| Title | Quantitative prediction model of present-day low-TOC carbonate source rocks: Example from the Middle-upper Ordovician in the Tarim Basin |
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| Author | Chen, J Q; Pang, X Q ; Pang, H |
| Source | Energy Exploration and Exploitation vol. 36, 5, 2018 p. 1335-1355, https://doi.org/10.1177/0144598718758339  Open Access |
| Image |  |
| Year | 2018 |
| Alt Series | Natural Resources Canada, Contribution Series 20200187 |
| Publisher | Sage Publications Inc |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Area | Tabei Uplift; Tarim Basin; China |
| Lat/Long WENS | 76.0000 88.0000 42.0000 36.0000 |
| Subjects | Nature and Environment; Science and Technology; fossil fuels; Middle Ordovician; Upper Ordovician; organic carbon; organic carbon analyses; carbonate; carbonate rocks; well logging; source rocks;
hydrocarbons; models; Ordovician |
| Illustrations | location maps; distribution diagrams; stratigraphic columns; stratigraphic sections; models; plots; cross-plots; tables |
| Released | 2018 02 14 |
| Abstract | Plenty of marine crude oil generated by the Middle-Upper Ordovician source rocks has been discovered in the Tabei Uplift, Tarim Basin. Previous studies on the extensively distributed low organic matter
source rock total organic carbon <= 0.5%) imply that this contributes to oil accumulation. Thus, the identification of present-day low-total organic carbon source rocks that experience hydrocarbon expulsion and evaluation of their contribution is of
considerable significance to analyze marine oil accumulation and to assess the resources in the Tarim Basin. Using the mass balance approach, we identify and verify present-day low-total organic carbon carbonate source rocks and present a
quantitative model using well-logging data to predict the present-day low-total organic carbon carbonate source rocks in order to evaluate their contribution in the Tarim Basin. Hydrocarbon expulsion has occurred in the Yijianfang formation, which
has present-day low-total organic carbon, between 6452 and 6487 m in the Yangwu 2 well. In the horizons depicting carbonates with hydrocarbon expulsion, the porosity is relatively high and the daily oil production is 0.19 m(3) according to the
perforation tests. The extracts have similar biomarker signatures to that of the crude oils in the Tabei Uplift. In this study, a quick and cost-effective quantitative model is developed using double lateral resistivity and uranium/thorium
well-logging data. By applying the prediction model, the contribution of present-day low-total organic carbon carbonate source rocks in the Middle-Upper Ordovician formation of the Tarim Basin is primarily evaluated to be 363.38 x 10(9) bbl oil
equivalent. |
| GEOSCAN ID | 326599 |
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