Elevating LDAR: A New Aerial Perspective on Methane Detection

Leak Detection and Repair (LDAR) programs are evolving — not just in response to new regulations, but because operators are looking for smarter, more scalable ways to manage emissions across increasingly complex asset portfolios.

Optical Gas Imaging (OGI) is one of the most established tools in the field today. It’s trusted by technicians, integrated into workflows, and valued for its speed and sensitivity. It’s a cornerstone of many LDAR programs — not because it’s flashy, but because it works.

At the same time, the LDAR toolkit is expanding. From satellites and continuous monitors to drones and AI-enabled analytics, there’s no shortage of new technology entering the conversation. And rightly so — methane mitigation isn’t a one-size-fits-all challenge.

Aerial OGI fits into this broader mosaic. By deploying known, proven camera systems from helicopters, operators can extend their coverage across large or remote sites without introducing unfamiliar technology or disrupting existing inspection protocols.

The infrared imagery doesn’t just tell you a leak exists — it shows you exactly where it’s coming from. This allows operators to triage and dispatch ground teams more effectively with the information they need to go directly to the source. No guesswork. No blind troubleshooting. That makes follow-up faster, safer, and far more efficient.

Beyond methane detection, aerial OGI also enhances safety. While flying at low altitudes (typically 100-200 feet), helicopters can conduct real-time visual inspections of sites, identifying emissions and potential safety hazards. This ability to spot problems beyond emissions and help prevent accidents is a critical addition that aerial OGI brings to the LDAR toolkit.

The path forward in LDAR isn’t binary — it’s layered. Aerial OGI offers a practical, field-ready layer to help bridge coverage gaps, speed up response, and meet evolving expectations for emissions monitoring — all while enhancing safety and providing eyes in the sky.

The Technology Behind Aerial OGI

Aerial OGI systems utilize high-resolution infrared cameras to detect methane and other gases. These systems are mounted on helicopters, providing an efficient and scalable way to monitor large areas without the limitations of ground-based inspections.

The technology behind aerial OGI isn’t new — the infrared cameras are well-established in the industry. What makes the aerial version unique is its ability to cover vast swaths of land in a fraction of the time. Flying between 100 to 200 feet off the ground, these systems can detect leaks as small as 0.3 kg/hr with precision.

And unlike survey data that flags the presence of methane, aerial OGI captures visual evidence — actual infrared footage of the leak itself. This gives operators actionable context: Where is the leak? What’s the suspected component? How large is the plume? This kind of information enables faster, more targeted follow-up and minimizes downtime or redundant site visits.

In addition to emissions detection, aerial OGI adds a layer of real-time safety monitoring, thanks to its visual capabilities. And with its federal approval under the Methane Alternative Test Method (MATM-006), aerial OGI is not only efficient but also regulatory-compliant, offering operators peace of mind while improving the overall integrity of their monitoring programs.

Regulatory Compatibility and Use Cases

Aerial OGI is more than just a technology for detecting methane leaks — it offers the potential to replace traditional ground-based OGI inspections and Method 21 surveys, while also introducing a safety component that other methods lack. Thanks to federal approval under the EPA's Methane Alternative Test Method (MATM-006), aerial OGI has been validated as a regulatory-compliant alternative that fits seamlessly into existing LDAR programs.

Real-World Use Cases:

• Routine Quarterly Inspections: Aerial OGI can replace traditional inspections entirely. In expansive fields, like those in the Permian Basin, where access and distance can slow down regular inspections, aerial OGI helps operators cover more ground faster. Just as critically, it gives them visual confirmation of the leak source, allowing teams to plan efficient, targeted repairs rather than dispatching crews to troubleshoot in the dark.
• Remote and Hard-to-Reach Sites: Many oil and gas assets are in remote, rugged areas. Aerial OGI allows operators to survey large areas without the need for expensive mobilizations or delays. The leak imagery gives operators the information they need to decide whether a site needs immediate boots on the ground or can wait for a scheduled crew.
• Post-Incident or Weather-Related Delays: After extreme weather, aerial OGI offers rapid deployment to resume inspection coverage quickly. And because it produces actual leak images, operators can triage which leaks need urgent response and which can be deferred. This capability can keep LDAR programs on track even when the weather isn’t cooperating.
• Supplemental Monitoring and Continuous Coverage: Aerial OGI can enhance the monitoring frequency of sites, allowing for regular, proactive checks that go beyond the typical inspection cycle. Combined with real-time safety visuals, it provides oversight for both emissions and operational risks. And when a leak is found, the visual data helps prioritize repair workflows, giving maintenance teams a clear picture of what they’re walking into.

A New Era for Methane Monitoring

The integration of aerial OGI into LDAR programs represents a major step forward in methane detection technology. By offering a proven, field-ready solution that can replace traditional ground-based OGI and Method 21 inspections, aerial OGI opens up new possibilities for operators looking to improve both the efficiency and scope of their emissions management strategies.

With its federal approval under MATM-006, aerial OGI is a reliable, regulatory-compliant alternative that can seamlessly integrate into existing workflows. It is especially valuable for operators managing large, remote, or challenging sites, where traditional inspection methods may be impractical or inefficient.

Just as importantly, aerial OGI shows the leak. Operators can see exactly where the emissions are coming from and how severe they are — making follow-up faster, smarter, and safer.

And as seen in the Permian Basin during a recent flight, the benefits don’t stop at emissions. During a routine inspection, the aerial OGI crew noticed a vehicle stranded in an area affected by heavy flooding. The location had poor reception, making it difficult for the individual to contact help. Thanks to the aerial team's real-time visual capabilities, they were able to relay the vehicle's location to rescue personnel, leading to a quick rescue.

In the end, aerial OGI doesn’t just streamline compliance; it brings clarity, speed, and oversight to LDAR programs. It empowers teams with the information they need to act quickly — whether it's to stop a leak or save a life.

The future of methane monitoring is here — and it’s flying overhead.