Schlumberger

Tech Report: GN4 Flowback Feature
Enables Fast Detection of Abnormal Mud Volume Return

Decision-ready information detects unwanted wellbore event and reduces NPT

GN4 Flowback Feature Enables Fast Detection of Abnormal Mud Volume Return

Publication Date: 10/16/2014

During a drilling program, Geoservices experts used the advanced flowback feature of the latest GN4 data acquisition system to compare different flowbacks in real time, enabling them to quickly determine if an unwanted wellbore event had occurred. The influx was suspected only three minutes after shutoff (10-bbl increase), and confirmation was received after five minutes (20-bbl increase).




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