Project integrated LNG offloading availability assessment for FLNG
Holger Kelle A , Mikhail Santosa A and Anne Barthelemy AINTECSEA Pty Ltd.
The APPEA Journal 54(2) 542-542 https://doi.org/10.1071/AJ13115
Published: 2014
Abstract
This extended abstract explains a combined heuristic, analytical and probabilistic process to evaluate LNG offshore offloading availability in combination with facility uptime and commercial drivers such as LNG sales/supply contracts. The heuristic assessment is informed by facility operators’, LNGC masters’ and tug operators’ experiences in offshore offloading and berthing operations. The analytical process includes assessment of met-ocean, mooring, manoeuvrability simulation, model testing and event forecasting methods. Gaps about uncertainties for future predictions are filled by probabilistic Monte-Carlo simulations. The heuristic, analytical and probabilistic approach, combined with commercial drivers, is put together into uptime assessment to forecast the techno-commercial performance of the facility. The uptime assessment enables:
confidence on achievable LNG throughput, the best for facility configuration and size, the best for facility location and facility’s operational expenditures;
contractual viability—for LNG supplier and gas off-taker; and,
key to terminal performance guarantee to gas off-takers. This process has been developed within INTECSEA during the past six years and has been applied to more than 15 LNG offshore offloading facilities at varying geographical locations.
This extended abstract explores the key drivers and describes the effect on those key drivers due to varying location, varying technology or LNG sales/supply contracting strategy. The key drivers include: achievable LNG throughput, uptime, downtime, demurrage, cargo cancellation, facility downturn and partial LNG offloading. The process described is specific to side-by-side offloading operations; however, it can also be adapted to standard jetty offloading operations and tandem offloading operations.
Holger Kelle is the Vice President Floating Systems for INTECSEA WorleyParsons Group in Melbourne. He has over 18 years’ experience spanning the oil and gas and traditional shipbuilding industry. In particular he has been the lead advisor on various FSRU and FLNG projects and has undertaken techno-commercial assessments on over 4 floating LNG Projects and 23 floating storage regasification projects. He is a trained Naval Architect and Ocean Engineer, and is an industry leader in the assessment of LNG offloading offshore and conducted/supervised model test, new technology qualification, offshore berthing analysis and multi-body hydrodynamic interaction modelling. He has performed due diligence assessments of LNG import terminals and has advised and negotiated terminal user agreements. |
Mikhail Santosa is a Bachelor of Engineering (mechanical) with First Class Honours and a Master of Business (banking and finance) from Monash University. Mikhail is employed as a floating system engineer in the floating production systems group of INTECSEA in Melbourne. Mikhail has worked in oil and gas industry for more than five years. Mikhail’s main areas of experience are: concept selection/uptime assessment/financial modeling of offshore LNG terminal, VIV analysis, reliability analysis and offshore installation analysis. |
Anne Barthelemy is a Senior Naval Architect with over 10 years’ experience working for the offshore oil and gas sector. Anne has a Master’s in Engineering from ESIM (Ecole Superieur d’Ingenieur de Marseille), France. Anne’s main areas of experience relate to the hydrodynamic loading and response of floating offshore structures, as well as mooring designs or analyses. Since Anne joined INTECSEA in Melbourne in 2012 she is mainly involved in hydrodynamic and mooring assessment for the design of conventional and floating LNG terminals. |
