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Oxygenic Asphaltenization/Kerogenization of Methanol-Soluble Fraction of Asphaltic Crudes: the La Luna Formation (Venezuela)

Author:

Premovic, Pavle I.

Category:

Research Papers

Sub-Category:

Chemistry

Language:

English

Date Published:

July 19, 2022

File:

/Research Papers-Chemistry/Download/8450

Downloads:

212

Keywords:

Polar fraction, asphaltenes, kerogen, crude, La Luna, oxygen.

Abstract:

The (non-volatile) methanol-soluble fraction isolated from DMO-118, a typical asphaltic crude from the La Luna formation, was heated at 200 °C in the presence of the air oxygen (O2) for periods 0.5 to 10 hours. In the first stage heating yields the asphaltenes-like product similar to the DMO-118 asphaltenes. In the later stage heating generates the kerogen-like material similar to the kerogens isolated from the La Luna (QM) source rocks. We used a Fourier Transform Infrared (FTIR) spectroscopy to compare these artificial and natural materials. Kerogenization follows the first order consecutive reaction kinetics with the asphaltenes-like product as an intermediate. Similar oxygenic kerogenization was observed for other asphaltic DMO crudes as well as non-asphaltic DM crudes of the La Luna formation.