Abstract

Badra oilfield started production in 2014.

After some time from the beginning of the field operation, several troubles manifested itself.

Analysis of tubing performance detected clear indication of gas slippage effect on low rate wells and tubing choking effect on high rate wells. Several issues with well integrity also lead to re-assessment of completion design.

During selection of new tubing size and completion equipment, factors like production rate, reservoir depletion, GOR, Flowing buttonhole pressure, wellhead pressure and temperature were taken into account.

In addition to that, possible well interventions and expected tubing loads were considered.

As a result three groups of wells have been identified - low, high and medium production rates in terms of Badra field with new completion concept for each group.

New completion design was selected and implemented on several wells and showed its better performance for new production conditions.

Moreover, selected production tubing diameter and completion components has lower cost and allows any well interventions that might be planned on the field. In addition to that, new completion string can last longer due to its higher corrosion allowance.

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