An organic facies is a mappable subdivision of a designated stratigraphic unit, distinguished from the adjacent subdivisions on the basis of both the chemical and petrographic characteristics of its insoluble organic constituents (palynofacies or macerals), without regard to the inorganic aspects of the sediments, which in turn permits the prediction of the likely occurrence, and lateral variability, of hydrocarbon source potential as a function of depositional environment.
The concept of organic facies has evolved over the past 40 years following early publications by Rogers (1980), Jones and Demaison (1982), and Jones (1987). In the past two decades, knowledge and understanding of organic facies has become even more important with the enormous changes in exploration strategies resulting from, first, the shale gas boom and, second, the shale oil boom which followed a few years later. In both of these cases, the initial successes evolved as a result of...
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