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Advanced Processing Techniques for CMP Data Analysis: Time Drift and Background Correction

This document outlines the critical steps taken for processing CMP (Common Midpoint) data, including time zero drift correction, background correction to eliminate unwanted reflections, and automatic gain control (AGC) settings. A histogram stretch method is applied to enhance dynamic range visibility. Observations indicate significant missing data at specific CMPs, with preliminary interpretations suggesting that most reflections are non-planar. A thorough analysis of joint and fracture zones across multiple lines is presented, providing insight into data trends and anomalies.

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Advanced Processing Techniques for CMP Data Analysis: Time Drift and Background Correction

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  1. Site 2

  2. Lines

  3. Processing • Time zero drift correction - time zero shifted as the profiles were run • Background correction - removes flat reflections or ringing that are seen in the entire line.  • AGC - window 10 ns; Max Gain 1000 • Histogram stretch - 10% of the data is clipped to increase viewing dynamic range • Big white spots in the middle of the data show missing data

  4. CMPs All CMP’s were run at a traverse at 30m on the line -0.23 m offset SE of the DC res line

  5. Processing • AGC - window 10 ns; Max Gain 1000 • Histogram stretch - 5% of the data is clipped to increase viewing dynamic range • Interpretations were made on 200HHGood and then kept the same for all CMPs

  6. Preliminary InterpretationNothing here is finalized!Most of the reflections seem to be out of the plane

  7. Line -0.23m

  8. Joint 1 • 0.23 strongest in VV • Crosses line @ 2.3m @  = 29o • 0.33 • Crosses line @ 2.1m @ =18o • 0.43 • Crosses line @ 1.9m @ =18o

  9. 3.27 m 6.54 m 9.81 m 13.08 m 16.36 m 19.63 m C A D E B I G H J F 22.90 m Columns Fracture Zones Columns

  10. 3.27 m 6.54 m 9.81 m 13.08 m 16.36 m 19.63 m C A D E B I G H J F 22.90 m

  11. 3.27 m 6.54 m 9.81 m 13.08 m 16.36 m 19.63 m C A D E B I G H J F 22.90 m

  12. 3.27 m 6.54 m 9.81 m 13.08 m 16.36 m 19.63 m C A D E B I G H J F 22.90 m

  13. 3.27 m 6.54 m 9.81 m 13.08 m 16.36 m 19.63 m C A D E B I G H J F 22.90 m

  14. Line -0.33m

  15. 3.27 m 6.54 m 9.81 m 13.08 m 16.36 m 19.63 m C A D B 22.90 m

  16. 3.27 m 6.54 m 9.81 m 13.08 m 16.36 m 19.63 m C A D B 22.90 m

  17. Line -0.43m

  18. 3.27 m 6.54 m 9.81 m 13.08 m 16.36 m 19.63 m C A D E B I G H J F 22.90 m

  19. 3.27 m 6.54 m 9.81 m 13.08 m 16.36 m 19.63 m C A D E B I G H J F 22.90 m

  20. Line -1.73m

  21. 3.27 m 6.54 m 9.81 m 13.08 m 16.36 m 19.63 m C A D E B I G H J F 22.90 m

  22. 3.27 m 6.54 m 9.81 m 13.08 m 16.36 m 19.63 m C E F H Ia A B I G J 22.90 m

  23. 3.27 m 6.54 m 9.81 m 13.08 m 16.36 m 19.63 m C E F H Ia A B I G J 22.90 m

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