化工进展2017，Vol.36Issue(5)：1690-1697,8.DOI:10.16085/j.issn.1000-6613.2017.05.018
页岩容量法和重量法等温吸附实验对比研究
Comparative study on the volumetric and gravimetric method for isothermal adsorption experiment of shale
摘要
Abstract
Shale gas content is one key parameter to accurately evaluate the gas content and the resource potentiality of shale gas reservoir,and it is usually determined by isothermal adsorption experiments which mainly include volumetric method and gravimetric method. The volumetric method is commonly used in isothermal adsorption experiments,but the application of the gravimetric method is rarely. The adsorption capacities tested by volumetric and gravimetric method are excess adsorption, and the absolute adsorption can't be directly tested by experiments. And then the conversion relationship of the excess absorption and absolute adsorption is established. In order to compare the accuracy and stability of the two methods,the two isothermal adsorption experiments of same sample are performed respectively. The test results show that the adsorption curve is a type I adsorption curve at low pressure,but when the pressure is further increased,the isothermal adsorption curve will decrease. There is an inevitable downward trend of the isothermal adsorption curve at high pressure, which is not an abnormal phenomenon,but is the essential characteristic of excess adsorption capacity of supercritical methane. Comparative analysis show that the isothermal adsorption experiment based on the gravimetric method is less sensitive to experimental environment and parameters than the volumetric method. Especially for shale of lower adsorption capacity,the error caused by the volumetric method is greater than the gravimetric method. Under the existing technical level,the gravimetric method is more suitable for the isothermal adsorption experiment of shale.关键词
页岩气/容量法/重量法/等温吸附/过剩吸附量Key words
shale gas/volumetric method/gravimetric method/isothermal adsorption/excess adsorption分类
能源科技引用本文复制引用
周尚文,李奇,薛华庆,郭伟,李晓波,卢斌..页岩容量法和重量法等温吸附实验对比研究[J].化工进展,2017,36(5):1690-1697,8.基金项目
国家重点基础研究发展计划项目(2013CB2281). （2013CB2281）
