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Natural Gas Reservoir Characteristics and Non-Darcy Flow in Low-Permeability Sandstone Reservoir of Sulige Gas Field, Ordos Basin

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  • Xiaoying Lin

    (School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China
    School of Water Conservancy Engineering, Zhengzhou University, Zhengzhou 450001, China)

  • Jianhui Zeng

    (State Key Laboratory for Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China)

  • Jian Wang

    (School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China)

  • Meixin Huang

    (School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China)

Abstract

In order to reveal the gas–water distribution and formation mechanism of the low-permeability sandstone gas reservoir, the gas reservoir distribution and the formation mechanism in a low-permeability sandstone gas reservoir are investigated using data obtained from a physical simulation experiment of gas percolation. The exploration and experimenting for petroleum in the upper Paleozoic gas pool of the Sulige gas field in the Ordos basin in this paper. Results showed that the gas reservoir is characterized by low gas saturation, a complex distribution relationship of gas–water, and weak gas–water gravity differentiation. The characteristics of gas distribution are closely related to permeability, gas flow, and migration force. The capillary pressure difference is the main driving force of gas accumulation. There exists a threshold pressure gradient as gas flows in low-permeability sandstone. The lower that permeability, the greater the threshold pressure gradient. When the driving force cannot overcome the threshold pressure (minimal resistance), the main means of gas migration is diffusion; when the driving force is between minimal and maximal resistance, gas migrates with non-Darcy flow; when the driving force is greater than maximal resistance, gas migrates with Darcy flow. The complex gas migration way leads to complicated gas- water distribution relationship. With the same driving force, gas saturation increases with the improvement of permeability, thus when permeability is greater than 0.15 × 10 −3 µ m 2 , gas saturation could be greater than 50%.

Suggested Citation

  • Xiaoying Lin & Jianhui Zeng & Jian Wang & Meixin Huang, 2020. "Natural Gas Reservoir Characteristics and Non-Darcy Flow in Low-Permeability Sandstone Reservoir of Sulige Gas Field, Ordos Basin," Energies, MDPI, vol. 13(7), pages 1-17, April.
  • Handle: RePEc:gam:jeners:v:13:y:2020:i:7:p:1774-:d:342348
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    References listed on IDEAS

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    1. Jinliang Zhang & Longlong Liu & Ruoshan Wang, 2017. "Geostatistical Three-Dimensional Modeling of a Tight Gas Reservoir: A Case Study of Block S6 of the Sulige Gas Field, Ordos Basin, China," Energies, MDPI, vol. 10(9), pages 1-16, September.
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    Cited by:

    1. Zehou Xiang & Kesai Li & Hucheng Deng & Yan Liu & Jianhua He & Xiaoju Zhang & Xianhong He, 2021. "Research on Test and Logging Data Quality Classification for Gas–Water Identification," Energies, MDPI, vol. 14(21), pages 1-18, October.

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