The Evolution of Petrophysical Properties During Thermal Maturation, as a Function of Various Hydrocarbon Fractions Comprising the Total Organic Carbon Content
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Date
2018-05-16
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Abstract
Rock Eval pyrolysis is a standard industry technique used to evaluate the hydrocarbon-generating potential of a formation by quantifying its total organic matter content and thermal maturity. By utilizing a new Rock Eval procedure (ESH Rock Eval), in which the heating rate is slowed down over an extended temperature range, different hydrocarbon components are more easily distinguished due to enhanced peak resolution. The impacts of these various hydrocarbon types on reservoir quality is evaluated by observing the evolution of organic matter and petrophysical properties during pyrolysis. With the elution of the free hydrocarbons in the sample (S1 peak in Rock Eval), petrophysical properties do not notably change. However, significant changes occur after the S2a and S2b peaks, which correspond to the pyrolysis of pervasive, fluid-like hydrocarbon residue (FHR) which coats mineral grains, and the remaining organic matter (solid bitumen) that resides in the larger pore spaces in the samples, respectively. This work was evaluated utilizing core and drill cuttings samples from the Montney, Duvernay and Doig Formations from the Western Canadian Sedimentary Basin.
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Solid Bitumen, Rock Eval pyrolysis, petrophysics, porosity, permeability, pore size distribution, Montney Formation, Duvernay Formation, Doig Formation, organic matter, fluid-like hydrocarbon residue (FHR), hydrocarbon, petrology
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Clarke, K. M. (2018). The Evolution of Petrophysical Properties During Thermal Maturation, as a Function of Various Hydrocarbon Fractions Comprising the Total Organic Carbon Content (Master's thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/31937