Effect of High Temperature on Physical and Mechanical Properties of Clay Shales (Caprock)

Dovletov, Shamammet

Effect of High Temperature on Physical and Mechanical Properties of Clay Shales (Caprock)

dc.contributor.advisor	Wong, Ron
dc.contributor.author	Dovletov, Shamammet
dc.contributor.committeemember	Khoshnazar, Rahil
dc.contributor.committeemember	Wan, Richard
dc.date	2022-11
dc.date.accessioned	2022-06-20T14:31:32Z
dc.date.available	2022-06-20T14:31:32Z
dc.date.issued	2022-06-03
dc.description.abstract	The complex structure of heavy crude oil and bitumen requires enhanced oil recovery methods such as cyclic steam stimulation and steam-assisted gravity drainage to recover effectively. These methods are operated at high temperature ranges. Thus, it is crucial to understand the effect of high temperatures on such operations. This thesis aimed to investigate the changes in physical and mechanical properties of clay shale caprock due to pre-heating under high temperatures. For this purpose, intact clay shale cores were recovered from a site near Long Lake in Alberta. To investigate the effect of pre-heating on clay shale's strength and deformation characteristics twelve samples were trimmed and prepared. Samples were pre-heated up to 20, 150, 300 and 600 °C and thereafter cooled down to ambient temperature naturally. The variation of mechanical properties of clay samples due to the pre-heating was examined in triaxial compression tests. Changes in the composition and crystalline structure of the clay samples were determined through X-ray fluorescence and X-ray diffraction analysis. The experimental results indicated clay samples becoming stiffer (with increased Young’s modulus and lowered Poisson’s ratio) with increasing temperature. Also, the friction angle and cohesive strength of the clay sample increased with temperature. These findings indicate an increasing trend in the mechanical strength of clay samples with temperature. The failure of the clay samples at low confining pressure was mainly due to shear dilation, while compression was the cause of failure at higher confinement pressure.	en_US
dc.identifier.citation	Dovletov, S. (2022). Effect of High Temperature on Physical and Mechanical Properties of Clay Shales (Caprock) (Master's thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca.	en_US
dc.identifier.doi	http://dx.doi.org/10.11575/PRISM/39846
dc.identifier.uri	http://hdl.handle.net/1880/114762
dc.language.iso	eng	en_US
dc.publisher.faculty	Schulich School of Engineering	en_US
dc.publisher.institution	University of Calgary	en
dc.rights	University 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.	en_US
dc.subject.classification	Engineering	en_US
dc.subject.classification	Engineering--Civil	en_US
dc.subject.classification	Geotechnology	en_US
dc.title	Effect of High Temperature on Physical and Mechanical Properties of Clay Shales (Caprock)	en_US
dc.type	master thesis	en_US
thesis.degree.discipline	Engineering – Civil	en_US
thesis.degree.grantor	University of Calgary	en_US
thesis.degree.name	Master of Science (MSc)	en_US
ucalgary.item.requestcopy	true	en_US