News
Pioneer Natural Resources Inc uses Omnisens-DITEST for flow assurance on a 6 miles subsea arctic pipeline in Oooguruk Oil Field,
Omnisens DITEST-LTM monitoring system successfully used to perform sub-sea pipeline temperature monitoring and flow assurance in the Oooguruk oil Field offshore in Alaska
Offshore arctic conditions pose unique design challenges to the safe operation of sub-sea pipelines exposed to seabed ice gouging, permafrost thaw settlement, strudel scour, and channel migration. The application of fiber optic-based distributed temperature monitoring systems has demonstrated the ability to monitor the pipeline operational conditions and to achieve efficient flow assurance monitoring. As visual inspection is impossible, real-time temperature monitoring via optical fibers along the pipeline route can provide an early warning of the development of erosional events, pipeline insulation damages, seabed soil modifications… It allows the operator to take timely and appropriate actions to ensure the integrity of the pipeline. The Omnisens DITEST-LTM monitoring system has successfully been used to monitor a 13.5 km pipeline bundle prior to start-up in late 2007 and during operation since then. The pipeline installation is part of Pioneer Natural Resources Inc. developments in the Oooguruk Oil Field in Alaska’s Beaufort Sea. 8km of buried sub-sea flow lines transport the produced fluids from an offshore gravel island/drill site to an onshore above ground pipeline which runs to an existing pipeline used by another operator. The 10 km sub-sea pipeline section is continuously monitored with fiber optic communication cables installed within the buried bundle. The Omnisens DITEST-LTM monitoring system was selected for its high monitoring performance over long distances with ability to detect temperature events occurring over just one meter. The system has been able to map seabed temperature profiles along the pipeline route and to accurately track temperature excursions as they were occurring with field verified data prior and during pipeline operation start-up. The Omnisens long range, laser-based DITEST monitoring systems are the most advanced fiber optic distributed temperature monitoring system. The measuring technique is based on Stimulated Brillouin scattering in singlemode optical fibers and offers significant advantages over conventional DTS systems in terms of monitoring distances, optical budget and spatial resolution. Please contact us for more information
flow assurance, subsea pipeline, pipeline integrity, subsea structures integrity