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dc.contributor.authorLiu, K.
dc.contributor.authorOstadhassan, M.
dc.contributor.authorZou, Jie
dc.contributor.authorGentzis, T.
dc.contributor.authorRezaee, M. Reza
dc.contributor.authorBubach, B.
dc.contributor.authorCarvajal-Ortiz, H.
dc.identifier.citationLiu, K. and Ostadhassan, M. and Zou, J. and Gentzis, T. and Rezaee, M.R. and Bubach, B. and Carvajal-Ortiz, H. 2018. Multifractal analysis of gas adsorption isotherms for pore structure characterization of the Bakken Shale. Fuel. 219: pp. 296-311.

Understanding pore heterogeneity can enable us to obtain a deeper insight into the flow and transport processes in any porous medium. In this study, multifractal analysis was employed to analyze gas adsorption isotherms (CO 2 and N 2 ) for pore structure characterization in both a source (Upper-Lower Bakken) and a reservoir rock (Middle Bakken). For this purpose, detected micropores from CO 2 adsorption isotherms and meso-macropores from N 2 adsorption isotherms were analyzed separately. The results showed that the generalized dimensions derived from CO 2 and the N 2 adsorption isotherms decrease as q increases, demonstrating a multifractal behavior followed by f(a) curves of all pores exhibiting a very strong asymmetry shape. Samples from the Middle Bakken demonstrated the smallest average H value and largest average a 10- -a 10+ for micropores while samples from the Upper Bakken depicted the highest average a 10- -a 10+ for the meso-macropores. This indicated that the Middle Bakken and the Upper Bakken have the largest micropore and meso-macropore heterogeneity, respectively. The impact of rock composition on pore structures showed that organic matter could increase the micropore connectivity and reduce micropore heterogeneity. Also, organic matter will reduce meso-macropore connectivity and increase meso-macropore heterogeneity. We were not able to establish a robust relationship between maturity and pore heterogeneity of the source rock samples from the Bakken.

dc.publisherElsevier Ltd
dc.titleMultifractal analysis of gas adsorption isotherms for pore structure characterization of the Bakken Shale
dc.typeJournal Article
curtin.departmentWASM: Minerals, Energy and Chemical Engineering (WASM-MECE)
curtin.accessStatusOpen access

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