ACQUISITION REPORT Sequence-0255
 Survey:  
  Client Esso Australia Pty Ltd
  Area Northern Fields 3D
  Vessel GECO_BETA
  JobNumber 9170A
  Survey Type 8 STREAMER DUAL SOURCE
   
 Sequence  
  Linename G01A1568A255
  Preplot G01A1568
  Direction 198.0°
  SOL Date 01:37:26utc 04-Feb-2002
  EOL Date 05:02:58utc 04-Feb-2002
 Attributes:  
   Wind Force 20.0 [knots] Dir SSW
   Swell Height 1.5 [meters] Dir SE
   Propellor rpm 122 [avg]  
   Propellor pitch 98 [avg]  
       
  SOL EOL  
   Waterdepth 26.0 40.0 [meters]
   Bottomspeed  4.3 4.8 [knots]
   Featherangle port -3.3 sb +9.6 [deg]
   Cable noise 5.6 46.3 [µBar rms]
   Lowcut filter 3 3 [hz]
   Filter slope 18 18 [dB]
   Port Volume 3542 3542  
   Stbd Volume 3542 3542  

Source Configuration
Source Position Inline Crossline Nominal Nom. Vol. Subarray Gun
Number   Offset [m] Offset [m] Depth [m] [inch ³] Count Count
1 STBD -345.0 25.0 -6.0 3542.0 3 24
2 PORT -345.0 -25.0 -6.0 3542.0 3 24

Streamer Configuration
Streamer Position Inline Crossline Nominal Length Type Group Channel Front-Tail
Number   Offset [m] Offset [m] Depth [m] [m]   Interval [m] Count  
1 STBD -520.0 350.0 -7.0 4600 Nessie-3 12.5 368 0001-0368
2 STBD -520.0 250.0 -7.0 4600 Nessie-3 12.5 368 0369-0736
3 STBD -520.0 150.0 -7.0 4600 Nessie-3 12.5 368 0737-1104
4 STBD -520.0 50.0 -7.0 4600 Nessie-3 12.5 368 1105-1472
5 PORT -520.0 -50.0 -7.0 4600 Nessie-3 12.5 368 1473-1840
6 PORT -520.0 -150.0 -7.0 4600 Nessie-3 12.5 368 1841-2208
7 PORT -520.0 -250.0 -7.0 4600 Nessie-3 12.5 368 2209-2576
8 PORT -520.0 -350.0 -7.0 4600 Nessie-3 12.5 368 2577-2944

Recording Configuration
Channel Descr. Recording Data RecLen Sample Chan Chan # Chan Chan # Filter
Set   Format Reduction [ss ¹] Int. [ms] In In Out Out Delay [ms]
1 NFH SEGD 8015, Rev.2 NONE 6.0 0.25 0036 0001-0036 0036 0001 - 0036 0.00
2 SEIS SEGD 8015, Rev.2 NONE 6.0 2.0 0368 0001-0368 0368 0001 - 0368 5.60
3 SEIS SEGD 8015, Rev.2 NONE 6.0 2.0 0368 0369-0736 0368 0369 - 0736 5.60
4 SEIS SEGD 8015, Rev.2 NONE 6.0 2.0 0368 0737-1104 0368 0737 - 1104 5.60
5 SEIS SEGD 8015, Rev.2 NONE 6.0 2.0 0368 1105-1472 0368 1105 - 1472 5.60
6 SEIS SEGD 8015, Rev.2 NONE 6.0 2.0 0368 1473-1840 0368 1473 - 1840 5.60
7 SEIS SEGD 8015, Rev.2 NONE 6.0 2.0 0368 1841-2208 0368 1841 - 2208 5.60
8 SEIS SEGD 8015, Rev.2 NONE 6.0 2.0 0368 2209-2576 0368 2209 - 2576 5.60
9 SEIS SEGD 8015, Rev.2 NONE 6.0 2.0 0368 2577-2944 0368 2577 - 2944 5.60

Production
  Shotpoint File Time [utc]
   SOL Noise Record(s)   2765 - 2764  
   SOL Dummy Record(s) 2763 - 2754 2763 - 2754 01:36:00 - 01:37:17
   FSP Start of Line 2753 2753 01:37:26
   MSP      
   LSP End of Line 1180 1180 05:02:58
   EOL Dummy Record(s)      
   EOL Noise Record(s)   1179 - 1179  
 Line-segments:
    SPs Files Times [utc] Type # CMPs Status Remarks
    2753 - 1400 2753 - 1400 01:37:26-04:35:40 Prime 16 Valid Line ended early d/t swell noise
    1399 - 1180 1399 - 1180 04:35:48-05:02:58 Prime 0 Scratched NTBP d/t swell noise
 Remarks:      
   Navigation Streamer depth at 7m. LGSP 1400 d/t swell noise.    
   Recording QC Filter delay 5.6ms. Frontsheet Set 4. Gundepth calibrated at atmospheric pressure 1017mB, pressure now 1022mB. SSE functions on TRISOR disabled, GUNPOS block NOT recorded. LGSP 1400 d/t swell noise    

