812WAB® provides isolation of high water saturation

Zonal isolation
WAB - Welltec Annular Barrier - case story JCA182958
  • Well type Oil producer
  • Reservoir type Sandstone
  • Product / placement 812WAB / open hole
  • Isolation of high water saturation zone Reduces water-cut while increasing oil production
  • Welltec and client collaboration results In successful deployment & efficient rig time.
  • Short term delivery requirement Facilitated by Welltec manufacturing capability
  • Increased NPV By negating redundancy associated with swells
  • Location Canada


A client operating in Offshore Atlantic Canada was having challenges with successfully isolating high water saturation intervals within the reservoir using swell packers in their infill wells. It is believed that the high water saturation was a result of near-by water injectors breaking through via the high permeability and faults within the intervals.

The client approached Welltec® regarding this challenge, and a solution was developed with a high level of collaboration between Welltec sales, manufacturing, and operations.


Initially 2 x 812WAB5:5 were successfully installed the 1st of 2 wells for water breakthrough isolation and a further 5 x 812WAB5:5 were successfully installed in the second well.


Incorporation of the Welltec Annular Barrier (WAB), as a robust, rapid set alternate to the previously failed swells, lead to a significant reduction in water cut to 3.2% & 4.2% respectively for each well and an increase in production efficiency.

Furthermore, the lead time for initial supply was very short (1 month). As Welltec were able to provide a timely and superior WAB solution, this was another added value differentiation, that drove the client to work with Welltec Completions.

WAB open hole zonal isolation maximizes production, reduces water-cut, and eliminates risk and uncertainty associated with swell packers while making more efficient use of CAPEX.

Zonal isolation
JCA182958 Rigtig Str. Border