Improved Model for Characterization of Fractal Features of the Pore Structure in a High-Rank Coalbed Methane Formation
- Авторы: Jiang J.1, Du J.1,2, Wang Y.1, Wang F.3, Feng K.3, Leng C.2
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Учреждения:
- College of Oil and Natural Gas Engineering, Southwest Petroleum University
- College of Mining Engineering, North China University of Science and Technology
- China United Coalbed Methane Corporation, Ltd
- Выпуск: Том 55, № 3 (2019)
- Страницы: 319-330
- Раздел: Article
- URL: https://journals.rcsi.science/0009-3092/article/view/235860
- DOI: https://doi.org/10.1007/s10553-019-01035-3
- ID: 235860
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Аннотация
In this paper, we propose a theoretically derived improved model for characterizing the fractal features of coalbed methane reservoirs, and we compare with previously published models for conventional reservoirs. The model was verified by mercury intrusion porosimetry. The results have shown that there is no linear relationship between the normalized wetting phase saturation, wetting phase saturation, or mercury saturation vs. the capillary pressure on a log-log plot. Therefore existing models are inapplicable for a high-rank CBM formation, which is characterized by low permeability and porosity. The improved model lets us calculate the multi-interval fractal features characterizing the physical properties of the formation. We show that higher fractal dimensions mean poorer physical properties of the formation.
Об авторах
Jianxun Jiang
College of Oil and Natural Gas Engineering, Southwest Petroleum University
Email: bortum@mail.ru
Китай, Chengdu
Jingguo Du
College of Oil and Natural Gas Engineering, Southwest Petroleum University; College of Mining Engineering, North China University of Science and Technology
Email: bortum@mail.ru
Китай, Chengdu; Chengdu
Yongqing Wang
College of Oil and Natural Gas Engineering, Southwest Petroleum University
Email: bortum@mail.ru
Китай, Chengdu
Fenglin Wang
China United Coalbed Methane Corporation, Ltd
Email: bortum@mail.ru
Китай, Beijing
Kun Feng
China United Coalbed Methane Corporation, Ltd
Email: bortum@mail.ru
Китай, Beijing
Chunpeng Leng
College of Mining Engineering, North China University of Science and Technology
Email: bortum@mail.ru
Китай, Chengdu