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Publication . Article . 2019

Experimental Study on the Impact of Thermal Maturity on Shale Microstructures Using Hydrous Pyrolysis

Kouqi Liu; Mehdi Ostadhassan; Paul C. Hackley; Thomas Gentzis; Jie Zou; Yujie Yuan; Humberto Carvajal-Ortiz; +2 Authors
Closed Access
Published: 25 Sep 2019 Journal: Energy & Fuels, volume 33, pages 9,702-9,719 (issn: 0887-0624, eissn: 1520-5029, Copyright policy )
Publisher: American Chemical Society (ACS)
Abstract

Hydrous pyrolysis was applied to four low-maturity aliquots from the Utica, Excello, Monterey, and Niobrara Shale Formations in North America to create artificial maturation sequences, which could be used to study the impact of maturation on geochemical and microstructural properties. Modified Rock-Eval pyrolysis, reflectance, organic petrology, and Fourier transform infrared spectroscopy (FTIR) were employed to analyze their geochemical properties, while gas adsorption (CO2 and N2) was used to characterize their pore structures (pores < 200 nm). Organic petrography using white and blue light (fluorescence) before and after hydrous pyrolysis showed that amorphous organic matter cracked into solid bitumen, oil, and gas during hydrous pyrolysis. A reduction of the CH2/CH3 ratio in hydrous pyrolysis residues was observed from FTIR analysis. Rock-Eval pyrolysis showed that kerogens in the four samples were dissimilar, and hydrous pyrolysis residues showed smaller hydrogen index and Sh2 values than starting ma...

Subjects by Vocabulary

Microsoft Academic Graph classification: Organic matter chemistry.chemical_classification chemistry Petrography Pyrolysis Hydrous pyrolysis Materials science Fourier transform infrared spectroscopy Oil shale Amorphous solid Chemical engineering Adsorption

Subjects

Energy Engineering and Power Technology, Fuel Technology, General Chemical Engineering

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