Hydrocarbon generation from Carboniferous-Permian coaly source rocks in the Huanghua depression under different geological processes

Autor:	Jin-Jun Xu, Qiang Jin
Rok vydání:	2020
Předmět:	Permian 020209 energy Geochemistry Energy Engineering and Power Technology 02 engineering and technology 010502 geochemistry & geophysics 01 natural sciences Geochemistry and Petrology Natural gas Carboniferous 0202 electrical engineering electronic engineering information engineering 0105 earth and related environmental sciences Maturity (geology) chemistry.chemical_classification Light crude oil business.industry Fossil fuel Geology Geotechnical Engineering and Engineering Geology Geophysics Fuel Technology Hydrocarbon Source rock chemistry Economic Geology business
Zdroj:	Petroleum Science. 17:1540-1555
ISSN:	1995-8226 1672-5107
Popis:	Natural gas and condensate derived from Carboniferous-Permian (C-P) coaly source rocks discovered in the Dagang Oilfield in the Bohai Bay Basin (east China) have important implications for the potential exploration of C-P coaly source rocks. This study analyzed the secondary, tertiary, and dynamic characteristics of hydrocarbon generation in order to predict the hydrocarbon potentials of different exploration areas in the Dagang Oilfield. The results indicated that C-P oil and gas were generated from coaly source rocks by secondary or tertiary hydrocarbon generation and characterized by notably different hydrocarbon products and generation dynamics. Secondary hydrocarbon generation was completed when the maturity reached vitrinite reflectance (Ro) of 0.7%–0.9% before uplift prior to the Eocene. Tertiary hydrocarbon generation from the source rocks was limited in deep buried sags in the Oligocene, where the products consisted of light oil and gas. The activation energies for secondary and tertiary hydrocarbon generation were 260–280 kJ/mol and 300–330 kJ/mol, respectively, indicating that each instance of hydrocarbon generation required higher temperature or deeper burial than the previous instance. Locations with secondary or tertiary hydrocarbon generation from C-P coaly source rocks were interpreted as potential oil and gas exploration regions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d696a968751914da5929a30a90a7d92d https://doi.org/10.1007/s12182-020-00513-2 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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