Expro ActiveSONAR™ confirms success of well remediation programme

• An operator of a Normally Unmanned Installation (NUI) facility in the Southern North Sea, had no individual well monitoring in place
• The customer had invested in a conventional ultrasonic clamp-on meter for export line testing by difference.  This conventional ultrasonic clamp-on meter had failed to provide measurement
• The customer was planning well remediation intervention with a perforating programme to increase production
• Existing lower completion limited the thru bore access, the size of perforating guns and potential effectiveness of the remediation

• Expro ActiveSONAR™ flow meter was the proposed solution to perform testing on each individual well and determine the differential pre and post perforation
• The project was performed as a two-stage surveillance operation on the export production header and on each of the four production wells
• The ActiveSONAR flow meter was installed on the production header downstream of the existing ultrasonic clamp-on flow meter.  Although this was a less desirable pipe position, Expro successfully collected data
• The ActiveSONAR flow meter unique diagnostics capabilities, identified wetness in the process gas

• The customer was able to define and qualify the results of its perforation intervention
• Comparing the flow rate pre and post perforation provided the customer with the confidence of individual well perforation success
• The customer realised an average 40% improvement in peak production on wells that responded to remediation
• This solution eliminated the need and cost of running a production logging tool on each well
• Non-intrusive installation and small footprint, compact design
• The customer received a cost-effective solution previously seen as a cost-prohibitive application

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