FOSA Case Studies & Papers
Fiber optic sensing examples and technical papers.
Pipelines crossing mountains are often more at risk from the weather and geohazards than from corrosion or third party damage. Two major pipelines in Peru are constantly at risk from geohazards. As operator, Compañía Operadora de Gas del Amazonas (COGA) is responsible for the integrity management of the 730 km natural gas (NG) pipeline, running from the upstream facilities at Malvinas to Lurín (south of Lima) and a parallel 560 km natural gas liquid (NGL) pipeline, on behalf of the owners, Transportadora de Gas del Perú (TgP). The route is particularly challenging, with steep slopes and heavy rains causing soil movement. Between 2004 and 2006 the NGL pipeline experienced four ruptures. Three were due, at least in part, to soil instability, so COGA embarked on an integrity management program
combining established practices with new technologies to address, in particular, threats triggered by the environment. Two particular sections of the pipeline right-of-way, situated in a remote and inaccessible area, were giving particular concern. To monitor these two critical pipeline sections, COGA installed Omnisens fiber optic ground movement monitoring. The advantages of this system were immediately apparent: it monitors strain and temperature all along the required lengths, continuously and automatically, identifying and locating soil movement events. It is ideal when the efficacy of other techniques is limited by weather conditions.