stream AF 
Reel Shots Files No. shots Deck Missing Shots Remark
13161992 -  11431992 -  11438502 FGSp. 1688
13171142 -  10401142 -  1040993  

Stream AF_copy 
Reel Shots Files No. shots Deck Missing Shots Remark
53161992 -  11431992 -  11438505  
53171142 -  10401142 -  1040996  


Annotations
 
NTBP 
Shot(s) File(s) Streamer No(s) Trace(s) Type Seismic datatype Remark
1962-16891962-1689ALLALLFGSPAFFGSP d/t gun string 2-3 tangle
14611461ALLALLIncomplete external headerAFBlock TRIGUN missing
14121412ALLALLIncomplete external headerAFBlock TRIGUN missing
13401340ALLALLIncomplete external headerAFBlock TRIGUN missing
ALLALL6130-131Spiking AF TracesAFSpiking AF trace(s)
ALLALL749Noisy Trace(s)AFNoisy trace(s)
ALLALL874Noisy Trace(s)AFNoisy trace(s)
ALLALL698Noisy Trace(s)AFNoisy trace(s)
ALLALL6128Spiking AF TracesAFSpiking AF trace(s)
ALLALL6133Noisy Trace(s)AFNoisy trace(s)
ALLALL6135Spiking AF TracesAFSpiking AF trace(s)
ALLALL6159Dead trace(s)AFAF traces dead
ALLALL4190Dead trace(s)AFAF traces dead
ALLALL8212Noisy Trace(s)AFNoisy trace(s)
ALLALL8213Noisy Trace(s)AFNoisy trace(s)
ALLALL4222Noisy Trace(s)AFNoisy trace(s)
ALLALL4223Noisy Trace(s)AFNoisy trace(s)
ALLALL8258Noisy Trace(s)AFNoisy trace(s)
ALLALL8271Noisy Trace(s)AFNoisy trace(s)
ALLALL3296Noisy Trace(s)AFNoisy trace(s)
ALLALL3297Noisy Trace(s)AFNoisy trace(s)

Warnings 
Shot(s) File(s) Streamer No(s) Trace(s) Type Seismic datatype Remark
10501050ALLALLEOL/LSPAF 
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
ALLALL6289Weak Trace(s)AFTrace amplitude visibly lower than adjacent traces
ALLALL8292Weak Trace(s)AFTrace amplitude visibly lower than adjacent traces
ALLALL3309Weak Trace(s)AFTrace amplitude visibly lower than adjacent traces
ALLALL8319Weak Trace(s)AFTrace amplitude visibly lower than adjacent traces



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: 0030, Line name: GAP07B1536P030, Seismic datatype(s): AF - Locked date: 11-Apr-2007 04:17:58
GENERATED Wednesday, April 11, 2007 4:18:52 AM GMT+00:00