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Geochemistry Many tools are used to analyze and study shales. The TOC (total organic carbon) is typically determined as the difference between total organic carbon and the carbonate carbon concentration. While both of the latter measurements are generally made with cuttings or core samples, petrophysical estimates of TOC can provide excellent and continuous estimates of […]

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Shale as reservoirs? Shales are known to be the principal sources for conventional hydrocarbon plays. They also often function as reservoir seals because of their low permeabilities.  They can also be the reservoir and trap under certain circumstances. Most of the gas created in such reservoirs would be thermogenic in origin although some shales (e.g. the Antrim) have […]

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Nathan Meehan
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