ACQUISITION REPORT Sequence-0827
 Survey:  
  Client ESSO Australia Pty Ltd
  Area Northern Fields 3D
  Vessel Geco Beta
  JobNumber 9170C
  Survey Type 3D, Dual source, 8 Streamers
   
 Sequence  
  Linename G01A2192PSN827
  Preplot G01A2192SN
  Direction 108.0°
  SOL Date 16:08:28utc 02-Mar-2002
  EOL Date 16:38:19utc 02-Mar-2002
 Attributes:  
   Wind Force 15.0 [knots] Dir W
   Swell Height 1.5 [meters] Dir SW
   Propellor rpm 122 [avg]  
   Propellor pitch 98 [avg]  
       
  SOL EOL  
   Waterdepth 50.0 52.0 [meters]
   Bottomspeed  4.0 4.1 [knots]
   Featherangle sb +5.0 sb +4.5 [deg]
   Cable noise 10.39 10.8 [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)   3944 - 3943  
   SOL Dummy Record(s) 3942 - 3913 3942 - 3913 16:03:57 - 16:08:18
   FSP Start of Line 3912 3912 16:08:28
   MSP      
   LSP End of Line 3711 3711 16:38:19
   EOL Dummy Record(s)      
   EOL Noise Record(s)   3710 - 3709  
 Line-segments:
    SPs Files Times [utc] Type # CMPs Status Remarks
    3912 - 3711 3912 - 3711 16:08:28-16:38:19 Prime 16 Valid FRONT HALF ALL STREAMERS NTBP dt Pre-aquired coverage
 Remarks:      
   Navigation Streamer depth 7m. NAVRT External Header Block defines Job No. 9170C    
   Recording QC Filter delay 5.6ms. Frontsheet Set 4. Gundepth calibrated at atmospheric pressure 1017mB, pressure now 1021mB. SSE functions on TRISOR disabled, GUNPOS block NOT recorded. STB gun firing on ODD SP.    

Tape-list
Stream 1
   Shot(s) Files Deck Reel Remark
  3944 - 3709 3944 - 3709 2 10027  
Stream 2
   Shot(s) Files Deck Reel Remark
  3944 - 3709 3944 - 3709 4 10027  

Seismic Data Annotations

NTBP
Shot(s)     File(s) Trace(s) Type Remark
ALL     ALL 1476, 1633 Weak Trace(s) Trace signal less than -6dB of nominal value
ALL     ALL 109, 1657, 2307, 2772 Spiking Trace(s)  
ALL     ALL 1495 Noisy Trace(s)  
ALL     ALL 2599 Killed Trace(s)  
ALL     ALL 1-184 Noisy Trace(s) NTBP due to swell noise & pre-acquired coverage
ALL     ALL 369-552 Noisy Trace(s) NTBP due to swell noise & pre-acquired coverage
ALL     ALL 737-920 Noisy Trace(s) NTBP due to swell noise & pre-acquired coverage
ALL     ALL 1105-1288 Noisy Trace(s) NTBP due to swell noise & pre-acquired coverage
ALL     ALL 1473-1656 Noisy Trace(s) NTBP due to swell noise & pre-acquired coverage
ALL     ALL 1841-2024 Noisy Trace(s) NTBP due to swell noise & pre-acquired coverage
ALL     ALL 2209-2392 Noisy Trace(s) NTBP due to swell noise & pre-acquired coverage
ALL     ALL 2577-2760 Noisy Trace(s) NTBP due to swell noise & pre-acquired coverage
4014       2307-2323 Bird depth out of spec Bird C7-6 going deep during the line, max depth m
Warning
Shot(s)     File(s) Trace(s) Type Remark
ALL     ALL 2267-2315 Streamer noise Low level tugging noise caused by caught object, negative apparent velocity only
4014       2209-2213 Bird depth out of spec Bird C7-1 occasional depth at 8.2-8.5m
Comment
Shot(s)     File(s) Trace(s) Type Remark
3862     3862 ALL Swell Noise Swell noise affecting 10% of traces, 6-8uB RMS


 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 23:59:04utc 03-Mar-2002