Getting the well ready for intervention

An operator drilled and completed a well in early 2010. It is a horizontal cased hole producer in the Middle East, with a total measured depth of over 13,000 ft.

There are two zones of interest—a bottom zone that is 70 ft long and an upper zone that is 80 ft long—that need to be accurately perforated. These zones are 280 ft apart. The solution requires running a wellbore cleanout and drift to ensure that there is no debris left in the completion, followed by setting the well on an underbalanced condition for a smooth perforating operation. An accurate perforating gun placement will be required for the underbalanced perforating technique.

Based on the results of the flowback, an additional production log run may be considered to optimize the well's production.

Using real-time gamma ray for accurate gun placement

Operators typically approach a horizontal well perforation using memory logging tools or a wired CT unit, which means that a mobilization of a CT unit and an electric wireline unit is required. Also, a simulation of the CT movement in the well is a critical factor to ensure that the BHA can be deployed all the way to the targeted zones.

The choice requires precise knowledge of the perforating gun placement and an equally precise pressure reading for creating the underbalanced condition.

Looking for an efficient and effective solution, the operator elected to use the Schlumberger ACTive, eFire-CT, eFire-TCP, and CIRP to efficiently and accurately perforate the well.