Field Trial Angola

Well Intervention with Wel-lok™ WSO

Status

Location:
Angola
Environment:
Offshore
Deviation:
60º
Depth:
11,500'
Downhole Pressure:
3000psi
Temperature:
68ºC
Setting ID:
4.892"
Restriction:
0.000"
Sealing ID:
9.500"

Identification of problem

Provide a seal in the production string and annulus to shut off a lower water producing zone.

  • Well 1 was producing approximately 3,600 bopd with 70% water production
  • Well 2 was producing 100% water with no oil production

Issues to overcome

Traditional methods of reducing water production from a well included setting multiple bridge plugs in the production string or perforating the production string and squeezing cement or a resin. Bridge plugs only baffle the water, slowing it down but not stopping it, as they cannot seal the annulus outside of the production string. Resins require perforations to access the annulus, damaging the production string.

Application

Wel-lok™ WSO (water shut off tool) was set in both the wells as follows:

  • Well 1 – Wel-lok™ WSO was set inside of a 5.5” OD screen and sealed inside a 9.5” ID open hole
  • Well 2 – Wel-lok™ WSO was set inside of a 5” OD screen and sealed inside an 8.5” ID open hole

Outcomes/Conclusion

Well 1 – After 2 months of production, water production has decreased from 70% to 54% and oil production has increased from 3,600 bopd to 5,000 bopd

Well 2 – After 2 months of production, water production has decreased from 100% to 45% and oil production has increased from 0 bopd to 1,300 bopd

Both Well Intervention jobs were deemed a huge success by the operator, particularly Well 2 that had previously been shut in due to lack of production. The operator has since discussed with BiSN opportunities to run their tools, WSO as well as others, in additional wells throughout the world.

About the application

The Wel-lok™ WSO (Water Shut Off) has been specifically developed to reduce unwanted water production from wells with sand screen and open hole gravel pack completions (OHGP). Unlike any other solution on the market, the Wel-lok™ WSO tool seals the annulus and the wellbore in one operation without the need to perforate the sandscreen or squeeze the alloy into the open hole annulus. The melted alloy fills inside the completion and in the annulus to form a metal to metal sealing solution that is seamless, significantly reducing unwanted water production.

Water Shut Off - BiSN
Water Shut Off - BiSN
Water Shut Off - BiSN
Water Shut Off - BiSN

How it works…

The Wel-lok™ WSO (Water Shut Off) has been specifically developed to reduce unwanted water production from wells with sand screen and open hole gravel pack completions (OHGP).

Get in touch and find a
permanent solution for your well

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