Hydrothermal bitumen generated from sedimentary organic matter of rift lakes – Lake Chapala, Citala Rift, western Mexico

Valle, Pedro F. Zárate-del; Simoneit, Bernd R.T.

doi:10.1016/j.apgeochem.2005.09.001

Cited by 32 publications

(3 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Pr/Ph ratios of the crude oil samples in the study area range from 0.69 to 1.23, implying that the crude oil coming from the source rocks was deposited under anoxic conditions (Didyk et al, 1978;Peters et al, 2005). The crude oil samples in the study area contained a relatively high abundance of βcarotane, suggesting that the source rock was formed in a brackish lagoonal sedimentary environment (Murphy et al, 1967;Didyk et al, 1978;Moldowan et al, 1985;Valle and Simoneit 2005;Peters et al, 2005;Zhang et al, 2015;Ding et al, 2020).…”

Section: Stable Carbon Isotope Composition Of Crude Oilsmentioning

confidence: 95%

Geochemical characteristics and origin of crude oil from Carboniferous volcanic rocks in the Hongche Fault Zone of the Junggar Basin of China

Chen

Wang

et al. 2022

Front. Earth Sci.

View full text Add to dashboard Cite

In recent years, significant advances have been made in the exploration of Carboniferous volcanic reservoirs in the Hongche Fault Zone of the Junggar Basin of China, showing good prospects for further exploration. However, the large variation in the physical properties of crude oil and the complex distribution rule inhibit the one-step exploration. In this study, the PM scale of the biodegradation of crude oil and source of crude oil were studied using experimental methods that target the properties, bulk properties and biomarker compounds of crude oil. The exploration potential of crude oil in this area was analysed, and an accumulation model of crude oil was established. Based on the differences in biomarker compounds and the degree of biodegradation, crude oils were divided into four groups and seven subgroups. Additionally, the analysis of the biomarker compounds of crude oil combined with the hydrocarbon-generation history of source rocks showed that there were at least two periods of oil charging in this area. The first period was the late Triassic, with crude oil derived from the P1f source rock. Owing to the strong tectonic activity during the late Indosinian movement, the oil reservoirs were distributed in the footwall of the fault zone, and the oil in the reservoir exhibited different degrees of biodegradation, forming crude oils of subgroup I1, II and III1. The second period was Cretaceous, during which the P1f source rock was in the natural gas generation stage, and the P2w source rock was at a mature stage. A small part of the crude oil formed by the P2w source rock migrated to the Carboniferous reservoirs and mixed with the crude oil formed by the earlier P1f source rock, resulting in crude oils of subgroups I2, III2, and IV2. The crude oil in the studied area originated from the source rocks in the sag during the peak of oil generation. As tectonic activity approached stability in the latter period, it is speculated that there may be well-preserved primary oil and gas reservoirs in the footwall and slope areas of the fault, making these potential exploration sites.

show abstract

Section: Stable Carbon Isotope Composition Of Crude Oilsmentioning

confidence: 95%

Geochemical characteristics and origin of crude oil from Carboniferous volcanic rocks in the Hongche Fault Zone of the Junggar Basin of China

Chen

Wang

et al. 2022

Front. Earth Sci.

View full text Add to dashboard Cite

show abstract

“…During their path toward the surface the hot fluids could have reacted with the immature organic matter of the late organic rich sediments, probably the Tortonian-early Messinian (Cornamusini et al, 2011), or at least the Santa Croce Unit (see discussion below), to hydrothermally generate hydrocarbons. Hydrothermal generation is known to occurr as a consequence of the interaction between organic matter with high temperature fluids and has been widely documented, both near oceanic spreading centers (Simoneit, 1990) and in continental rift systems (Zárate-Del Valle & Simoneit, 2005). Formation and migration of hydrothermal petroleum is known to occur rapidly (days-years), in a higher temperature range than conventional oils (from about 60 °C to more than 400 °C) and from source rocks with high to very low TOC content (Peter et al, 1991;Simoneit, 1994).…”

Section: A Model For Generation and Migration Of Hydrocarbonsmentioning

confidence: 99%

“…Reservoirs hosted by volcanic rocks are also widespread in geothermal settings where hydrocarbons migrated from nearby source rocks that generated as a consequence of elevated temperature (Peabody, 1993;Schutter, 2003) or by the interaction of organic-rich rocks with hydrothermal fluids (Clifton et al, 1990;Schoell et al, 1990;Simoneit, 1990;Yamanaka et al, 2000;Venkatesan et al, 2003;Zárate-Del Valle & Simoneit, 2005;Zárate-Del Valle et al, 2006;Gurgey et al, 2007;Simoneit et al, 2009;Kontorovich et al, 2011). This phenomenon is often overlooked or underestimated in the geological record due to HC dispersion and/or migration (Parnell, 1988) or because of limited generation.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal generation of hydrocarbons in basement rocks, Southern Tuscany

Schito¹,

Muirhead²,

Bowden³

et al. 2022

IJG

View full text Add to dashboard Cite

Carbonaceous material in the form of graphitic carbon, amorphous carbon and liquid hydrocarbons occurs in the metamorphic rocks of Monti Romani in Southern Tuscany. Raman spectroscopic analyses show a contrast in structural ordering between carbon in the host rocks and carbon films and nodules at the contact with high temperature mineralized veins. Microscopy and gas chromatography additionally indicate liquid hydrocarbons, with a thermal maturity at the peak of the oil window. The association of hydrocarbons with high temperature fluids together with gas chromatographic and spectroscopic data indicate a probable hydrothermal origin of the oils, from the late Miocenic sediments that fill the Tafone Graben. A model is proposed in which hydrocarbons were generated along the fault that borders the Tafone Graben and then migrated toward the basements rocks at the footwall. The presence of 25-norhopane indicates biodegradation in the depth interval between about 100 and 1500 m. The hydrothermal generation of hydrocarbons could occur in other geothermal areas in Southern Tuscany where the presence of hydrocarbons has been reported but never fully explained.

show abstract

Hydrothermal Petroleum

Simoneit¹

2018

Hydrocarbons, Oils and Lipids: Diversity, Origin, Chemistry and Fate

View full text Add to dashboard Cite

Hydrothermal bitumen generated from sedimentary organic matter of rift lakes – Lake Chapala, Citala Rift, western Mexico

Cited by 32 publications

References 16 publications

Geochemical characteristics and origin of crude oil from Carboniferous volcanic rocks in the Hongche Fault Zone of the Junggar Basin of China

Geochemical characteristics and origin of crude oil from Carboniferous volcanic rocks in the Hongche Fault Zone of the Junggar Basin of China

Hydrothermal generation of hydrocarbons in basement rocks, Southern Tuscany

Hydrothermal Petroleum

Contact Info

Product

Resources

About