Risk Evaluation for Gas Migration Control

GasMigrationAdvisor software is designed to evaluate the risk severity of gas migration based on the pressure decay limit (measurement of how far the cement slurry setting process will advance before hydrostatic pressure decreases below reservoir pressure, allowing gas to migrate into the annulus). GasMigrationAdvisor software offers two modes: simple, using only fluid placement and reservoir pore pressure, and detailed, using data from CemCADE cementing design and evaluation software.

When multiple gas zones are being evaluated, the software automatically defines global severity risk based on the zone with the highest risk level.

Once the risk is assigned, Schlumberger engineers make risk reduction recommendations: placement process design, pumping schedules, and the appropriate slurry and additives.