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FE 02-16C Depth and ROP

•All depths are measured at the “kelly down” position

•The depth is the sum of the BHA, drillstring and the kelly below the kelly bushing or the BHA, drillstring and the TDS below the rotary table

•Get “kelly down” positions from the pipe tally book

ppt 15 trang xuanthi 28/12/2022 2660
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Nội dung text: FE 02-16C Depth and ROP

  1. Depth and ROP • One of the most important parameters to be monitored • ROP is possibly a first indication of hole problems and show intervals • Depth is measured in feet or meters • ROP is measured in ft/hr, m/hr, mins/ft or mins/m
  2. Pipe Tally Book • The information found in the pipe tally book usually looks like this: 31.03 S 8105.32 8147.32 30.97 D 8136.29 8178.79 31.00 -88- 8167.29 8209.79 or 93.05 -87- 8054.29 8096.29 93.00 -88- 8167.29 8209.29
  3. Drawworks Sensor
  4. Proximity Sensors
  5. Depth Sensor Installation for Floaters
  6. Depth Corrections: Mud Log • Depth corrections must be indicated in the mudlogs • Example: – NOTE: Correction from 10,060’ to 10,035’ due to SLM NOTE: Correction from 10,060’ to 10,035’ due to SLM
  7. Correlation of ROP With Other Logs • ROP plot if plotted with values increasing from right should match up with an SP or GR log • Can be used with other logs to determine formation tops • Lithology interpretation