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Pore Characteristics of Coal Reservoir in Jixi Basin

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Proceedings of the International Field Exploration and Development Conference 2019 (IFEDC 2019)

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Abstract

The pore structure is the core problem in the study of unconventional reservoirs such as coalbed methane (CBM), which not only controls the reservoir capacity but also affects the development evaluation. Taking coal in Jixi Basin as the research object, quantitative analysis of pore and fracture structure by low temperature nitrogen adsorption method, argon ion polishing scanning electron microscope and nuclear magnetic resonance (NMR), combined with energy spectrum analysis, whole rock analysis, coal components. Based on the experimental data, the main controlling factors of pore development in the Jixi Basin are discussed. The results show that the organic pores in the Jixi Basin are mainly gas pores, and the main pores are bottle-shaped pores. The mineral pores are mainly intercrystalline pores of clay minerals. The pores are cylindrical pores with open ends and parallel plate-shaped pores with openings on both sides. The low temperature nitrogen adsorption curves of coal all develop hysteresis loops, which have strong adsorption capacity and difficult desorption. The NMR spectrum shows two types of bimodal and trimodal distribution, the latter showing fracture development well, which is conducive to CBM migration. The degree of stomatal development is mainly controlled by the degree of evolution, and the mineral pores are closely related to the clay mineral content.

Copyright 2019, IFEDC Organizing Committee.

This paper was prepared for presentation at the 2019 International Field Exploration and Development Conference in Xi’an, China, 16–18 October, 2019.

This paper was selected for presentation by the IFEDC 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 Technical Team and are subject to correction by the author(s). The material does not necessarily reflect any position of the IFEDC Technical Committee its members. Papers presented at the Conference are subject to publication review by Professional Team of IFEDC Technical Committee. Electronic reproduction, distribution, or storage of any part of this paper for commercial purposes without the written consent of IFEDC Organizing Committee 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. Contact email: paper@ifedc.org.

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Acknowledgments

The project is supported by National Natural Science Foundation (Number 41702154).

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Authors and Affiliations

  1. Exploration and Development Research Institute of Daqing Oilfield Company Ltd., Daqing, 163712, Heilongjiang, China

    You-zhi Wang

  2. School of Geosciences, Northeast Petroleum University, Daqing, 163318, Heilongjiang, China

    Cui Mao & Jin-lin Liu

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  1. You-zhi Wang
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  2. Cui Mao
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Correspondence to You-zhi Wang .

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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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Wang, Yz., Mao, C., Liu, Jl. (2020). Pore Characteristics of Coal Reservoir in Jixi Basin. In: Lin, J. (eds) Proceedings of the International Field Exploration and Development Conference 2019. IFEDC 2019. Springer Series in Geomechanics and Geoengineering. Springer, Singapore. https://doi.org/10.1007/978-981-15-2485-1_75

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  • DOI: https://doi.org/10.1007/978-981-15-2485-1_75

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  • Publisher Name: Springer, Singapore

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  • Online ISBN: 978-981-15-2485-1

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