Differential Thermal Evolution between Oil and Source Rocks in the Carboniferous Shale Reservoir of the Qaidam Basin, NW China

نویسندگان

چکیده

Shale oil and source rock samples of the Carboniferous Keluke Formation from well Chaiye 2 in Delingha Depression were analyzed by gas chromatography–mass spectrometry. Source rocks highly mature at generation stage with vitrinite reflectance (Ro) 1.45–1.88%. However, produced shale reservoir was characterized abundant biomarkers but low abundance diamondoid hydrocarbons estimated Ro ca. 0.78%, indicating still a relatively thermal maturity level. As crude generated accumulated autochthonously, preliminary results indicate that witnessed differential evolution significant disparity current due to rapid tectonic subsidence clay mineral catalysts accelerated maturation process. Although uplifts occurred afterwards, recorded highest have ever reached, whereas has not reached same level less impact alteration or catalysis than reservoir. Such discovery enlarges hydrocarbon perseveration ranges reservoirs, particularly for unconventional tight formation, benefits potential exploration sediments.

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ژورنال

عنوان ژورنال: Energies

سال: 2021

ISSN: ['1996-1073']

DOI: https://doi.org/10.3390/en14217088