Comparative studies on methane isothermal adsorption models of shale of Longmaxi formation in Pengshui area

TANG Jianxin

doi:10.13809/j.cnki.cn32-1825/te.2019.04.014

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Comparative studies on methane isothermal adsorption models of shale of Longmaxi formation in Pengshui area

更新时间：2025-12-05

- Comparative studies on methane isothermal adsorption models of shale of Longmaxi formation in Pengshui area
- Petroleum Reservoir Evaluation and Development Issue 4, Pages: 73-78(2019)
- 作者机构：
  
  中国石化华东油气分公司南川页岩气项目部,重庆,408400
- 作者简介：
- 基金信息：
- DOI：10.13809/j.cnki.cn32-1825/te.2019.04.014
  CLC： E32+8
- Published：2019
- 稿件说明：
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TANG Jianxin. Comparative studies on methane isothermal adsorption models of shale of Longmaxi formation in Pengshui area[J]. Petroleum Reservoir Evaluation and Development, 2019, (4): 73-78.
DOI：

TANG Jianxin. Comparative studies on methane isothermal adsorption models of shale of Longmaxi formation in Pengshui area[J]. Petroleum Reservoir Evaluation and Development, 2019, (4): 73-78. DOI： 10.13809/j.cnki.cn32-1825/te.2019.04.014.

摘要

为了研究不同等温吸附模型对等温吸附实验的模拟效果

更好地描述页岩甲烷吸附规律

对川东南PY1井的7块岩心样品开展了等温吸附实验。结果表明

最大过剩吸附量与有机质含量呈现明显正相关

Abstract

In order to study the simulation effects of different isothermal adsorption models on isothermal adsorption experiments and better describe the adsorption rule of shale methane

isothermal adsorption experiments were carried out on seven core samples from well PY1 in southeast of Sichuan Basin. The experimental results showed that the maximum excess adsorption amount was positively correlated with the organic matter content

and the maximum correlation coefficient was 0.859 4

while it was negatively correlated with clay minerals. The experimental results were simulated by different models. The simulation results of different models were quite different. Among them

the correlation coefficient fitted by the Langmuir model was the best

while the maximum excess adsorption amount obtained by the SDR model was the largest. Followed by that was the fixed Langmuir model. Both the SDR model and the modified Langmuir model had corrected the excess adsorption amount of the experimental results

but from the correction results

the adsorption phase density obtained by the SDR model was the most reasonable. Finally

the fixed density correction Langmuir model and the SDR model were considered to describe the adsorption of methane in the shale more accurately

which could guide the calculation of the shale adsorption gas content better.

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references

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沈瑞,郭和坤,胡志明,熊伟,左罗.页岩气高压吸附特征及其对储采规律的影响[J].地学前缘,2018(02).

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