Well Type
Heavy oil producer
Reservoir type
Sand
PRODUCT / PLACEMENT
612WAB / open hole
SUCCESSFUL WATER ISOLATION
Reaches planned production plateau earlier
ENHANCED WELL CONSTRUCTION REDUCES
Risk of water production
CAPEX & OPEX Effective
Zonal isolation increases reserve recovery
WELLTEC AND CLIENT COLLABORATION
Upgraded qualification enables flexible deployment
Location
Congo
An IOC in Congo had cement placement concerns due to a combination of 6 ½” open hole across a short, deviated reservoir section and 4 ½” liner, therefore resulting in low volumes of cement across this deviated section.
Conventional solutions considered would result in increasing cement volume:
Under reaming to 7 1/8” = extra rig time
Shoe track extended = breakthrough into the oil / water contact
Within this challenging application, zonal isolation was critical to optimizing acid stimulation pre-flush.
The Welltec Annular Barrier (WAB) forms a combined barrier with cement for acid stim and water isolation. WAB installed and expanded on a single trip with liner hanger.
Caliper log run indicating good hole at WAB setting depths.
Qty three WAB made up as part of the liner BHA, spaced out for zonal isolation and water isolation. Plug bumped and all WAB expanded, quickly under surface control, in wet cement.
WAB for slim hole cement assurance prevents water production.
WAB® for Zonal Isolation
Extended reach, cementless lower completions via rotatable, metal expandable packers