页岩含气量计算新方法

doi:10.7623/syxb201504007

石油学报 ›› 2015, Vol. 36 ›› Issue (4): 469-474,481.DOI: 10.7623/syxb201504007

页岩含气量计算新方法

左罗^1,2, 王玉普³, 熊伟¹, 郭为^1,2, 高树生¹, 胡志明¹, 沈瑞¹

1. 中国科学院渗流流体力学研究所中国石油勘探开发研究院廊坊分院河北廊坊 065007;
2. 中国科学院大学物理学院北京 100190;
3. 中国工程院北京 100088

收稿日期:2014-10-25 修回日期:2015-01-26 出版日期:2015-04-25 发布日期:2015-04-04
通讯作者: 左罗,男,1988年9月生,2011年毕业于西南石油大学石油工程专业,现为中国科学院渗流流体力学研究所博士研究生,主要从事非常规天然气开发研究工作。Email:zuoluoxingfeng@163.com
作者简介:左罗,男,1988年9月生,2011年毕业于西南石油大学石油工程专业,现为中国科学院渗流流体力学研究所博士研究生,主要从事非常规天然气开发研究工作。Email:zuoluoxingfeng@163.com
基金资助:
国家重大科技专项(2011ZX05018-005)和国家重点基础研究发展计划(973)项目(2013CB228000)资助。

A new method to calculate the shale gas content

Zuo Luo^1,2, Wang Yupu³, Xiong Wei¹, Guo Wei^1,2, Gao Shusheng¹, Hu Zhiming¹, Shen Rui¹

1. Institue of Porous Flow & Fluid Mechanics, Chinese Academy of Science; Langfang Branch, PetroChina Research Institue of Petroleum Exploration & Development, Hebei Langfang 065007, China;
2. School of Physics, University of Chinese Academy of Sciences, Beijing 100190, China;
3. Chinese Academy of Engineering, Beijing 100088, China

Received:2014-10-25 Revised:2015-01-26 Online:2015-04-25 Published:2015-04-04

摘要/Abstract

摘要：

通过分析常规页岩含气量测试所面临的问题,从页岩含气量本质入手,提出了利用绝对吸附量计算含气量的可行性方法。通过假设吸附相体积与比表面积间的关系及孔隙中密度分布最小值与体相密度之间随着压力的变化关系,提出了页岩含气量计算的新方法,并借助简化局部密度函数理论和页岩实测等温吸附曲线实现了页岩含气量的计算。研究发现:简化局部密度函数理论可以精确拟合页岩等温吸附曲线,说明该理论可以有效地描述页岩的吸附特性;利用简化局部密度函数理论及页岩等温吸附曲线可实现页岩含气量的计算,该方法的优势在于基本上能够还原储层温度、压力下气体在页岩中的原始赋存状态。

关键词: 页岩, 含气量, 简化局部密度, 等温吸附, 狭缝

Abstract:

Through analyzing problems of the conventional tests on gas content of shale, a feasible method was proposed to calculate gas content in shale using absolute adsorption. With the assumption of the relation between adsorption phase volume and specific surface area as well as change of the least density distribution and bulk-phase density in pores with pressure, a new method was put forward to calculate the gas content of shale. The gas content of shale was calculated via the simplified local density function theory and the adsorption isotherm of shale. Results indicate that the simplified local density function theory can be used to precisely fit the adsorption isotherm of shale. This method presents an advantage in basically restoring the original occurrence state of gas in shale under reservoir temperature and pressure.

Key words: shale, gas content, simplified local density, isothermal adsorption, slit

中图分类号:

TE311

左罗, 王玉普, 熊伟, 郭为, 高树生, 胡志明, 沈瑞. 页岩含气量计算新方法[J]. 石油学报, 2015, 36(4): 469-474,481.

Zuo Luo, Wang Yupu, Xiong Wei, Guo Wei, Gao Shusheng, Hu Zhiming, Shen Rui. A new method to calculate the shale gas content[J]. Acta Petrolei Sinica, 2015, 36(4): 469-474,481.

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页岩含气量计算新方法

A new method to calculate the shale gas content

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