Solution Overview
The Sigmafine Extension for LNG (liquefied natural gas), LPG (liquefied petroleum gases and NGL (natural gas liquids) enables the transformation of inventory and custody transfer information from actual conditions to standard conditions using the appropriate volume correction factors specified by international standards and best practices. This Extension implements accurate temperature and pressure corrections for LNG, LPG and NGL mixtures.
With this Extension, there is no need to create and maintain complex Excel spreadsheets or to use standalone engineering tools since all logic and computation is performed within the Sigmafine model. A combination of equations of state and correlations used by this extension addresses the reporting and monitoring needs for liquified gases in the oil and gas industry.
This Sigmafine App enables the creation of real time inventory reports using the same standard across the company, facilitating benchmarking between sites. Engineers and plant managers have now actionable inventory information and material transfer information. This results in better tracking on inventory and transfers in real time, regardless of changes of operating conditions, enabling optimized planning and scheduling.
Solution Approach
The Sigmafine Apps for LNG, LPG and NGL installs as a Data Reference in the OSIsoft PI System Asset Framework (AF) and can be configured to handle calculations based on input tags coming from the PI system.