Bacterial degradation of crude oil: Comparison of field and experimental data

Bailey, N.J.L.; Jobson, A.; Rogers, Michael A.

doi:10.1016/0009-2541(73)90017-x

Cited by 254 publications

(59 citation statements)

References 5 publications

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“…and they tend to be the major components of biodegraded crude oils (Bailey et al, 1973). Since asphaltenes have not been found in most of the Guafita and La Victoria wells, then oil biodegradation does not seem to be the main process involved in the origin in situ of A-like magnetic anomalies (Díaz et al, 2000).…”

Section: Rock Magnetic Epr and Eom Results Frommentioning

confidence: 99%

Hydrocarbon-induced magnetic contrasts in some Venezuelan and Colombian oil wells

et al. 2006

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In this work we present a review of our current research on the subject of near-surface hydrocarbon-induced magnetic contrasts. Samples are drill cuttings from number of Venezuelan and Colombian oil fields, and some soils from an oil prospective area. Results from rock magnetic, electronic paramagnetic resonance (EPR), extractable organic matter (EOM) and scanning electron microscopy (SEM) are discussed in light of new experiments. Two types of magnetic susceptibility (MS) anomalies have been recognized in oil well samples (i.e. A and B-like). A-like anomalies are probably associated to a reducing environment caused by the underlying reservoirs, whereas B-like anomalies might reflect lithological contrasts. Samples from A-like anomalous levels reveal the restrictive presence of authigenic spherical aggregates of submicronic Fe-rich magnetic crystals. Peaks of organic matter free radical concentration (OMFRC) and EOM are also observed at depth levels that lie close to those with A-like anomalies. Hysteresis ratios J rs /J s and H cr /H c could be used as additional criteria to recognize A-like magnetic contrasts. In soil samples, MS and OMFRC anomalies coincide with peaks of ethane concentration and an area underneath where source rock has reached appropriate conditions of pressure and temperature to generate hydrocarbons (Cretaceous kitchen). Different types of crude oils and subsurface structures could have also a direct effect on the observed amplitude of A-like anomalies.

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Section: Rock Magnetic Epr and Eom Results Frommentioning

confidence: 99%

Hydrocarbon-induced magnetic contrasts in some Venezuelan and Colombian oil wells

et al. 2006

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“…Dahl and Speers, 1986;Karlsen et al, 1995;Leythaeuser and Rückheim, 1989;Tissot and Welte, 1984). A number of studies, devoted to understanding the reasons and consequences of diversities in petroleum composition, have already been undertaken long ago (Bailey et al, 1973a;Bailey et al, 1973b;Dahl and Speers, 1986;Espach and Fry, 1951;Evans et al, 1971;Hirschberg, 1988;Hunt, 1979;Justwan and Dahl, 2005;Karlsen et al, 1995;Karlsen and Skeie, 2006;Milner et al, 1977;Sage and Lacey, 1939;Tissot and Welte, 1984;Tyson, 1995). These studies have revealed that the factors that cause heterogeneities in petroleum composition in reservoirs can roughly be related to 1) variations in source rock organic facies and source rock maturity and 2) secondary alteration processes.…”

Section: 2mentioning

confidence: 99%

“…Migrated and reservoired petroleum is prone to additional alteration effects (Bailey et al, 1973a;Bailey et al, 1973b;Evans et al, 1971;Larter and Aplin, 1995;Tissot and Welte, 1984) because, in addition to facies and source rock maturation, a number of post-depositional 6 processes (secondary alteration processes) modify the petroleum during expulsion, migration and also in the reservoir.…”

Section: 2mentioning

confidence: 99%

Thermal maturity, hydrocarbon potential and kerogen type of some Triassic–Lower Cretaceous sediments from the SW Barents Sea and Svalbard

Abay

Karlsen

Pedersen

et al. 2017

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Rock-Eval and total organic carbon (TOC) analyses of 144 samples representing Triassic–Lower Cretaceous intervals from the SW Barents Sea (the Svalis Dome, the Nordkapp and Hammerfest basins, and the Bjarmeland Platform) and Svalbard demonstrate lateral variations in source rock properties. Good to excellent source rocks are present in the Lower–Middle Triassic Botneheia and Steinkobbe, and Upper Jurassic Hekkingen formations, 1 – 7 wt% and 6 – 19 wt% TOC, respectively. Hydrogen indices of 298 – 609 mg HC/g TOC in the Botneheia Formation from Svalbard, and 197 – 540 mg HC/g TOC in the Steinkobbe Formation of Svalis Dome suggest Type II (oil-prone) and Type II/III (oil/gas-prone) kerogens, respectively. The Kobbe Formation (Botneheia/Steinkobbe-equivalent) is organic-lean and generally gas-prone (Type III kerogen) on the Bjarmeland Platform and in the Nordkapp Basin, and is a good source rock with Type III/II kerogen in the Hammerfest Basin. In the investigated wells, the Hekkingen Formation is more oil-prone on the Bjarmeland Platform than in the Nordkapp Basin, while Lower Cretaceous samples have poor potential for oil. Upper Triassic samples show potential mainly for gas; however, coal/coaly-shale samples in well 7430/07-U-01 (Bjarmeland Platform) are oil/gas-prone. Most samples analysed are immature to early mature; thus, the variation in petroleum potential and kerogen type is a function of organic facies rather than maturity levels.

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“…Work with pure cultures has shown that oil degraders only slowly degrade certain xylene (dimethybenzene) isomers and highly branched alkanes because of ster;c hindrances inhibiting the ability of the bacterial oxygenases to attack the compounds (Bailey et al 1973;Hopper 1978). The p-and m-xylenes were readily degraded by pure cultures but o-xylene was only slowly degraded.…”

Section: Discussionmentioning

confidence: 99%

Hydrocarbon Degradation Potential in Reference Soils and Soils Contaminated with Jet Fuel

Lee

Hoeppel²

1991

In Situ Bioreclamation

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Bacterial degradation of crude oil: Comparison of field and experimental data

Cited by 254 publications

References 5 publications

Hydrocarbon-induced magnetic contrasts in some Venezuelan and Colombian oil wells

Hydrocarbon-induced magnetic contrasts in some Venezuelan and Colombian oil wells

Thermal maturity, hydrocarbon potential and kerogen type of some Triassic–Lower Cretaceous sediments from the SW Barents Sea and Svalbard

Hydrocarbon Degradation Potential in Reference Soils and Soils Contaminated with Jet Fuel

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