Monitas Group | phase 4
Running
The Monitas Group aims to further develop the added value of advisory monitoring systems for integrity management by in-depth analysis of measurements, exchange experience, provides software updates, support and training. Read here about Monitas Group Phase 4.
background
From the very beginning of offshore exploration it has been well-known that permanently moored offshore installations are continuously exposed to sea actions. Despite this knowledge many FPSOs are still suffering from fatigue damage. These failures often come as a surprise to operators because there are no hull integrity monitoring systems installed. In addition, industry records show that many structural monitoring projects have floundered because they did not provide effective data processing and interpretation tools. The Monitas Joint Industry Project has changed this situation. Within this project, an Advisory Hull Monitoring System (AHMS) has been developed and successfully implemented and tested for two FPSOs.
ADVISORY HULL MONITORING SYSTEMS
An Advisory Hull Monitoring System (AHMS) is an advanced hull monitoring system which includes software named OCTOPUS-Monitas. This software shows, explains and advises on fatigue integrity of FPSOs. It explains reasons for potential deviation of the actual fatigue consumption from design predictions and translates the monitoring data into operational guidance and advice in an easily understandable format. As a consequence it also provides the designers with feedback on the quality of their design tools. A forecast module with confidence bounds for future fatigue accumulation is included in the software.
MONITAS JIP
The methodology and specifications for AHMS were developed within the Monitas JIP which started in 2006 and was completed in 2013. The JIP is supported by 18 participants including the major oil companies and Class Societies. Within the JIP the system was installed and successfully validated for both the Glas Dowr FPSO (Bluewater Energy Services) and the USAN FPSO (TOTAL).
MONITAS GROUP
The efforts of the first three phases of the Monitas Group have resulted in better understanding of hydromechanic and operational loads on floating production units. The analysis included an evaluation of the structural response to wave loads and the influence of loading induced fatigue accumulation. Also, further improvements to the measurement system have been developed by using hindcast data as a supplementary source of wave data. The key points of phase 4 are:
Over the course of this project, additional items may be identified and further research in these topics can be executed.
ORGANISATION
MARIN will continue their role as organizer and administrator of the Monitas Group. All members will receive regular communications on news, developments and software updates and are invited to Monitas Group meetings which are normally held twice a year. The meetings will be used to define the scope of work for the coming years, to presents and discuss the results, to share experiences and to provide support and or training. Operators, engineering companies, class societies, research institutes and other stakeholders that have not been a member of the Monitas JIP can become a member of the Monitas Group and receive all results of the Monitas JIP with the exceptions of the OCTOPUS-Monitas licenses.
BENEFITS
The main benefits expected from the Advisory Hull Monitoring System are:
An Advisory Hull Monitoring System (AHMS) is an advanced hull monitoring system which includes software named OCTOPUS-Monitas. This software shows, explains and advises on fatigue integrity of FPSOs. It explains reasons for potential deviation of the actual fatigue consumption from design predictions and translates the monitoring data into operational guidance and advice in an easily understandable format. As a consequence it also provides the designers with feedback on the quality of their design tools. A forecast module with confidence bounds for future fatigue accumulation is included in the software.
MONITAS JIP
The methodology and specifications for AHMS were developed within the Monitas JIP which started in 2006 and was completed in 2013. The JIP is supported by 18 participants including the major oil companies and Class Societies. Within the JIP the system was installed and successfully validated for both the Glas Dowr FPSO (Bluewater Energy Services) and the USAN FPSO (TOTAL).
MONITAS GROUP
The efforts of the first three phases of the Monitas Group have resulted in better understanding of hydromechanic and operational loads on floating production units. The analysis included an evaluation of the structural response to wave loads and the influence of loading induced fatigue accumulation. Also, further improvements to the measurement system have been developed by using hindcast data as a supplementary source of wave data. The key points of phase 4 are:
- Continue data evaluation of all instrumented units and start evaluation of new units including P78 and P79, to increase knowledge on fatigue accumulation on a wide variety of fields and further close the feedback-loop between operation and design,
- Couple direct measurements and structural models through methods such as the conversion matrix approach to obtain fatigue assessments in locations where no sensors are installed.
Over the course of this project, additional items may be identified and further research in these topics can be executed.
ORGANISATION
MARIN will continue their role as organizer and administrator of the Monitas Group. All members will receive regular communications on news, developments and software updates and are invited to Monitas Group meetings which are normally held twice a year. The meetings will be used to define the scope of work for the coming years, to presents and discuss the results, to share experiences and to provide support and or training. Operators, engineering companies, class societies, research institutes and other stakeholders that have not been a member of the Monitas JIP can become a member of the Monitas Group and receive all results of the Monitas JIP with the exceptions of the OCTOPUS-Monitas licenses.
BENEFITS
The main benefits expected from the Advisory Hull Monitoring System are:
- Prevention of unexpected failures resulting in loss of production
- Rational Inspection, Maintenance & Repair (IMR)
- Improved design of future units
- Rational life-time extension
- “Black Box” function (post-event analysis)
- Advice on operation
Contact
Pieter Aalberts
Senior Project Manager
Download
Leaflet Monitas Group
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