Etude et évaluation de L’influence de forage en Underbalance (UBD) sur le champ de HMD

Abstract

Underbalance drilling can help maximize profits by preventing circulation loss, improving penetration rates and providing real-time information of reservoir, reducing completion and stimulation costs and improving productivity, reducing formation damage. UBD involves intentionally manipulating the bottom hole circulation pressure (BHCP) to be less than the reservoir pressure (Pr). In Algeria SONATRACH has introduced this technique since 2002 in the field of HMD. PIPESIM2017.2 and SAPHIR software were used for reservoir and well modeling and verification of Flow Tests and build up parameters. Then we proceeded to the economic evaluation. The results obtained confirm the reliability and profitability of UBD