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Proceedings Paper

A He-Ne Laser-Based Field-Device For Oil And Gas Prospecting
Author(s): K. J. Jordan; E. R. Menzel
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Paper Abstract

Atmospheric methane surveys may outline prospective oil and natural gas reservoirs. Methane sensing can also be applied to detect gas leakage of pipelines or landfills. We describe a field-device capable of measuring small changes in methane concentration in the near-surface atmosphere for such surveys. The detection of methane uses the attenuation of the 3.3922 μm He-Ne laser line in a pressurized flow cell through which air circulates at a regulated pressure of about 3 atmospheres. A second He-Ne laser line at 3.3912 μm, which is only weakly absorbed by methane, is used as a reference for ratio recording to compensate for laser intensity fluctuations and scattering by water or dust. The device is operated from a moving vehicle. Thus, sampling is continuous, i.e., large areas can rapidly be surveyed. Field tests showed the device to be rugged enough to withstand the rigors of off-road travel as well as summer heat.

Paper Details

Date Published: 6 April 1987
PDF: 5 pages
Proc. SPIE 0737, New Developments and Applications in Gas Lasers, (6 April 1987); doi: 10.1117/12.939672
Show Author Affiliations
K. J. Jordan, Texas Tech University (United States)
E. R. Menzel, Texas Tech University (United States)

Published in SPIE Proceedings Vol. 0737:
New Developments and Applications in Gas Lasers
Lee R. Carlson, Editor(s)

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