Expro Reports 'World First' CaTS App

Leading international oilfield service company Expro International Group PLC ("Expro Group" or "Expro") reported a "world first" successful application of its award-winning Cableless Telemetry System (CaTS) for the monitoring of the reservoir pressure and temperature response in an abandoned subsea well. The CaTSTM technology was successfully applied in the Clair Ridge appraisal well 206/8-T, operated by BP Exploration Ltd in the UK North Sea.

CaTS is a revolutionary development in the field of reservoir monitoring and control that allows real-time information to be transmitted to and from downhole without the use of cabling or wireline in the well. Its two-way transmission capability enables the remote control of downhole instrumentation, opening the path to the radical redesign of downhole completions.

The CaTSTM system was installed in the 206/8-T well in early June 2006 as part of the final abandonment process. CaTSTM transmits its data from the reservoir to the seabed using Expro╣s market leading wireless telemetry technology. The data is collected, processed and stored at the seabed using a specially developed CaTSTM subsea receiver. The data is transmitted from the receiver, on demand, to a supply vessel located overhead the abandoned well. A first data interrogation visit took place in early July and post abandonment reservoir pressure and temperature data was successfully uploaded for analysis by the reservoir engineers. Further data interrogation visits are planned for later in the year.

By using CaTS in this application, it is possible to monitor the long-term reservoir pressure build-up subsequent to the production tests performed during the Drill Stem Test and also to monitor for any interference effects resulting from production or injection activity on the Clair platform located nearby. This information will assist BP in gaining a better understanding of the overall structure of the Clair reservoir.

Wireless Well Solutions general manager Brian Champion said: "This application of CaTS is of particular interest to those operators involved in the exploration and appraisal (E&A) stages of new field evaluation, where the value of gaining a better understanding of reservoir connectivity cannot be overstated. Our cableless technology enables an E&A well to deliver high value reservoir data beyond abandonment, which offers significant technical and commercial benefits to the operator."

Expro International Group PLC ("Expro Group" or "Expro") is a leading upstream oil and gas technology and service provider, specializing in flow management, well performance and production optimization. The Expro Group employs over 4,000 people worldwide and is an innovative leader in oilfield technology, which enables clients to maximize recovery of their reserves.

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