Tape-list
Stream 1
   Shot(s) Files Deck Reel Remark
  2765 - 2336 2765 - 2336 1 1033  
  2335 - 1906 2335 - 1906 2 1034  
  1905 - 1476 1905 - 1476 1 1035  
  1475 - 1179 1475 - 1179 2 1036  
Stream 2
   Shot(s) Files Deck Reel Remark
  2765 - 2336 2765 - 2336 3 1033  
  2335 - 1906 2335 - 1906 3 1034  
  1905 - 1476 1905 - 1476 4 1035  
  1475 - 1179 1475 - 1179 3 1036  

Seismic Data Annotations

NTBP
Shot(s)     File(s) Trace(s) Type Remark
ALL     ALL 1495, 2307 Noisy Channel  
1749     1749 ALL Gun timing error Gun 1-2 error (ms) : -2.1
Warning
Shot(s)     File(s) Trace(s) Type Remark
ALL     ALL 2034 Fails Crossfeed  
ALL     ALL 1841-2208 Parity errors Low level parity errors observed streamer 6
ALL     ALL NONE Bad Compass Bird 5-5 bad compass
ALL     ALL 1-12, 16, 369-380, 737-752, 1105-1113, 1126, 1130, 1473, 1481, 1485, 1841-1856, 1860-1861, 2209-2226, 2229-2230, 2577-2593, 2601-2602 Slope alarm > 5% of total line
2703-2678     2703-2678 NONE Bird depth out of spec Bird C2-8 shallow min 5.7 mtrs, deep max 8.8 mtrs
2684-2672     2684-2672 NONE Bird depth out of spec Bird C2-9 shallow min 5.7 mtrs
2544     2544 ALL Gun timing error Gun 5-4 error (ms) : -1.3
2434     2434 ALL Gun timing error Gun 5-4 error (ms) : -1.4
2310     2310 ALL Gun Timing Error Gun 5-4 (-1.3 ms)
2294     2294 ALL Gun timing error Gun 5-4 error (ms) : -1.2
2264     2264 ALL Gun timing error Gun 5-4 error (ms) : -1.1
1896     1896 ALL Gun timing error Gun 5-4 error (ms) : -1.3
1845     1845 ALL Gun timing error Gun 1-2 error (ms) : -1.7
1690-1679     1690-1679 NONE Bird depth out of spec Bird C8-5 deep max 8.4 mtrs
1681-1675     1681-1675 NONE Bird depth out of spec Bird C7-6 deep max 8.3 mtrs
1524     1524 ALL Gun timing error Gun 5-4 error (ms) : -1.2
1516     1516 ALL Gun timing error Gun 5-4 error (ms) : -1.2
1407     1407 ALL Gun timing error Gun 2-6 error (ms) : -1.1
1406     1406 ALL Gun timing error Gun 5-4 error (ms) : -1.2
1404     1404 ALL Gun timing error Gun 5-4 error (ms) : -1.5
Comment
Shot(s)     File(s) Trace(s) Type Remark
ALL     ALL ALL Swell Noise Occ swell noise seen approx 5%. Increasing sp 1500 10-15%
1887     1887 ALL Sudden wind change Wind speed up 30kn ahead of cold front
1400     1400 ALL LGSP LGSP of line d/t swell noise


 List of used abbreviations:
     SOL/EOL  Start/End of line. 
     FSP/LSP  First/Last shotpoint of the line. 
     FCSP/LCSP  First/Last chargeable shotpoint
     MSP  Midnight (last) shotpoint of the day
     FGSP/LGSP  First/Last Good Shotpoint
     FOSP/LOSP  First/Last Overlap Shotpoint
     FSP/LSP R/O  First/Last Shotpoint Runout
   
     Deg  Degrees: e[0,360]
     rev  Revolutions
     utc  Universal Time Coordinated
     SPs  Shotpoints
     CMPs  Common midpoints
     NTBP  Not to be processed
     SI  Seismic interference
TRILOGY INFORMATION MANAGER - ACQUISITION REPORT - GENERATED 05:35:47utc 04-Feb-2002