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TitleInversion of source rock hydrocarbon generation kinetics from Rock-Eval data
AuthorChen, Z; Liu, X; Guo, Q; Jiang, C; Mort, A
SourceFuel vol. 194, 2017 p. 91-101, https://doi.org/10.1016/j.fuel.2016.12.052
Year2017
Alt SeriesEarth Sciences Sector, Contribution Series 20160303
PublisherElsevier
Documentserial
Lang.English
Mediapaper; on-line; digital
File formatpdf; grid
Subjectsfossil fuels; geochemistry; petroleum resources; hydrocarbon potential; hydrocarbons; source rocks; hydrocarbon generation; thermal maturation; organic geochemistry; pyrolysis; kerogen; modelling; basins; temperature; Western Canada Sedimentary Basin; Duvernay Shale; methodology; kinetic inversion method; rock-eval analyses; source rock kinetics; method validation; case studies; activation energy
Illustrationsflow diagrams; bar graphs; graphs; cross-sections; tables; models
ProgramShale-hosted petroleum resource assesment, Geoscience for New Energy Supply (GNES)
ProgramProgram of Energy Research and Development (PERD)
AbstractBasin and petroleum system modeling requires source rock kinetics as input for the reconstruction of hydrocarbon generation history. For less well-studied petroleum systems, there may be little information on petroleum generation kinetic parameters publically available; thus, an analog of representative source rock kinetics must be chosen from available kinetics databases. Recent studies suggest that source rock kinetics may vary considerably even when they contain the same type of kerogen. Thus, kinetic parameters from analog basins/source rocks may lead to erroneous results in petroleum generation history reconstruction. Rock-Eval data contain information about source rock kinetics, and can be used to improve the kinetic model in petroleum system modeling. However, the kinetic information in Rock-Eval data is not in the form of activation energies and frequency factors required to solve the temperature dependency of reaction rate in the Arrhenius equation. This article proposes a kinetic inversion method so that the analogous kinetic model chosen by the user can be improved based on Rock-Eval data of the targeted source rock. We demonstrate the method using a synthetic dataset in a case study for method validation and its application to real source rock evaluation for examples from the Devonian Duvernay Shale in the Western Canada Sedimentary Basin (WCSB).
Summary(Plain Language Summary, not published)
Basin modeling requires source rock kinetics as input for the reconstruction of hydrocarbon generation history. For less well-studied basins, there may be little information on generation kinetic parameters publically available and an analog of representative source rock kinetics may have to be chosen from available databases. Recent studies suggest that source rock kinetics may vary considerably even for the same type of kerogen. Thus, kinetic parameters from analog source rocks may lead to erroneous results in generation history reconstruction. Rock-Eval data contain information about source rock kinetics, but is not in the form required and cannot be used directly in basin modeling. This article proposes an inversion technique so that the analogous kinetic model chosen by the user can be improved based on Rock-Eval data of the targeted source rock. The method and its application are demonstrated through the source rock evaluation of the Devonian Duvernay Shale in the Western Canada Sedimentary Basin.
GEOSCAN ID299594