Special Oil & Gas Reservoirs >

2022 , Vol. 29 >Issue 1: 59 - 65

DOI: https://doi.org/10.3969/j.issn.1006-6535.2022.01.009

Geologic Exploration

Pore Structure and Fractal Characteristics of Low-permeability Reservoirs in Songliao Basin

  • Lyu Tianxue ,
  • Zhang Guoyi ,
  • Yi Lixin ,
  • Li Zhongcheng ,
  • Song Peng ,
  • Li Siqi
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  • 1. Nankai university,Tianjing 300350, China;
    2. PetroChina Jilin Oilfield Company, Songyuan, Jilin 138000, China;
    3. PetroChina Liaohe Oilfield Company, Panjin, Liaoning 124010, China

Received date: 2021-03-24

  Revised date: 2021-11-07

  Online published: 2023-01-10

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Abstract

To address the problem of unclear understanding of the pore structure of low-permeability reservoirs in Quantou Formation, Wangfu Fault Depression, Songliao Basin, the fractal method of reservoir pores was applied in combination with experimental methods such as X-ray diffraction, casting slice, scanning electron microscopy, and mercury intrusion porosimetry, to determine the pore fractal characteristics of the low-permeability sandstone reservoir and discuss the relationship between the fractal dimension and the physical properties and mineral composition of the reservoir. The experimental results showed that: the pores of the reservoir in this area were mainly intergranular pores and intragranular dissolved pores; the mineral components were mainly quartz and feldspar; the pores of the reservoir were of multiple fractal characteristics, and the structure of small pores was better than that of medium and large pores; the fractal dimension was unrelated to the reservoir porosity, but closely correlated with permeability and mineral composition. This study discovers the pore size distribution characteristics of low-permeability reservoirs from the perspective of multiple fractal theory, and provides a basis for the development of low-permeability reservoirs in Quantou Formation, Wangfu Fault Depression, Songliao Basin.

Key words： low-permeability reservoir; pore structure; mineral composition; mercury intrusion porosimetry test; fractal dimension

Cite this article

Lyu Tianxue , Zhang Guoyi , Yi Lixin , Li Zhongcheng , Song Peng , Li Siqi . Pore Structure and Fractal Characteristics of Low-permeability Reservoirs in Songliao Basin[J]. Special Oil & Gas Reservoirs, 2022 , 29(1) : 59 -65 . DOI: 10.3969/j.issn.1006-6535.2022.01.009

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