Reference

The arguments against the biogenic origin of oil, specifically concerning the Athabasca Oil Sands, include:

1. Lack of Pore Space: As depth increases within rocks, the lack of available pore space challenges the biogenic theory, as it becomes increasingly difficult for hydrocarbons to migrate through such tight formations Wikipedia.

2. Metal Distribution: The distribution of metals in crude oil is claimed to fit better with an abiogenic origin rather than a biogenic one, suggesting that these elements might originate from deep within the Earth's mantle SPE Connect.

3. Reservoir Heterogeneity: The impact of reservoir heterogeneity on oil migration and the origin of oil sands is complex, and this complexity can be used as an argument against a simple biogenic origin for the Athabasca Oil Sands ScienceDirect.

4. Historical Record of PAHs: A study presenting a century-long historical record of source apportionment of polycyclic aromatic hydrocarbons (PAHs) in dated sediments from the Athabasca region could provide insights into the origin of these hydrocarbons, which may not align with a solely biogenic origin ACS Publications.

5. Contamination Source Differentiation: The differentiation of petrogenic, pyrogenic, and biogenic hydrocarbons in environmental samples from the Athabasca Oil Sands region indicates that hydrocarbon contamination can have multiple sources, not all of which are biogenic ResearchGate.

6. Gas Ruptures During Earthquakes: Incidental evidence such as gas ruptures during earthquakes is more likely to be sourced from biogenic methane generated in unconsolidated sediments near the surface, which could argue against a deep abiogenic source Bionity.

These arguments present a challenge to the biogenic theory of oil origin, suggesting that the Athabasca Oil Sands may have a more complex origin involving both biogenic and abiogenic processes.