SpectrumData SegyProc V1.72 - Tue Jun 09 13:05:24 2009 Report File: 053.CHK Operation: Segy cartridge Summary Source: 0, FILERS, 3676745.053 O/S: Windows NT/2000/XP (supports 0K buffer) O/S: Windows NT/2000/XP (supports 1MB buffer) Read Mode: Variable (Slow) Buffer size: 1040384 File: 1 EBCDIC HEADER (SEGY) -------------------- C 1 CLIENT: BHPBILLITON. CONTRACTOR: WESTERNGECO C 2 SURVEY: OTWAY BASIN 2D PROCESSING 2008 PERMIT: VIC/P44 C 3 PROCESS: FINAL RAW PrSTM ANGLESTACK (6 to 30 DEG) C 4 DATE: 16th February 2008; LINE: OE80A-1042 C 5 C 6 PROCESSING SEQUENCE: C 7 REFORMAT: REC.LENGTH 5000ms. SAMPLE RATE 2ms C 8 RECORDING DELAY: -51.2ms C 9 MARINE GEOMETRY: 96 CHANNEL. SPINT 25.0M. GPINT 25.0M. C10 LOAD DIGITIZED WATERBOTTOM HORIZON AND SHOTPOINT XYS TO TRACE HEADERS C11 LOW CUT FILTER: 3HZ (18dB/Oct) C12 SPHERICAL DIVERGENCE CORRECTION USING PAST PROCESSING VELOCITY FIELD C13 TRACE EDITS FROM OBSERVERS LOGS C14 OFFSET DOMAIN SWATT: 2 PASSES: 0-20Hz inc 2HZ; TV THRESH; 21 TRACE FILTER C15 OFFSET DOMAIN SWATT: 2 PASSES: 0-125Hz inc 10HZ; TV THRESH; 21 TRACE FILTER C16 WBDESIG: SHAPE SOURCE WVLT TO ZEROPHASE TARGET WVLT / RESAMPLE TO 3MS C17 NMO F-K FILTER: SHOT DOMAIN: +/-5000m/s (COSINE TAPER 2000m/s). RAGC 500ms C18 EXTRAPOLATION TO ZERO OFFSET C19 WATERLAYER DEMULTIPLE (DWD) C20 C21 MULTIPASS SRME: MODEL + REMOVE SURFACE MULTIPLES (2 PASSES) C22 REJECT EXTRAPOLATED TRACES C23 CMP SORT / FIRST PASS VELOCITY ANALYSES AT 1KM INTERVAL C24 SHOT SORT / EXTRAP TO ZERO OFFSET / CMP SORT / 2:1 TRACE INTERP WITHIN CMPS C25 HIGH RESOLUTION RADON DML: TV% STACKVEL NMO CORRECTION PRIOR TO DML C26 RADON DML (cont): RAGC 300MS. MOVEOUT -500to1500MS. SIGNAL -500to50ms C27 REJECT EXTRAPOLATED AND INTERPOLATED TRACES C28 SORT TO COMMON OFFSET ORDER C29 HIGHCUT FILT(PRE PSTM): 0s+125Hz 1s+115Hz 2s+105Hz 2.6s+96Hz 4s+80Hz 5s+70Hz C30 TARGETED PRE STACK TIME MIGRATION VELOCITY ANALYSES: 0.5KM ANALYSIS INTERVAL C31 PRESTK TIME MIGRN: 4KM VELSMTH. CURVED RAY. 3000M HALF APER. 60 DEG MAXDIPS C32 SORT TO CDPS / HDVA VELOCITY ANALYSES: 50M ANALYSIS INTERVAL C33 NMO: APPLIED USING TIME VARIANT TRIM MEAN SMOOTHED HDVA VELOCITIES C34 OFFSET WEIGHTING / ANGLE MUTE / STACK / GUN+CABLE CORR: +14MS C35 EXPGAIN 8dB/sec FROM WBT to WBT + 3000MS C36 C37 TRACE HEADER BYTE LOCATION INFO: C38 LINE: BYTE 9-12. SHOTPOINT AT SOURCE: BYTE 17-20 CDP: BYTE 21-24. C39 WBOTTOM TIME x 10: BYTE 137-138 WBOTTOM DEPTH x 10: BYTE 45-48 C40 XCORD MIDPT x 10: BYTE 53-56. YCORD MIDPT x 10: BYTE 57-60 BINARY HEADER ------------- Job ID: 17 Line Number: 0 Reel Number: 0 Traces 48 (Data) 0 (Auxiliary) Sample Interval 3000 (Reel) 0 (Original) (in microsecs) Samples/Trace 1667 (Reel) 0 (Original) Format Code: 1 CDP Fold: 001 Sorting: 2 Vert.Sum: 48 Computed Trace Size is 6908 bytes TRACE DETAILS ------------- Tr.No. Tr.No. SP FFID Tr.No CDP No. Tr.No. Trace Prod. Rec. X Y Line Reel Orig. CDP Type /Test Len. In 1- 4 5- 8 17-20 9-12 13-16 21-24 25-28 29-30 35-36 73-76 77-80 ------------------------------------------------------------------------------------------------ 1 1 1 2143 1042 1 1 1 1 1 6908 634476 5679478 2 2 2 2143 1042 1 2 1 1 1 6908 634484 5679488 3 3 3 2144 1042 1 3 1 1 1 6908 634491 5679497 4 4 4 2144 1042 1 4 1 1 1 6908 634499 5679507 5 5 5 2145 1042 1 5 1 1 1 6908 634507 5679517 6 6 6 2145 1042 1 6 1 1 1 6908 634515 5679527 7 7 7 2146 1042 1 7 1 1 1 6908 634522 5679536 8 8 8 2146 1042 1 8 1 1 1 6908 634530 5679546 9 9 9 2147 1042 1 9 1 1 1 6908 634538 5679556 10 10 10 2147 1042 1 10 1 1 1 6908 634546 5679566 ...skipped ...skip -1 traces 10 2019 2019 3152 1042 1 2019 1 1 1 6908 649528 5699710 ...skipped 11 2020 2020 3152 1042 1 2020 1 1 1 6908 649535 5699720 ------------------------------------------------------------------------------------------------ File Summary: File Blocks Total Size Min Blk. Max Blk. 1 13 79,588 400 6908 ------------------------------------------------------------------------------------------------ *** Total size above is computed assuming a constant trace size Started at: Tue Jun 09 13:05:24 2009 Ended at: Tue Jun 09 13:05:25 2009 Elapsed time: 1 sec Total Files/Blocks: 1 / 14 Total Size: 84 KB Throughput: 0 MB/min (adjusted 0 MB/min) FFID Range: 1042 CDP Range: 1:10,2019:2020 SP Range: 2143*,2144*,2145*,2146*,2147*,3152