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Prediction of the Planar Distribution of Liquid-Rich Hydrocarbons in Duvernay Shale in the West Canadian Sedimentary Basin

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Proceedings of the International Field Exploration and Development Conference 2018 (IFEDC 2018)

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Abstract

Shale gas reserves and production of Canada come mainly from Duvernay shale in West Canadian Sedimentary Basin (WCSB). According to the experience in shale gas exploration and development in North America, in addition to technology improvement, quantitatively evaluating the planar distribution of liquid-rich hydrocarbons in shale gas and increasing the liquid production of an individual well are one of the approaches for increasing economic benefits. The planar distribution of different grades of hydrocarbons in Duvernay shale gas is quantitatively predicted comprehensively using the pyrolysis experiment data, carbon isotope data, gas composition data and production data based on the theory of geochemistry. According to the variation of the pyrolysis experiment parameters of samples before and after extraction, the quantitative relations of ∆S2 with Ro, ∆S2/S2 with Ro, ∆HI with Ro and ∆HI with HIunextracted are established and HIunextracted is corrected. The quantitative relations of carbon isotope, dry gas index and butane isomer with corrected HI are studied, the quantitative formulas of carbon isotope, dry gas index and butane isomer with corrected HI are established, and the HI value of wells without the pyrolysis experiment data is calculated. According to production data, the quantitative relation of HI with CGR is established, and the HI value division standard for different grades of liquid-rich hydrocarbons is determined. The planar distribution diagram of HI values is plotted, and according to the division standard for different grades of liquid-rich hydrocarbons, the planar distribution of different grades of liquid-rich hydrocarbons is predicted quantitatively. The results indicate that (1) the pyrolysis comparison experiments before and after extraction indicate that ∆S2, ∆S2/S2 and ∆HI have a good correlation with Ro, ∆HI also has good correlation with HIunextracted, and these quantitative relations can be used to correct HIunextracted. (2) The corrected HI has a very good correlation with carbon isotope, butane isomer and dry gas index, and the HI value of wells without the pyrolysis experiment data can be calculated quantitatively using the quantitative regression relations. (3) The corrected HI has a very good correlation with CGR. The quantitative division standard for liquid-rich hydrocarbons has been established according to production data, and the planar distribution of all grades of liquid hydrocarbons can be predicted according to HI. (4) The zonation of all grades of liquid hydrocarbons is obvious in the study area. The dry gas region is distributed mainly in the structural deformation belt and Leduc ring reef belt. The northeast region of the study area is mainly a rich oil region. Gas condensate, rich gas condensate and very rich gas condensate are distributed in NW-SE banded shape from Simonette area to Willesden Green.

Copyright 2018, Shaanxi Petroleum Society.

This paper was prepared for presentation at the 2018 International Field Exploration &Development Conference in Xi’an, China, 18–20 September 2018.

This paper was selected for presentation by the IFEDC&IPPTC Committee following review of information contained in an abstract submitted by the author(s). Contents of the paper, as presented, have not been reviewed by the IFEDC&IPPTC Committee and are subject to correction by the author(s). The material does not necessarily reflect any position of the IFEDC&IPPTC Committee, its members. Papers presented at the Conference are subject to publication review by Professional Committee of Petroleum Engineering of Shaanxi Petroleum Society. Electronic reproduction, distribution, or storage of any part of this paper for commercial purposes without the written consent of Shaanxi Petroleum Society is prohibited. Permission to reproduce in print is restricted to an abstract of not more than 300 words; illustrations may not be copied. The abstract must contain conspicuous acknowledgment of IFEDC&IPPTC. Contact email: paper@ifedc.org.

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Acknowledgements

This work was supported by China National Science and Technology Major Project (Grant No: 2011ZX05028-002). We would like to thank EIA and ERCB for the data used in the paper. We are grateful to the authors for their research findings cited in the paper. We also thank the anonymous reviewers and the editors for their constructive comments and suggestions, which improved the manuscript.

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Authors and Affiliations

  1. Research Institute of Petroleum Exploration and Development, PetroChina, Beijing, China

    Houqin Zhu, Xiangwen Kong & Yuzhong Xing

  2. School of Earth Science and Resources, Changan University, Xi’an, Shaanxi, China

    Yinchao Huai

Authors
  1. Houqin Zhu
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  2. Yinchao Huai
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  3. Xiangwen Kong
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  4. Yuzhong Xing
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Correspondence to Houqin Zhu .

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Editors and Affiliations

  1. College of Petroleum Engineering, Xi’an Shiyou University, Xi’an, Shaanxi, China

    Jia'en Lin

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Zhu, H., Huai, Y., Kong, X., Xing, Y. (2020). Prediction of the Planar Distribution of Liquid-Rich Hydrocarbons in Duvernay Shale in the West Canadian Sedimentary Basin. In: Lin, J. (eds) Proceedings of the International Field Exploration and Development Conference 2018. IFEDC 2018. Springer Series in Geomechanics and Geoengineering. Springer, Singapore. https://doi.org/10.1007/978-981-13-7127-1_40

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  • DOI: https://doi.org/10.1007/978-981-13-7127-1_40

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