The Dukhan field is located onshore Qatar and is some 70 km long and 10 km wide. The field contains some 600 oil and gas production wells and 190 water injection wells.

The project objective was to install a wireless SCADA system to monitor the pressure and flow into the 190 Water Injection wells to facilitate real-time remote monitoring and historical data storage to achieve better reservoir management. In addition to delivering data to the Field Stations and main Control Room, the project provided Reservoir and Production engineers in the remote corporate office with real-time and historical data direct to their desktop PCs.

The existing Dukhan field infrastructure included 12 field stations that were linked to a central control room via a fiber optic ring network. The existing well infrastructure included turbine flow meters and flow analysers with local readouts that had to be read manually at regular intervals.

The solution was to install wireless pressure and flow monitoring instruments on each well along with a wireless, solar powered RTU (Zencus Field Transceiver) to transmit the data back to the nearest Field Station where local visualization terminals were installed.

The field stations were linked by the fiber optic network to a central fileserver and data historian. A link to the Qatar Petroleum (QP) corporate intranet provided real-time data access and visualization from any authorized PC on the QP intranet; thus delivering the real-time and historical data to the engineer's desktop.

• Low-cost, fully wireless wellhead infrastructure with no need for power or signal cables.
• Instrumentation of 190 remote wells with real-time Pressure and Flow transmitters with data sampling and transmission every 30 seconds.
• Long distance data transmission from well locations using 2.4 GHz spread spectrum radio modems with links designed for 99.99% availability.
• Local visualization at 12 Field Stations and the central Control Room with alarm and diagnostic functions.
• Utilization of the existing fiber optic communication infrastructure between Field Stations and central fileserver location.
• Installation of a Data Historian and Web-based Data Visualization software to allow real-time and historical data visualization from authorized PCs throughout the QP intranet.
• Reporting of comprehensive field equipment diagnostic data.
• Web-based alarm and diagnostic module.
• All data transmission was encrypted and access was password protected.

The Zencus scope of work included:

• Site Survey and preparation of Design Basis Memorandum.
• Detailed engineering design, including;
• Civil - design specification.
• Instrumentation design.
• Electrical design.
• Telecommunications design.
• Radio Link design.
• Equipment manufacture and supply - SCADA and IT Equipment.
• Supply of all software and firmware including; Communication Software/Firmware, Data Historian, Web Server, SCADA system software and Alarm Module.
• Factory Acceptance Testing (FAT).
• Construction supervision.
• Commissioning.
• Client training.

• Zencus Wireless Pressure Transmitters direct mounted on existing gauge connections.
• Zencus Wireless Flow Transmitters - connected to existing Turbine Meter and Flow Analyser installations.
• Pole mounted Field Transceiver (wireless RTU) with CPU, data logger and integral 2.4 GHz radio modem.
• Solar power pack.