Downwind transect quantification of methane - peak covariance method

The peak covariance method using an anemometer and trace gas analyzer effectively quantifies methane emissions by employing a peak covariance equation, improving accuracy and addressing discrepancies in existing methane emission quantification systems.

WO2026112416A1PCT designated stage Publication Date: 2026-05-28UNIVERSITY OF WYOMING
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
UNIVERSITY OF WYOMING
Filing Date
2025-11-21
Publication Date
2026-05-28

AI Technical Summary

Technical Problem

Existing methane emission quantification methods in the oil and gas industry suffer from discrepancies between top-down and bottom-up estimates, with uncertainties persisting due to differences among similar methods and the significant contribution of low-frequency, high-emission events, necessitating improved detection and quantification systems.

Method used

A peak covariance method using an anemometer and trace gas analyzer to measure wind variables and trace gas concentrations, employing a peak covariance equation to quantify methane emissions, which includes regression coefficients and measured wind and trace gas data.

Benefits of technology

The method achieves high accuracy in quantifying methane emissions with an R² value of greater than 0.95 for trace gas concentration rates from about 0 kg/hr to about 25 kg/hr, and an R² value of greater than 0.60 for rates less than about 10 kg/hr, addressing the discrepancies and uncertainties in existing methods.

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Abstract

The present disclosure relates to a method of quantification of methane enhancements. The method includes deploying an anemometer of a measurement system to measure wind variables at a point source emitter. A trace gas analyzer of the measurement system is deployed to measure a trace gas concentration at the point source emitter. The trace gas concentration is quantified using a peak covariance equation, wherein the peak covariance equation comprises: Fx = β0 + ∑iβixi + ∑j≠kβjxjxk wherein Fx is an emission rate, βs are regression coefficients, and x is the measured wind speed and trace gas concentrations.
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