Cement Plug Placement

Setting a cement plug on the target zone either creates a solid seal to stop fluid movement or provides a kick-off point for sidetrack drilling operations. The process involves pumping cement slurry down the work string into the targeted zone, removing the work string from the cement column and allowing the cement slurry to harden in the wellbore. The volume of spacers pumped ahead and behind cement and the volume of displacement is critical to the quality of the cement plug. The traditional method is to pump all the fluids until each fluid level is equal to that inside the string. The limitation to this method is that the fluid could be contaminated once the string is pulled out of the hole due to variable fluid densities as well as wellbore and work string sizes.

The software models the displacement hydraulics of fluids and simulates fluids contamination during pipe pull out of hole. Software aids in optimizing the pumping schedule to minimize contamination within the cement slurry and spacer once the work string is pulled out of hole, ultimately, enhancing wellbore integrity..

Features

  • Balance slurry and/or spacer levels
  • Option of under-displacement volume
  • Customized pumping schedule
  • Fluid mixing during pull out of the hole (POOH)
  • Circulating temperature
  • ECDs/pressures at various depth vs. time
  • Snaptshot of hydrostatic/total pressure profile
  • Results automatically exported into Microsoft Word® with output options