Everything you need to know about methane sources, monitoring, and mitigation.
Methane is crucial for near-term climate action. Reducing methane emissions, especially for O&G producers, offers fast climate benefits and is often one of the most cost-effective steps toward meeting net-zero commitments.
Key sources include well pad equipment, compressors, storage tanks, unlit flares, and gas processing plants. A small number of large leaks from this equipment—so-called “super-emitters”—often dominate total emissions.
Generally, source-level emissions are broken down by component (e.g., tank vent, pneumatic valve). Site-level emissions can be a total emission for an entire facility, or simply top-down measurements at the equipment group scale. Source-level data supports diagnostics and mitigation; site-level supports inventory rollup, regulatory reporting, and identification of missing or unexpected sources.
Materiality refers to whether an emissions source is significant enough to meaningfully impact reported totals or decisions. Small or uncertain sources may be excluded if they fall below an established materiality threshold.
Highwood tracks a database of over 200 commercial technologies, including handheld systems, drones, ground-based vehicles, aircraft, satellites, and continuous monitoring systems. Each offers trade-offs in sensitivity, coverage, and cost.
Yes. Modern satellites (e.g., GHGSat, TROPOMI, Carbon Mapper) can detect and quantify large methane plumes. They are most effective for super-emitter events and regional mapping and may miss small or intermittent leaks.
This is assessed through controlled testing or field validation—measuring how often the tech detects leaks of known size and type under varying conditions.
AI/ML can analyze enhance detection speed and accuracy, improve insights, and identify patterns, but still require robust training data. Reporting cannot be “black box” and AI has important limitations with respect to verifiability.
Poor flare efficiency means that unburned methane escapes during flaring. Ensuring high combustion efficiency is essential to achieve low methane intensity.
Credibility depends on measurement quality, documentation, uncertainty analysis, and alignment with established protocols. Using third-party verification, reconciling estimates with measurements, and ensuring methodological transparency are key indicators.
Verification involves an independent auditor reviewing your emissions data, methods, and assumptions. The goal is to assess credibility and transparency. It’s often required for certification, regulatory compliance, or investor assurance.
Typical gaps include missing activity data, unmeasured intermittent events, outdated emission factors, lack of uncertainty bounds, inconsistent monitoring, or unaccounted sources like episodic venting or combustion slip.
At a minimum, most companies update emissions inventories annually, aligning with most reporting frameworks and regulations. However, some companies opt for monthly or quarterly internal reporting.
Dozens of strategies exist, which include but are not limited to leak detection and repair (LDAR), replacing pneumatic devices, improving compressors, capturing vented gas, installing vapor recovery units, optimizing combustion, and deploying continuous monitoring or other technologies.
Options include using temporary capture systems, reducing blowdowns, routing gas to flare or recovery units, and timing maintenance during low-pressure periods. Planning and equipment upgrades can minimize emissions from scheduled operations.
Costs are typically measured in dollars per tonne of CO₂-equivalent reduced. Many methane mitigation measures have low or even negative costs, meaning the value of the captured gas can offset or exceed program expenses.
Rank by emission magnitude, mitigation cost-effectiveness, regulatory exposure, and reputational or commercial risk. Tools like marginal abatement cost curves and scenario models (e.g., LDAR-Sim) help guide decisions.
Timelines range from several months to years, depending on data availability, measurement needs, and organizational complexity. Early planning and internal alignment accelerate the process. Highwood often helps deliver MIIs ahead of deadlines.
Highwood offers online courses via SAGA Wisdom and live custom sessions covering methane fundamentals, regulations (OGMP, MiQ, EPA), technology, mitigation, and inventory best practices—for both technical and leadership teams.
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