Oil-generation windows are still commonly expressed as vitrinite-reflectance (Ro) values, but are better when shown as Transformation Ratio. In this video Doug Waples examines the complex and not-yet-fully resolved relationship between TR and Ro, points out the serious consequences of weaknesses in the standard kinetic methods, describes some alternative ways of choosing A factors and activation-energy distributions, and proposes new research to solve once and for all the problem of assigning A factors to individual kerogens. Potential rewards (much improved modeling of hydrocarbon generation) of success in this endeavor are large.

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