The subsea environment is one of the most challenging places to operate critical infrastructure. Pipelines, risers, wellheads and production facilities face constant stress from ocean currents, temperature fluctuations, operational pressures and even tectonic movement.
But how do you know when something is going wrong – before it becomes a costly or dangerous problem?
Subsea integrity monitoring is the continuous or periodic measurement and analysis of your underwater infrastructure to detect potential failures before they occur. It’s about understanding the structural health and performance of your assets in real-time.
How does it work?
Think of it as a health check for your subsea infrastructure. Are your pipelines experiencing fatigue from vibration? Is your wellhead moving due to drilling operations? Are there any leaks developing in your production infrastructure? Subsea integrity monitoring gives you the answers.
The key is detecting changes that indicate potential integrity breaches – whether that’s structural movement, high-frequency vibration causing fatigue or hydrocarbon leaks into the water column.
Effective subsea integrity monitoring involves three critical elements:
- First, accurate measurement. You need sensors that can precisely detect what’s happening underwater – movement in millimetres, vibrations at high frequencies, or the acoustic signature of a leak.
- Second, reliable data transmission. Getting that data from the seabed to shore is essential. Acoustic communications allow data to travel through water without the need for expensive umbilicals or frequent ROV visits.
- Third, intelligent analysis. The data must be processed, visualised and interpreted by specialists who can tell you what it means for your operations and what actions you should take.
Monitoring integrity or assets – what’s the difference?
Now, you might be wondering – what’s the difference between subsea integrity monitoring and subsea asset monitoring? It’s a great question, and the distinction matters.
Subsea integrity monitoring is specifically focused on detecting threats to structural integrity – fatigue, movement, deformation and leaks that could lead to failure. It’s diagnostic and predictive. The goal is to prevent catastrophic events by understanding stress, strain, and potential breach points.
Subsea asset monitoring is a broader term which encompasses integrity monitoring but also includes positioning, tracking, environmental measurements and operational status. For example; monitoring the location of a pipeline during installation, tracking an ROV during inspection or measuring ocean currents around your infrastructure all fall under asset monitoring.
Think of it this way: all integrity monitoring is asset monitoring, but not all asset monitoring is integrity monitoring. Integrity monitoring is specifically concerned with ensuring structural health and failure prevention.
Why use Observer?
Our Observer integrity monitoring transponder is designed to be your go-to integrity monitoring tool. Capable of monitoring both high and low frequency vibrations for detecting fatigue on risers, spool pieces and free spans, as well as pipeline creeping, buckling and seabed settlement.
These intelligent transponders measure, log and process acceleration and angular motion at source. They then acoustically transmit data, which can be processed onboard, through the water using integrated acoustic modems. The ability to process data onboard removes added time and complexity in post-processing data before a decision can be made. You get the answers you need, straight away.
Observer’s long battery life and the ability to interface with external sensors brings unprecedented flexibility to vibration monitoring. It’s designed for real world operations, ROV deployable and compatible with autonomous systems like AUVs and USVs for remote data harvesting capabilities.
From the North Sea to the Gulf of Mexico, from deepwater oil and gas to offshore carbon capture sites, our integrity monitoring solutions are protecting critical infrastructure around the world.
For more information about Observer and how it can aid your subsea monitoring operations click here.