Objectives

• Approximately 120,000 oil wells across theworld are equipped with electricalsubmersible pumps (ESPs) with significantinvestment by operators to install them –maximising their lift efficiency and extendingtheir operational life is imperative to the ROI

Expro Excellence

• Expro has deployed its clamp-onSonarTest™ surveillance service onhundreds of ESP lifted wells to measure theproduction of the well and the lift efficiencyof the ESP

• Consists of Expro’s PassiveSONAR™ flowmeter, which is clamped onto the wellheadproduction pipework – non-intrusivesolution

• PassiveSONAR flow meter is integratedwith a PVT and multiphase flow engine tocalculate the properties of the producedfluids and the individual flow rates

• Flexible - can be installed either upstreamor downstream of the choke manifold

• Quick installation – requires approximately60 minutes for installation andcommissioning, allowing multi-rate testingof wells in one day

• Easy deployment – only 1 or 2 Expro fieldtechnicians required and as the system islightweight and portable it can be easilytransported to the well site by a smallvehicle or offshore via a single-man liftpackage

Value to client• Clients step through several ESP drive

frequencies during sonar testing to evaluatethe production rate at various set points

• Data provided by Expro ensure correctinstallation of ESPs, monitors anddiagnoses the performance of ESPs tooptimise drive frequency and chokesettings, and to detect the onset ofmechanical failure

• Enables intelligent decision making tomaximise production rates and datainfluences work-over strategies and extendsthe run life of ESPs

ContactFor further information, please visit:

www.exprometers.com/contact

or call +1 (203) 303-5686.

Meters

/ Expro Excellence

Expro’s production surveillance on ESPlifted wells optimises installation andextends the ESP operational life

Meters

Expro Exce l lence exprogroup.com

Key deliverables

• Non-intrusive design

• Accurate, real-timemeasurement

• No process shut down

• Cost-effective

• Flexible

• Quick installation

• Efficient deployment

Most oil wells are not equipped with flow metering as installing traditional multiphase flow meterson each well can be cost prohibitive. Because there is typically no individual wellhead productiondata, ESP wells are monitored using pump parameters and theoretical pump performance curvestypically provided by the ESP supplier. Although useful, theoretical pump curves make certainassumptions with regard to pump efficiency, the mechanical integrity of the pump, and reservoirdeliverability. The most useful tool to measure, analyse and ultimately improve the performance ofthe ESP system is to measure the actual pump flow rate from the well.

Many failures of ESP systems occur at start up for a variety of reasons. Production surveillanceat the wellhead during ESP commissioning can help confirm:

• Successful installation and commissioning of the ESP

• Volumetric flow rates and the production index (PI)

• The ESP is not over-sized for the reservoir (resulting in pump off)

• The ESP is not under-sized for the reservoir and is achieving maximum production

• The ESP operation is efficient on the lift curve (achieving maximum production with minimumelectrical power)

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