SIS and fire and gas systems in Algeria

Invensys is to supply Triconex safety instrumented systems and fire and gas systems for SonaHess at the Gassi El Agreb oil field redevelopment project in Algeria

Invensys is to supply Triconex safety instrumented systems and fire and gas systems for SonaHess at the Gassi El Agreb oil field redevelopment project in Algeria.

Triple modular redundant (TMR) technology to be used for emergency shutdown in four gas compression and re-injection facilities.

Invensys Process Systems has been selected by Bechtel to supply Triconex triple modular redundant technology for safety instrumented systems in the SonaHess Gassi El Agreb (GEA) redevelopment project in Algeria.

Bechtel has the engineering, procurement and construction (EPC) contract to construct the facilities for SonaHess.

The Tricon TMR systems will be implemented for emergency shutdown and fire and gas applications at the El Gassi, Zotti, Al Agreb and Al Agreb West gas compression and re-injection lift facilities.

Invensys will also provide project management, hardware integration, testing, and training services for SonaHess engineers and operators.

SonaHess is a joint operating company of Sonatrach and Amerada Hess.

The GEA redevelopment project will enhance oil recovery from mature oilfields, to address continued growth in global crude oil demands.

Oilfield rehabilitation methods include the installation of new gas re-injection lift systems, which compress gas that has been separated from the pumped crude, and re-inject the gas back down into the reservoir, increasing reservoir pressure and driving crude oil to the production wells.

The redevelopment project is expected to be completed in 2007.

The Tricon systems were selected based on.

* the TMR architecture high availability and reliability.

* the extensive installed base of Tricon safety instrumented system installations in other gas injection and LNG applications,.

* the Invensys local support infrastructure.

The Triconex triple modular redundant (TMR) technology employs three isolated, parallel control systems and extensive diagnostics integrated into one system.

The system uses two-out-of-three voting to provide high-integrity, error-free, uninterrupted process operation.

The TMR architecture eliminates any single point of failure and enables on-line maintenance, on-line programming downloads, self-calibration and fault localisation.

The industry-certified Tricon TMR controller control functions and diagnostics are embedded and transparent, and the device behaves as a single control device to the operator or engineer.

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