Intervention operational risk report
Reduce well intervention risks
Reliable subsea projects – reduce project schedule risk
A significant challenge for the offshore industry is the potential for schedule overruns on SURF projects leading to project cost increases and delayed first oil. Often this schedule risk is driven by the complexity of the riser and subsea components, as they can only be handled by a very limited number of installation assets which are frequently running at or near the limits of their performance envelope. This makes the whole subsea project process highly sensitive to delays due to poor weather or potentially even small technical issues that arise.
m-pipe® allows a far simpler subsea architecture and reduced weight of individual components, combined with a need for less on-site fabrication and fewer project interfaces. The inherent light weight of m-pipe® means faster deployment using smaller, more readily available and lower cost vessels, minimising project time and the potential for cost escalation. The flexibility of m-pipe® also enables the standardisation of wellhead jumpers and riser base spools, removing the need for metrology and fabrication on the project critical path.
Reduce technical risk
The technical challenges involved in executing large SURF contracts are often underestimated, particularly in deep water where it is common for components to be on the edge of what can be confidently designed and manufactured. This often results in extended design and manufacturing schedules that result in a compression of the schedule for offshore operations.
Examples of this are the design of complex jumper spools, large buoyancy cans or foundation piles, or simply the qualification of material and weld performance for current steel installations. Riser systems designed with m-pipe® permit a simpler overall SURF architecture, and many of the critical components associated with an alternative steel pipe based architecture are much smaller or even eliminated altogether by using m-pipe®.
Overall, the inherent low weight, fatigue performance and flexibility of m-pipe® makes the identification of acceptable, practical and simpler subsea architecture configurations and their subsequent manufacture a much easier and quicker process.
Reduce installation risk
Damage to subsea riser equipment can easily occur during installation, due to human error, the high loads that occur from heavy buoyancy cans associated with steel pipe, vessel motion in poor weather or exposure to handling equipment failures. As a consequence, damage to pipes and other equipment can occur during the installation sequence that can subsequently result in an in-service failure of the riser.
An example of this is the common damage to the outer sheath of a non-bonded flexible pipe, which then allows seawater ingress to the inner steel armour wires. Damage can also occur due to the high tensile loads that are generated as a result of the riser self-weight, plus the limited ability of the installation equipment to accommodate such forces reliably. Similar problems can also occur with riser thermal or corrosion coatings.
With an m-pipe® riser system there are far lower loads. Combined with the robustness of the pipe itself, this reduces the probability of installation damage and subsequent degradation in service. The ability of m-pipe® to accommodate high flexure and fatigue also simplifies the planning of any limiting environmental windows, and the ability to deploy m-pipe® rapidly from a carousel means that installation durations are minimised.
As one major deep water installation contractor commented on using m-pipe®:
“From the moment we leave the dock our use of m-pipe® means we have a far lower risk operation”.
Reduce operation risk
Steel based riser pipe systems, including non bonded flexible pipe, suffer from corrosion damage, even when this is actively managed through coatings and expensive inhibitors. Under deep water, sour service and high pressure and high temperature conditions, incumbent technologies have limitations. Unlike Magma’s m-pipe® solution, existing technologies are often limited due to fatigue failure and corrosion risks. The need to regularly monitor in-service corrosion and fatigue has a major cost impact and, in more extreme and deep water conditions, the need to replace damaged riser systems can result in significant losses in both revenues and capital investment.
Magma m-pipe® provides a safer and significantly lower risk option than existing technologies to address the highly demanding oil and gas environment. m-pipe® is an enabling technology that permits oil and gas operators to meet the new challenges faced in harsh offshore environments, where existing pipe technologies have reached the limit of their capability, reliability and cost effectiveness.
More importantly, Magma’s m-pipe® project costs are more economic overall and, just as importantly, m-pipe® reduces oil and gas project risk in both deployment and ongoing operation.
Reduce deployment risk
There are obviously serious consequences of dropping a riser pipe string onto subsea infrastructure or QHSE from loss of integrity during a high pressure pumping operation. The high strength, corrosion resistance and long fatigue life of m-pipe® removes both the risk of failure from fatigue and corrosion damage and the risk of needing to delay an operation whilst a riser section is being replaced.
Magma m-pipe® can be readily spooled for ease of handling, storage, deployment and retrieval. Additionally, its strength, flexibility and resistance to fatigue and chemical attack make it an ideal product for small diameter (1.7 inch to 4 inch) hydraulic light well intervention and down lines.
Magma has developed a complete IDP Integrated Deployment Package, and the combined light weight of m-pipe® and the IDP system means it can be mobilised readily and safely, using standard dockside or vessel cranes and relatively small lifts. Offshore, the light weight of the m-pipe® and IDP deck package ensures the system is only lightly loaded, even with significant vessel motions, high loop currents or in heavy beam seas. IDP report summary