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Zonal Isolation Plug Application in Azerbaijan May 2018

Stage of Well : WELL INTERVENTION

Identification of problem:

A client needed to shut off a producing zone in order to perforate and produce from a zone higher in the well.

Issues to overcome:

The well was full of base oil and the tool needed to pass through a 3.5” ID stinger assembly before setting inside 5” tubing at an inclination of 75°. This required a tool with a maximum OD of 3.25” to seal inside a 4.276” ID at 75 °C and withstand 2,500 psi differential pressure.

Application

A Wel-lok M2M TS™ EXD tool was set inside the tubing on telecoil.

Outcomes/Conclusion:

This tool was qualified to 5,000 psi at our testing facility in Houston, TX. After being run in the well, it was pressure tested to 2,800 psi, successfully shutting off production from the unwanted zone.

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Suspension Plug Application in UK North Sea November 2017

Stage of Well : WELL INTERVENTION

Identification of problem:

Two V0 rated mechanical plugs had previously been set in this well as suspension plugs but gas continued to leak past them to surface.

Issues to overcome:

The well had 5” tubing that with a kink in it which prevented full drift tools from passing through. This required a tool with a maximum OD of 3.0” to seal inside a 4.276” ID at 130 °C.

Application

A Wel-lok M2M TS™ tool was set inside the tubing above the previously set mechanical plugs.

Outcomes/Conclusion:

This tool was qualified to 7,000 psi at our testing facility in Houston, TX. After being run in the well, it was successfully pressure tested to 1,400 psi in addition to a negative pressure test which confirmed there was no longer a gas leak to surface.

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Well Intervention
Well Intervention

Field Trial Angola December 2016

Stage of Well : WELL INTERVENTION

Identification of problem:

Provide a seal in the production string and annulus to shut off a lower water producing zone. (Read more about annular seals)

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 M2M™ WSO (water shut off tool) was set in both the wells as follows:

Well 1 - Wel-lok M2M™ WSO was set inside of a 5.5” OD screen and sealed inside a 9.5” ID open hole

Well 2 - Wel-lok M2M™ 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.

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BiSN Case Study Mexico
BiSN Case Study Mexico

Field Trial Gulf of Mexico June 2016

Stage of Well : INTERVENTION

Identification of problem:

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

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

When the alloy solidified, it sealed off the well below the tool, preventing the production of water from the lower watered out zone

When the alloy was melted, it flowed through the screen and into the annulus between the screen and the formation wall.

A BiSN Wel-lok M2M WSO™ (Water Shut Off) was set inside the screen between an upper oil producing zone and a lower watered out zone

Outcomes/Conclusion:

Initial water production on the well was in excess of 50%. After setting the BiSN tool, water production was reduced to under 25%.