富有机质页岩高温高压重量法等温吸附实验

doi:10.7623/syxb201505004

石油学报 ›› 2015, Vol. 36 ›› Issue (5): 557-563.DOI: 10.7623/syxb201505004

富有机质页岩高温高压重量法等温吸附实验

俞凌杰, 范明, 陈红宇, 刘伟新, 张文涛, 徐二社

中国石油化工股份有限公司石油勘探开发研究院无锡石油地质研究所江苏无锡 214151;中国石油化工集团公司油气成藏重点实验室江苏无锡 214126

收稿日期:2014-10-22 修回日期:2015-03-10 出版日期:2015-05-25 发布日期:2015-06-10
通讯作者: 俞凌杰,男,1982年10月生,2005年获中国地质大学(北京)学士学位,2008年获中国科学院硕士学位,现为中国石油化工股份有限公司石油勘探开发研究院无锡石油地质研究所工程师,主要从事石油天然气实验技术研究与分析工作。Email:yulj.syky@sinopec.com
作者简介:俞凌杰,男,1982年10月生,2005年获中国地质大学(北京)学士学位,2008年获中国科学院硕士学位,现为中国石油化工股份有限公司石油勘探开发研究院无锡石油地质研究所工程师,主要从事石油天然气实验技术研究与分析工作。Email:yulj.syky@sinopec.com
基金资助:
国家重点基础研究发展计划(973)项目(2014CB239102)和中国石油化工股份有限公司科技部项目(P12002,P14156)资助。

Isothermal adsorption experiment of organic-rich shale under high temperature and pressure using gravimetric method

Yu Lingjie, Fan Ming, Chen Hongyu, Liu Weixing, Zhang Wentao, Xu Ershe

Wuxi Research Institute of Petroleum Geology, Sinopec Exploration & Production Research Institute, Jiangsu Wuxi 214151, China;Sinopec Key Laboratory of Petroleum Accumulation Mechanisms, Jiangsu Wuxi 214126, China

Received:2014-10-22 Revised:2015-03-10 Online:2015-05-25 Published:2015-06-10

摘要/Abstract

摘要：

借助重量法开展了下志留统龙马溪组富有机质页岩干燥样品在高温高压下的等温吸附实验,实验最高压力25 MPa,最高温度为80℃,观察到高温高压下由于吸附相密度和游离相密度不断变化所导致的过剩吸附量显著下降,并出现高温反转现象。二元Langmuir模型需要通过吸附相密度将过剩吸附量校正为绝对吸附量后才可使用。将吸附相密度作为变量,采用Langmuir三元模型直接对不同温度下的过剩吸附量进行非线性拟合来获取Langmuir参数。研究表明,随着温度升高,Langmuir体积逐渐降低,而Langmuir压力逐渐升高,基于不同温度下的拟合结果建立了温度与Langmuir参数间的关系,可进一步推算埋藏条件下吸附气的变化规律。

关键词: 等温吸附, 重量法, 过剩吸附量, 绝对吸附量, Langmuir三元非线性拟合

Abstract:

With the use of gravimetric method, researches were carried out on isothermal adsorption of the dry samples of organic-rich shale in Longmaxi Formation under high temperature and high pressure. The maximum pressure and temperature were 25 MPa and 80℃ in the experiment respectively. It was observed that the excess adsorption caused by constant change in the densities of adsorbed phase and free phase was significantly declined under high temperature and high pressure, while the reverse phenomenon occurred under high temperature. The binary Langmuir model can be applied until the excess adsorption was corrected and transformed into absolute adsorption. Taking the density of adsorbed phase as a variable and using the ternary Langmuir model, nonlinear fitting was conducted on excess adsorption under different temperatures to obtain the Langmuir parameter. The results showed that with the increase of temperature, Langmuir volume was decreased, while Langmuir pressure was increased gradually. Based on the fitting results under different temperatures, the relationship between temperature and Langmuir parameter was established, so as to predict the variation laws of adsorbed gas under different burial conditions.

Key words: isothermal adsorption, gravimetric method, excess adsorption, absolute adsorption, nonlinear fitting with 3-parameters Langmuir model

中图分类号:

TE133

俞凌杰, 范明, 陈红宇, 刘伟新, 张文涛, 徐二社. 富有机质页岩高温高压重量法等温吸附实验[J]. 石油学报, 2015, 36(5): 557-563.

Yu Lingjie, Fan Ming, Chen Hongyu, Liu Weixing, Zhang Wentao, Xu Ershe. Isothermal adsorption experiment of organic-rich shale under high temperature and pressure using gravimetric method[J]. Acta Petrolei Sinica, 2015, 36(5): 557-563.

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富有机质页岩高温高压重量法等温吸附实验

Isothermal adsorption experiment of organic-rich shale under high temperature and pressure using gravimetric method

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