Abstract
This document gives a brief technical description of the mechanical pumping system and important technical definitions, then it summarizes a workflow developed to achieve a cost-effective method for reactivating low potential wells (under 150 oil bbl./day) in a mature field.
The workflow includes the decision process to either reactivate the well rigless or with a workover rig. It also includes the ben-efits of using a compact, easy-to install and operate surface unit.
The challenges encountered in the field include depths exceeding 9,000 ft true vertical depth (TVD), over 9,500 ft measure depth, temperature surpassing 230°F, high tortuosity and oil API between 11° to 32° API.
With an implementation in eight units, we achieved 106,000 oil bbl. during the pilot test, and a cost reduction of between 40 and 55% and other benefits, such as interventions in neighboring wells and reduced installation times.
Finally, the results in terms of benefits, lessons learned and best practices for reactivation with these compact units are shown.
