AVEVA World Magazine

AVEVA World Magazine 2015 #1

AVEVA World Magazine | Technology insights and customer successes with AVEVA software

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Scanning for opportunities in West Africa How AVEVA PDMS, AVEVA E3D and laser scanning gave Ariosh real competitive advantage in challenging revamp projects As Owner Operators increasingly turn to laser scanning to extend the life of their assets, Nigerian leading EPC contractor, Ariosh has secured a valuable competitive advantage by pioneering laser scanning competence in Nigeria. Supported by AVEVA PDMS™, and now AVEVA Everything3D™ (AVEVA E3D™), Ariosh can generate accurate as-built 3D models and drawings, perform virtual installations and generate job cards. This capability has helped them to deliver several brownfield projects with the accuracy needed to achieve right-first-time installation. Their most recent success was the laser scanning of several platforms in Nigeria, after a major international OO had been forced to halt modification work due to unforeseen design clashes. Recovering flare gas In 2012 Ariosh was awarded the contract to provide follow-on engineering services during a revamp of the OO's seven offshore platforms. Production needed to be stepped up in order to provide approximately 300 million cubic feet per day of natural gas feedstock for a refinery which will convert natural gas currently being flared into high-value, clean transportation fuels. Serious problems The challenges of executing brownfield projects became apparent following the completion of detailed engineering and fabrication drawings by an international EPC. The OO experienced significant clashes during installation of the first modifications on the first platform. They suspended work on the first platform and proceeded to the next one, only to encounter the same problems. Worried that history would repeat itself with the remaining five platforms, the upgrade programme was put on hold. Ariosh was contracted to help recover the situation. Heavy cost impact The problems needed to be resolved quickly to avoid the serious impact of increased costs, schedule delays and lost production, as well as safety and reliability concerns. The direct costs alone were heavy; the barge used for installation cost over 100,000 USD per day. Modification work during installation offshore can take at least twice as long as modifications in the fabrication yard. Solving the problems Ariosh started by laser scanning all seven platforms and then modelling the new design, using AVEVA PDMS for the first two and AVEVA E3D for the remainder. These 3D models were superimposed on the laser data and clash checked using the built-in clash management capabilities. Design verification, completion of fabrication and fabrication assurance, and installation on the first three platforms was completed in only 18 months. Design verification should obviously be performed prior to fabrication. However, on this project, fabrication of the spools and structures had progressed to over 70% before Ariosh's involvement. These spools and structures were then scanned in the fabrication yard to allow Ariosh to conduct virtual installations of the as-fabricated spools to make recommendations for correcting installation issues in advance. Rework was also minimised. (continues) AVEVA World Magazine 2015 | Issue 1 p14

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