Multi-scale Real Gas Transport in Shale Matrix

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dc.contributor.advisorChen, Zhangxing (John)
dc.contributor.authorXu, Jinze
dc.contributor.committeememberChen, Shengnan
dc.contributor.committeememberLu, Qingye
dc.contributor.committeememberYin, Shunde
dc.contributor.committeememberCheng, Y. Frank
dc.date2018-06
dc.date.accessioned2018-03-06T16:11:31Z
dc.date.available2018-03-06T16:11:31Z
dc.date.issued2018-03-05
dc.description.abstractAs one of the clean energy resources, shale gas significantly reduces greenhouse gas emissions. The description of the gas transport behavior in shale rocks is one of the numerous challenges for further studies on economically developing shale gas reservoirs. In this work, real gas transport in the multi-scale porous structure of shale matrix is studied. Three models are, respectively, built at scales of single pores, a dual-porosity shale rock and a shale gas reservoir. These models are well validated with experimental, simulation and field data. Results indicate that increasing a taper ratio and an aspect ratio weakens a real gas effect and lowers bulk gas transport, including viscous flow and Knudsen diffusion, while the surface diffusion conductance first increases and decreases afterwards. More tortuous and complex pores weak the dominancy of the shale matrix in a dual-porosity shale rock. Transport conductance owns negative relationships with fractal dimensions of pore size and tortuosity of shale matrix, and positive relationship with minimum pore size. Gas production is underestimated without considering nano-scale pore size distribution-based gas transport mechanisms. A higher fractal dimension of a pore size and a higher variance result in higher cumulative gas production and lower sensitivity of gas production to a nano-scale pore size distribution.en_US
dc.identifier.citationXu, J. (2018). Multi-scale Real Gas Transport in Shale Matrix (Doctoral thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/13061en_US
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/13061
dc.identifier.urihttp://hdl.handle.net/1880/106416
dc.language.isoeng
dc.publisher.facultyGraduate Studies
dc.publisher.facultySchulich School of Engineering
dc.publisher.institutionUniversity of Calgaryen
dc.publisher.placeCalgaryen
dc.rightsUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.
dc.subjectshale gas
dc.subjectnanopore
dc.subjectEnergy
dc.subject.classificationEngineering--Petroleumen_US
dc.titleMulti-scale Real Gas Transport in Shale Matrix
dc.typedoctoral thesis
thesis.degree.disciplineChemical and Petroleum Engineering
thesis.degree.grantorUniversity of Calgary
thesis.degree.nameDoctor of Philosophy (PhD)
ucalgary.item.requestcopytrue
ucalgary.thesis.checklistI confirm that I have submitted all of the required forms to Faculty of Graduate Studies.en_US
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