ACQUISITION REPORT Sequence-0100
 Survey:  
  Client Esso Australia Pty Ltd
  Area Northern Fields 3D
  Vessel GECO_BETA
  JobNumber 9170A
  Survey Type 8 STREAMER DUAL SOURCE
   
 Sequence  
  Linename G01A3248A100
  Preplot G01A3248
  Direction 18.0°
  SOL Date 16:58:35utc 01-Dec-2001
  EOL Date 22:44:33utc 01-Dec-2001
 Attributes:  
   Wind Force 10.0 [knots] Dir NE
   Swell Height 1.5 [meters] Dir SW
   Propellor rpm   [avg]  
   Propellor pitch 98 [avg]  
       
  SOL EOL  
   Waterdepth 62.0 43.3 [meters]
   Bottomspeed  4.1 4.5 [knots]
   Featherangle sb +9.4 sb +2.0 [deg]
   Cable noise 12.9 6.29 [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)   1616 - 1619  
   SOL Dummy Record(s) 1620 - 1647 1620 - 1647 16:54:26 - 16:58:26
   FSP Start of Line 1648 1648 16:58:35
   MSP      
   LSP End of Line 4140 4140 22:44:33
   EOL Dummy Record(s) 4141 - 4141 4141 - 4141 22:44:41 - 22:44:41
   EOL Noise Record(s)   4141 - 4142  
 Line-segments:
    SPs Files Times [utc] Type # CMPs Status Remarks
    1648 - 2515 1648 - 2515 16:58:35-19:03:10 Prime 0 Scratched Sctratche due to swell noise
    2516 - 3133 2516 - 3133 19:03:18-20:28:54 Unknown 0 Scratched No guns fired dt sighting of whales NDR 2525-3104
    3134 - 4140 3134 - 4140 20:29:03-22:44:33 Prime 16 Valid  
 Remarks:      
   Navigation Streamer depth at 7.0m    
   Recording QC Filter delay 5.6ms. Frontsheet Set 4. Gundepth calibrated at atmospheric pressure 1004mB, pressure now 1015mB. Str 8 Bird 1 mask on External Header, occasionally deep, 8.1m. STB Guns firing on ODD SP. FGSP 3134    

Tape-list
Stream 1
   Shot(s) Files Deck Reel Remark
  1616 - 2045 1616 - 2045 1 402  
  2046 - 2372 2046 - 2372 1 403  
  2373 - 2475 2373 - 2475 2 404  
  2476 - 3485 2476 - 3485 1 405  
  3486 - 3915 3486 - 3915 1 406  
  3916 - 4142 3916 - 4142 2 407  
Stream 2
   Shot(s) Files Deck Reel Remark
  1616 - 2045 1616 - 2045 3 402  
  2046 - 2372 2046 - 2372 4 403  
  2373 - 2475 2373 - 2475 3 404  
  2476 - 3485 2476 - 3485 4 405  
  3486 - 3915 3486 - 3915 3 406  
  3916 - 4142 3916 - 4142 4 407  

Seismic Data Annotations

NTBP
Shot(s)     File(s) Trace(s) Type Remark
ALL     ALL- 2220 Killed traces  
ALL     ALL 1191, 2807 Weak Trace(s) Trace signal less than -6dB of nominal value
ALL     ALL 839 Noisy Trace(s)  
2525-3104       ALL Missing File Files not recorded by recording system
Warning
Shot(s)     File(s) Trace(s) Type Remark
ALL     ALL 2577-2581 Bird depth out of spec Bird C8-1 deep all the line, max 8.4 m
ALL     ALL 2209-2213 Bird depth out of spec Bird C7-1 often deep, max 8.2 m
ALL     ALL 1-9, 11-12, 15-16, 369-379, 737-749, 751, 1105-1113, 1126, 1130, 1473, 1484, 1489, 1499, 1841-1846, 1848-1850, 1852, 1855-1856, 2577, 2585, 2588 Slope alarm > 5% of total line
2189     2189 ALL Gun timing error Gun 2-2 error (ms) : -1.6
2306-2315     2306-2315 2675-2691 Bird depth out of spec Bird C8-6
3217     3217 ALL Gun timing error Gun 2-2 error (ms) : -1.7
3260-3271     3260-3271 2307-2323 Bird depth out of spec Bird C7-6
3275     3275 ALL Gun timing error Gun 2-2 error (ms) : -1.8
3425     3425 ALL Gun timing error Gun 2-2 error (ms) : -1.7
3513     3513 ALL Gun timing error Gun 2-2 error (ms) : -1.6
Comment
Shot(s)     File(s) Trace(s) Type Remark
1648     1648 ALL Swell Noise Swell noise ambient noise = 8-12uB affecting 8-12% of traces.
2203     2203 ALL Swell Noise Swell noise ambient noise = 8-12uB affecting 8-12% of traces.Swell noise decreased ambient noise = 5-10uB affecting 5-10% of traces.
2516-2894     2516- ALL Gun disabled All gun disabled due to whale sighting
2895       ALL Gun enabled First Shot of Soft Start after whale sighting
3134     3134 ALL FGSP First Good SP
3135     3135 ALL Swell Noise Swell noise now ambient noise < 5 uB affecting < 5% of traces.


 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 07:52:50utc 02-Dec-2001