Water Shut Off Application in Algeria

Identification of problem

A client encountered a well that was producing excessive water from the lower zone of a well. This was not only increasing the volume of water being produced which increased handling and disposal costs, but also decreasing the volume of hydrocarbon produced.

Issues to overcome

This well is produced through a slotted liner. Traditional methods of isolating a lower producing zone by setting bridge plugs in the liner would baffle the water production but not shut it off. Annular isolation in open-hole was required at elevated temperature (150 °C) and the toolstring had to pass through a 3.5” restriction.

Application

A wel-lok™ WSO was set inside the 4 ½” slotted liner to isolate the well out to the 6” open-hole.

Outcomes/Conclusion

The WSO was successfully set as planned. No results on water cut or oil production have been reported from the client. This was the first commercial field run of BiSN’s wel-lok technology in Algeria.

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.

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