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KOC restores oil production to 800 bbl/d using digital-slickline-conveyed straddle system

Leak detection tool and SIM sealing system identify and isolate tubing leak to prevent costly rig workover.

Kuwait Oil Company (KOC) needed to determine the depth of and isolate a tubing leak to restore oil production in a well with an ESP completion. Peak Well Systems, a Schlumberger company, conveyed on digital slickline its leak detection tool and SIM sealing integrity management system to accurately detect and isolate the leak, avoiding a workover and returning production to 800 bbl/d with minimal economic impact.

ESP production challenges

Wells with ESP completions can be prone to tubing integrity issues. Fluid recirculation within the tubing can stop well production, and often a rig workover is then required to replace damaged tubing or leaks. This can result in well shutdown for at least 60 days, deferring production and increasing costs.

What Schlumberger recommended

A digital-slickline-conveyed straddle system—including Peak Well Systems’ leak detection tool and SIM system retrievable bridge plugs and straddle tubes—was used to accurately detect the depth of the leak and provide reliable zonal isolation.

How the straddle system restored production

The leak detection tool was deployed downhole using digital slickline to deliver downhole measurements to the surface in real time. The digital inline flowmeter accurately identified the leak within a 9-ft interval.

The Schlumberger team then ran 40 ft of stackable SIM system straddle tubes downhole between a lower and upper SIM system retrievable bridge plug to isolate the leakage and enable the well to resume production through the straddle, bypassing the leakage point.

Digital slickline accurately deployed the straddle system in five runs. After successful deployment, the ESP was started and wellhead pressure increased, immediately indicating that the leakage point had been isolated.

A GOR test showed the well producing oil at 800 bbl/d. Because of this unique intervention, KOC saved millions of dollars in deferred production as well as the costs associated with deploying a workover rig.


Product Code: 354