Unraveling the complexity of deep gas accumulations with three-dimensional multimodal CARS microscopy

  1. Get@NRC: Unraveling the complexity of deep gas accumulations with three-dimensional multimodal CARS microscopy (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1130/G33321.1
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Journal titleGeology
Pages10631066; # of pages: 4
SubjectCoherent anti-Stokes Raman scattering; Deep gas; Fluid inclusion; Gas generation; Geological materials; Higher hydrocarbons; Hydrocarbon cracking; Multi-modal; Nonlinear optical microscopy; Origin of natural gas; Spatially resolved; Two-photon excited; C (programming language); Coherent scattering; Methane; Mineralogy; Natural gas; Nonlinear optics; Optical microscopy; Organic compounds; Positive ions; Raman spectroscopy; Three dimensional; Characterization; fluid inclusion; geoaccumulation; hydrocarbon generation; three-dimensional modeling
AbstractThe origin of natural gas accumulations in thermally mature basins is poorly understood. Unraveling complex contributions from hydrocarbon cracking, mixing, redox alteration, and deeper sources requires analysis of gases trapped during specifi c periods of basin history. Fluid inclusions can provide such samples, but their unambiguous characterization is challenging. Here we show that three-dimensional (3-D) multimodal nonlinear optical microscopy of geologic materials allows mapping and molecular identifi cation of trapped methane and water using coherent anti-Stokes Raman scattering, imaging of crystallographic features using second harmonic generation, and identifi cation of higher hydrocarbons using twophoton excited fl uorescence. Spatially resolved, molecule-specifi c characterization of fl uid inclusions will improve models of natural gas generation, migration, and accumulation. We believe that these broadly applicable methods will potentially transform the characterization of geological materials. © 2012 Geological Society of America.
Publication date
AffiliationSecurity and Disruptive Technologies; National Research Council Canada
Peer reviewedYes
NPARC number21270074
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Record identifier0cebedc9-78c1-480f-a167-e7b791eacab6
Record created2013-12-19
Record modified2016-05-09
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