Our technologies encompass stand-alone innovative completion products that can be combined to form systems for use in conventional and unconventional wells.

Swellable elastomers provide inflow profile control in horizontal wells in fractured carbonate

Technical Background

  • Horizontal barefoot oil producers in Oman, PDO. Results compiled in Nov 2006. 
  • Hole: 7.6” for 3 ½” Tendeka SwellFix packer and 7” for 4 ½” Tendeka SwellFix packers. This case study focuses on 3 ½” Tendeka SwellFix packer packers and CT operated SSD’s for controlling water inflow. 
  • Upper reservoir uses gas oil gravity drainage, deeper reservoir uses water injection.


  • Injection of gas and water into fractured reservoir tends to water or gas the horizontal well out which damages matrix drainage process.
  • To date 51 horizontal producers and 26 horizontal injectors have been drilled (17 are multi-laterals). Despite fractures shut off by scab liners and expandable 5 ½” liners high water production exists. 27 barefoot horizontal wells producing with water cuts >50%, or are closed due to such high water cuts. 

Project Objectives

  • Trial Tendeka SwellFix Packer completion to control inflow in fractured carbonate reservoir to reduce unwanted water production and improve ultimate recovery.

Tendeka Solution

  • Expandable Zonal Isolation Profiler (Tendeka SwellFix Packer) – swellable rubber that is wrapped around standard tubing, placed into the open hole to swell and close off annulus. Currently uses CT to operate sleeve.

Project Results

  • Successfully re-completed 8 of 9 wells with Tendeka SwellFix Packer.
  • In 3 of 5 fully evaluated wells water rates reduced by 60%, proves concept that Tendeka SwellFix Packer shuts water off.
  • Oil gains of up to 45m3/d per well in 3 wells.
  • Further investigations necessary to optimize Tendeka SwellFix Packer potential.


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