| Title | Shale oil resource potential and mobility assessment: a case study of Upper Devonian Duvernay shale in the Western Canada Sedimentary Basin |
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| Author | Chen, Z ; Li, M;
Jiang, C; Qian, M |
| Source | Oil and Gas Geology vol. 40, no. 6, 2019 p. 459-468 |
| Links | Online - En ligne
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| Year | 2019 |
| Alt Series | Natural Resources Canada, Contribution Series 20180454 |
| Publisher | OriProbe Information Services |
| Document | serial |
| Lang. | Chinese |
| Media | paper; on-line; digital |
| File format | pdf |
| Province | Alberta |
| NTS | 72M; 73D; 73E; 73L; 73M; 74D; 82M; 82N; 82O; 82P; 83; 84A; 84B; 84C; 84D; 93A; 93H; 93I; 93P; 94A |
| Lat/Long WENS | -120.0000 -110.0000 57.0000 51.0000 |
| Subjects | fossil fuels; sedimentology; geochemistry; Science and Technology; Nature and Environment; petroleum resources; hydrocarbon potential; hydrocarbons; oil; gas; resource estimation; sedimentary basins;
bedrock geology; lithology; sedimentary rocks; shales; Upper Devonian; reservoir rocks; source rocks; porosity; pore structure; models; Western Canada Sedimentary Basin; Duvernay Formation; Phanerozoic; Paleozoic; Devonian |
| Program | Geoscience for New Energy Supply (GNES) Shale-hosted petroleum resource assessment |
| Released | 2019 01 01 |
| Abstract | Shale oil reservoir is a source-reservoir-caprock integration characterized by dual-porosity with nano-pores being dominant. Oil mobility in the reservoir is one of the key geological factors for the
commercial resource development with success. Shale oil resource evaluation method based on conventional reservoir volumetric approach is subject to the pore structure of simple matrix and not applicable to assess the resources according to their
states of occurrence in reservoir. As such it cannot provide adequate information with respect to oil and gas mobility for making resource development decisions. The state of occurrence of shale oil and gas is primarily controlled by the maturity and
types of source rocks, and Rock-Eval pyrolysis data contain critical information related to source rock types and maturity. According to the states of oil occurrence in shale reservoir, the oil and gas resources are divided into three categories:
non-movable (adsorbed), restricted, and movable resources, to quantitatively describe the mobility of oil and gas in shale reservoir. Combined with the production and reservoir data from the Upper Devonian Duvernay shale oil field in the Western
Canada Sedimentary Basin, empirical models are established for assessing resources in terms of shale oil reservoir parameters and pyrolysis data, and then oil formation volume factor is used to estimate the evaporative loss of light hydrocarbons for
pyrolysis parameter (S1) during coring and sampling. A single well evaluation of Duvernay shale oil and gas resource potential in Well 8-32-46-9 W5 is taken as an example to introduce the principles and demonstrate the application of the proposed
method in shale oil resource assessment. The resource potential of the block with Well 8-32-46-9 W5 as its core calculated by this method and with 10% recovery discounted, is consistent with the result derived from production decline model based on
actual production data in adjacent areas, which demonstrates that the shale oil resource assessment method proposed here based on pyrolysis data and hydrocarbon generation kinetics model is feasible. |
| Summary | (Plain Language Summary, not published)
Shale oil reservoir is a self-sourced and self-retained system with mixed pore systems that have different origins and properties. Oil movability is a
key geological factor for successful resource development. Current resource evaluation method is based on conventional reservoir is unable to assess oil mobility, providing inadequate information for resource development decision. We propose the use
of pyrolysis data to determine oil mobility. The oil and gas resources are classified into three categories: non-movable, restricted and movable resources, to describe the mobility of oil and gas in shale reservoir. A single well evaluation of
Duvernay shale oil and gas resource potential in 8-32-46-9W5 well is taken as an example to introduce the principles and demonstrate the application of the proposed method in shale oil resource assessment. The resource potential from this proposed
method is consistent with the result derived from production decline model based on actual production data, demonstrating that the proposed method is feasible. |
| GEOSCAN ID | 314563 |
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