Marine Riser Suspension Decisions Using a Digital Twin
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Solution Overview
Problem
The recovery of marine risers during typhoons in deepwater operations results in long non-operational production times and risks suspension failure due to violent vibrations, posing challenges in ensuring timely and safe suspension operations under harsh marine environments.
Innovation Solution
A decision-making method and system utilizing a digital twin to optimize the suspension operation of marine riser systems by integrating real-time monitoring data and dynamics simulation models, employing multi-objective optimization algorithms to ensure safe and efficient suspension operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all risers are recovered during typhoon in deepwater operations, then safety is improved, but non-operational production time increases significantly
Solution Approach 1:
The invention segments the riser management strategy by distinguishing between different water depths and typhoon intensities. For deepwater operations, instead of recovering all risers uniformly, the system selectively suspends risers based on real-time environmental conditions and risk assessment, thereby avoiding unnecessary recovery operations and reducing non-operational time while maintaining safety where applicable
Solution Approach 2:
The invention implements a dynamic decision-making system that continuously adjusts riser suspension decisions based on real-time monitoring of environmental conditions (wind speed, wave height, current) and riser state. This dynamic approach allows the system to optimize the balance between safety and operational continuity, suspending risers only when necessary rather than following static recovery protocols
2Loss of time
If riser suspension operation is implemented during typhoon navigation, then operational timeliness is improved, but risk of suspension failure and collision increases due to violent vibration
Solution Approach 1:
The invention performs preliminary risk assessment and simulation before executing suspension operations. The system evaluates environmental conditions, riser configuration, and potential vibrations in advance, and only approves suspension operations when conditions are favorable. This preliminary action prevents high-risk operations that could lead to suspension failure or collision
Solution Approach 2:
The invention implements real-time feedback monitoring during suspension operations, continuously tracking riser vibration, platform position, and environmental conditions. When abnormal vibrations or unsafe conditions are detected, the system provides immediate feedback to adjust or terminate the suspension operation, thereby preventing suspension failure and collision while maintaining operational timeliness
3Reliability
If traditional typhoon coping strategy of recovering all risers is used, then safety is ensured, but drilling and completion operation timeliness is seriously affected
Solution Approach 1:
The invention changes the decision parameters from binary (recover all or suspend all) to continuous variables including environmental thresholds, riser-specific risk profiles, and dynamic condition monitoring. This allows nuanced decisions where some risers can remain suspended under controlled conditions while others are recovered, maintaining safety while minimizing impact on drilling and completion operation timeliness
Data Source
AI summary
Provided is a decision-making method and system for a suspension operation of a marine riser system based on a digital twin, which belongs to the technical field of marine oil and gas development. The decision-making method includes: acquiring original monitoring data by the sensor group to establish a physical entity structure model; acquiring real-time monitoring data to establish a digital twin model of the physical entity structure; and introducing navigation path and speed of the drilling platform, and a configuration and suspension mode of the riser system, combined with the digital twin model of the marine riser coupling system and a limit performance parameter, providing a suspension operation decision-making model of the riser system, and making a real-time accurate suspension operation decision based on a multi-objective optimization algorithm, so as to guarantee a safe and efficient suspension operation of the riser system.