Result
MCGx commissioned a 115 MMscf/d offshore gas well through an extended liquid unload phase where surface response lagged significantly behind downhole events. By interpreting transient behaviour under delayed feedback, the well transitioned to stable gas production without rate exceedances or open-hole gravel pack damage.
Problem
Retained construction fluids displaced slowly, creating a deceptive start-up scenario. Opening the production choke generated minimal surface rate response (making it appear restricted) while downhole, liquid slugs were mobilising toward surface. Continued aggressive choke opening risked suddenly releasing accumulated liquid inventory, spiking production rates well beyond bean-up guidelines and flux limits, threatening catastrophic open-hole gravel pack failure.
MCGx Insight
MCGx recognised that surface rate alone was unreliable during liquid-dominated unload. By monitoring downhole pressure and temperature response independently of surface metering, MCGx tracked liquid movement and anticipated slug arrival timing. Choke progression was deliberately staged with hold points, allowing liquid to clear in controlled increments rather than releasing inventory suddenly.
Proof
The well commissioned to stable production without rate exceedances or completion damage. The staged unload approach was documented and adopted as the reference method for managing delayed surface response, demonstrating capability in conditions not previously encountered.