Field Trial Angola December 2016
Well Intervention with Wel-lok™ WSO
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
1: 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.
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
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.