| Title | Optimizing parameter 'total organic carbon content' for shale oil and gas resource assessment: taking West Canada Sedimentary Basin Devonian Duvernay Shale as an example |
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| Author | Wang, P; Chen, Z ;
Jin, Z; Guo, Y; Chen, X; Jiao, J; Guo, Y |
| Source | Earth Science - Journal of China University of Geosciences vol. 44, issue 2, 2019 p. 504-512, https://doi.org/10.3799/dqkx.2018.191  Open Access |
| Year | 2019 |
| Alt Series | Natural Resources Canada, Contribution Series 20190090 |
| Publisher | China University of Geosciences |
| Document | serial |
| Lang. | Chinese |
| Media | paper; on-line; digital |
| Province | Alberta |
| NTS | 72M; 73D; 73E; 73L; 73M; 74D; 82N; 82O; 82P; 83; 84A; 84B; 84C; 84D |
| Lat/Long WENS | -120.0000 -110.0000 57.0000 51.0000 |
| Subjects | fossil fuels; geochemistry; petroleum resources; hydrocarbon potential; hydrocarbons; gas; oil; bedrock geology; lithology; sedimentary rocks; shales; sedimentary basins; scanning electron microscope
analyses; reservoir rocks; resource estimation; thermal maturation; Western Canada Sedimentary Basin; Duvernay Shale; Methodology; Phanerozoic; Paleozoic; Devonian |
| Released | 2019 02 01 |
| Abstract | (unpublished)
Total organic carbon (TOC) content is regarded as one of the important standards for shale oil and gas "sweet spot" prediction and potential resource evaluation. Taking Devonian
Duvernay shale in West Canada sedimentary basin as an example, in this paper uses scanning electron microscope and methane adsorption measurements to discuss the weakness of using measured TOC as parameter for reservoir and gas capacity. Initial TOC
was restored, and the measured and initial TOC vs. Langmuir volume was studied to reveal their difference as evaluation parameter. The result suggests that the difference between initial TOC and measured TOC varies significantly with the ratio
ranging from 1.69-1.02, which increases with the thermal maturity. Thus, low measured TOC value doesn't represent low initial TOC value. Organic pore growth in Duvernay shale has no correlation with measured TOC, which means that the measured TOC is
not the optical parameter to describe shale reservoir. Compared with measured TOC, Langmuir volume exhibits better correlations with initial ones, indicating initial TOC determines gas-adsorption behavior. Thus, in this paper it is evidenced to use
initial TOC, rather than measured ones, as shale oil and gas evaluation parameters. |
| GEOSCAN ID | 314744 |
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