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Experimental study and isotherm models of water vapor adsorption in shale rocks
Shen WJ(沈伟军); Li XZ; Lu XB(鲁晓兵); Guo W; Zhou SW; Wan YJ
2018-02
发表期刊Journal of Natural Gas Science and Engineering
卷号52页码:484-491
ISSN1875-5100
摘要

he understanding of water vapor adsorption and equilibrium in the low permeability matrix of gas shale is crucial for predicting and optimizing gas productivity in shale gas reservoirs. In this study, water vapor adsorption isotherms for gas shale samples from the Lower Silurian Longmaxi Formation in Southern China were measured gravimetrically at two temperatures (30 degrees C and 50 degrees C) under the relative humidity ranging from 11.1% to 97.0%, and four different isotherm models were used to fit the experimental data and to analyze water vapor adsorption on shale rocks. The experimental results showed that water vapor adsorption for shale rocks followed a typeIIsigmoid shape over the humidity range. At the lower humidity range, the monolayer-multilayer adsorption was the dominant process while capillary condensation and temperature effects became significant with relative humidity increasing. As the amount of total organic carbon increases, water adsorption weakens while calcite has an inhibitory effect. Through quantifying the average relative error (ARE), coefficient of determination (R-2) and chi-square (chi(2)) of the isotherm models relative to data, the GAB isotherm model was identified to be the best-fitting isotherm to describe the water adsorption process in shale rocks. Moreover, the FHH plot was used to analyze and distinguish the states of water retention by adsorption and capillary condensation.

关键词Water Adsorption Shale Rocks Isotherm Models Monolayer-multilayer Adsorption Capillary Condensation Water Retention
DOIdoi.org/10.1016/j.jngse.2018.02.002
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收录类别SCI ; EI
语种英语
WOS记录号WOS:000432092600039
关键词[WOS]SURFACE-AREA ; SORPTION ISOTHERMS ; CALCITE SURFACE ; METAL-IONS ; GAS ; CARBON ; HUMIDITY ; METHANE ; SYSTEMS
WOS研究方向Energy & Fuels ; Engineering
WOS类目Energy & Fuels ; Engineering, Chemical
项目资助者National Science and Technology Major Project of the Ministry of Science and Technology of China Project(50150503-12 ; Project of PetroChina Research Institute of Petroleum Exploration Development(RIPED-LFFY-2017-JS-118) ; Youth Foundation of Key Laboratory for Mechanics in Fluid Solid Coupling Systems, Chinese Academy of Sciences ; 2016ZX05037006)
课题组名称LMFS海洋土力学(LHO)
论文分区二类
力学所作者排名1
引用统计
文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/72245
专题流固耦合系统力学重点实验室
通讯作者Shen WJ(沈伟军)
作者单位1.Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
2.PetroChina Research Institute of Petroleum Exploration and Development, Langfang 065007, China
推荐引用方式
GB/T 7714
Shen WJ,Li XZ,Lu XB,et al. Experimental study and isotherm models of water vapor adsorption in shale rocks[J]. Journal of Natural Gas Science and Engineering,2018,52:484-491.
APA Shen WJ,Li XZ,Lu XB,Guo W,Zhou SW,&Wan YJ.(2018).Experimental study and isotherm models of water vapor adsorption in shale rocks.Journal of Natural Gas Science and Engineering,52,484-491.
MLA Shen WJ,et al."Experimental study and isotherm models of water vapor adsorption in shale rocks".Journal of Natural Gas Science and Engineering 52(2018):484-491.
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