612WAB® enables critical isolation in deep water application

WAB - Welltec Annular Barrirer - case story JCO151381

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

Background

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.

Solution

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.

Operation

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.

II

WAB for slim hole cement assurance prevents water production.

Well schematics

1036X518 Jco151381 612Wab Enables Critical Isolation In Deep Water Application Webformat

Products applied

WAB for Well Completion (Welltec Annular Barrier)

WAB® for Zonal Isolation

Extended reach, cementless lower completions via rotatable, metal expandable packers

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