AD250 – Case Study 1

CASE STUDY 1 - AD250 WIRELESS

PCP WIRELESS DOWNHOLE GAUGE TRIALS

CLIENT

Australian O&G Operator

WELL TYPE

Coal Seam Gas – PCP Artificial Lift System

TECHNOLOGY SOLUTION

AD250 Wireless Downhole Gauge System

CHALLENGE

Two AD250 Wireless Downhole Gauge Systems were installed in Australian CSG wells to measure real-time wellbore data at hourly intervals over a 10-month period.

OUTCOME

Two ‘C’ cell lithium batteries powered each downhole gauge, and the units operated without fault for their entire 10-month deployment as summarized in the table below. The hourly data transmission rate captured early well start-up parameters. The number of packets sent equates to 5-years of operation at 4 data transmissions per day, which is the rate we recommend for long-term production monitoring.

WELLDAYS SERVICEACOUSTIC PACKETS
CSG-1311SENT 7560
CSG-2315SENT 7560

SOLUTION

The frequency of data acquisition allowed the operator to accurately monitor the ‘real’ dynamic fluid head over the PCP during the dewatering phase. The graph below compares the actual wellbore pressure with the ‘scattered’ wellbore pressures estimated by echometer shots.

The AD250 Wireless System is ideal to integrate with PCP pump off control systems.

After dewatering, the client was able to routinely perform and monitor wellbore pressure buildups in real time.

These wells are good examples of how relatively low data rates can deliver excellent data for engineering analysis.

WELLBORE PRESSURE DURING DEWATERING

PBU & DERIVATIVE PLOT


 
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