Schlumberger

The New Dynamics of Underbalanced Perforating (Chinese)

Underbalanced Perforating
Publication: Oilfield Review
Volume: 15
Issue: 4
Publication Date: 12/01/2003

Most wells with cemented casing rely on a static pressure differential to mitigate perforating damage. However, recent research indicates that the primary damage-removal mechanism is actually a rapid drop in transient pressure, or dynamic underbalance, immediately after gun detonation. This article discusses completion designs based on this innovative concept. Field results demonstrate substantial improvement in both production and injection performance.