公开(公告)号：US20210180418A1

公开(公告)日：2021-06-17

申请号：US16711739

申请日：2019-12-12

申请人： HALLIBURTON ENERGY SERVICES, INC.

发明人： Zhijie SUN ,  Rui REN ,  Robert P. DARBE ,  Mathew Dennis ROWE

IPC分类号： E21B21/08 ,  E21B47/00 ,  E21B44/00

摘要： Certain aspects and features relate to a system that monitors for kick and lost circulation in the riser string of an offshore drilling rig. The system compensates for annulus outflow fluctuation induced by wave (heave) motion in order to reduce false alarms, resulting in fewer drilling operation disruptions. The system includes a sensor or sensors disposable with respect to a drilling rig subject to rig motion. A processor receives a real-time position signal indicative of the rig motion from the sensor and applies a state observer to the position signal to determine annular flow parameters. The system models an annular flow for the wellbore to produce a modeled flow signal that reflects a position of the drilling rig relative to influx flow. The system uses the modeled flow to determine kick-loss-alarm parameters that take into account the heave motion.