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TitleSource rock characteristics and Rock-Eval-based hydrocarbon generation kinetic models of the lacustrine Chang-7 Shale of Triassic Yanchang Formation, Ordos Basin, China
AuthorChen, Z; Guo, Q; Jiang, D; Liu, X; Reyes, J; Mort, A; Jia, Z
SourceInternational Journal of Coal Geology vol. 182, 2017 p. 52-65, https://doi.org/10.1016/j.coal.2017.08.017
Year2017
Alt SeriesNatural Resources Canada, Contribution Series 20170077
PublisherElsevier
Documentserial
Lang.English
Mediapaper; on-line; digital
File formatpdf
AreaChina
Lat/Long WENS 108.0000 111.0000 40.0000 35.0000
Subjectsgeneral geology; fossil fuels; hydrocarbon generation; depositional environment; provenance; hydrocarbon potential; oil shales; source rocks; lacustrine environments; facies analyses; Ordos Basin; Chang-7 Shale; Triassic
Illustrationslocation maps; tables; stratigraphic columns; graphs; photomicrographs
ProgramShale-hosted petroleum resource assesment, Geoscience for New Energy Supply (GNES)
AbstractHighly variable depositional environment and multiple provenances caused rapid changes in facies laterally and vertically, resulting in contrasting hydrocarbon generation potential and kinetics within the Chang-7 Shale of the upper Triassic Yanchang Formation of Ordos Basin, China. Assessing the shale oil resource potential requires several geochemical models that provide adequate information for characterizing the variations. As traditional generation kinetics is derived from a single immature sample, the kinetic model will not be representative for such variations. This paper discusses the source rock heterogeneity and develops hydrocarbon generation kinetic models for the Chang-7 Shale using kinetics inversion techniques from routine Rock-Eval data. Data collected from various sources for the Chang-7 Shale were analyzed and subdivided into groups based on their bulk geochemical properties and linked to petrophysical facies to describe the facies variation. Hydrocarbon generation kinetic parameters were then estimated for each of the source rock groups. This study suggests that multiple kinetic models better handle spatial variation in evaluating source rock kinetics and resource potential in a lacustrine basin with highly variable lateral organofacies.
Summary(Plain Language Summary, not published)
Assessing the shale oil resource potential requires representative geochemical models that provide adequate information for characterizing the variations. Traditional single sample kinetic model from immature samples may not be representative for the variation. This paper discusses the source rock heterogeneity and develops hydrocarbon generation kinetic models for the Chang-7 Shale using kinetics inversion techniques from routine Rock-Eval data. This study suggests that multiple kinetic models better handle the spatial variation in evaluating source rock kinetics and resource potential for basin with highly variable lateral organofacies in a lacustrine setting.
GEOSCAN ID301641