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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
Source PublicationJournal of Natural Gas Science and Engineering
2018-02
Volume52Pages:484-491
ISSN1875-5100
Abstract

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.

KeywordWater Adsorption Shale Rocks Isotherm Models Monolayer-multilayer Adsorption Capillary Condensation Water Retention
DOIdoi.org/10.1016/j.jngse.2018.02.002
URL查看原文
Indexed BySCI ; EI
Language英语
WOS IDWOS:000432092600039
WOS KeywordSURFACE-AREA ; SORPTION ISOTHERMS ; CALCITE SURFACE ; METAL-IONS ; GAS ; CARBON ; HUMIDITY ; METHANE ; SYSTEMS
WOS Research AreaEnergy & Fuels ; Engineering
WOS SubjectEnergy & Fuels ; Engineering, Chemical
Funding OrganizationNational 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)
DepartmentLMFS海洋土力学(LHO)
Classification二类
Ranking1
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/72245
Collection流固耦合系统力学重点实验室
Corresponding AuthorShen WJ(沈伟军)
Affiliation1.Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
2.PetroChina Research Institute of Petroleum Exploration and Development, Langfang 065007, China
Recommended Citation
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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