Application of carboxylic acid biomarkers as indicators of biodegradation and migration of crude oils from the Maracaibo Basin, Western Venezuela

1993 ◽  
Vol 20 (7) ◽  
pp. 973-984 ◽  
Author(s):  
Rudolf Jaffé ◽  
Maria T. Gallardo
Keyword(s):  
Carboxylic Acid ◽  
Crude Oils ◽  
Maracaibo Basin ◽  
And Migration

scholarly journals Unravelling maturity- and migration-related carbazole and phenol distributions in Central Graben crude oils

2018 ◽  
Vol 94 ◽  
pp. 114-130 ◽  
Author(s):  
Volker Ziegs ◽  
Mareike Noah ◽  
Stefanie Poetz ◽  
Brian Horsfield ◽  
Alexander Hartwig ◽  
...  
Keyword(s):  
Crude Oils ◽  
And Migration

RECONSTRUCTING THE GEOLOGICAL HISTORY OF AUSTRALIAN CRUDE OILS USING AROMATIC HYDROCARBONS

2000 ◽  
Vol 40 (1) ◽  
pp. 283 ◽  
Author(s):  
B.G.K. van Aarssen ◽  
R. Alexander ◽  
R.I. Kagi
Keyword(s):  
Thermal Stress ◽  
Crude Oil ◽  
Internal Consistency ◽  
Aromatic Hydrocarbons ◽  
Crude Oils ◽  
Geological History ◽  
History Of ◽  
And Migration

The distributions of methylated naphthalenes in crude oils carry within them detailed information regarding the geological history of the oils. The effects of thermal stress, mixing, biodegradation and migration contamination all leave recognisable imprints, which can be deconvoluted. An extended suite of crude oils from several locations in Australia was analysed for their methylated naphthalene content. It was shown that three ratios of selected isomers, each reflecting the same underlying sedimentary reactions, are linearly related to each other when thermal stress has been the only factor controlling the distribution of methylated naphthalenes. This internal consistency allows for an assessment of maturity independent of source, age and location of the crude oil. When the relationships between the three ratios are not linear, secondary processes such as mixing, biodegradation or migration contamination have affected the crude oil. Close examination of the distribution of methylated naphthalenes can reveal the extent to which either of these processes has affected the oil.

Methylphenanthrene maturity index of marine source rock extracts and crude oils from the Maracaibo Basin

1988 ◽  
Vol 13 (1-3) ◽  
pp. 73-80 ◽  
Author(s):  
Fernando Cassani ◽  
Oswaldo Gallango ◽  
Suhas Talukdar ◽  
Carlos Vallejos ◽  
Ursula Ehrmann
Keyword(s):  
Source Rock ◽  
Maturity Index ◽  
Crude Oils ◽  
Maracaibo Basin ◽  
Marine Source Rock ◽  
Marine Source

Methylphenanthrene maturity index of marine source rock extracts and crude oils from the Maracaibo Basin

1988 ◽  
pp. 73-80 ◽  
Author(s):  
FERNANDO CASSANI ◽  
OSWALDO GALLANGO ◽  
SUHAS TALUKDAR ◽  
CARLOS VALLEJOS ◽  
URSULA EHRMANN
Keyword(s):  
Source Rock ◽  
Maturity Index ◽  
Crude Oils ◽  
Maracaibo Basin ◽  
Marine Source Rock ◽  
Marine Source

Generation and migration of hydrocarbons in the Maracaibo basin, Venezuela: An integrated basin study

1986 ◽  
Vol 10 (1-3) ◽  
pp. 261-279 ◽  
Author(s):  
Suhas Talukdar ◽  
Oswaldo Gallango ◽  
Marcel Chin-A-Lien
Keyword(s):  
Maracaibo Basin ◽  
And Migration

AGE DETERMINATION OF CRUDE OILS IN THE BARROW SUB- BASIN USING PALAEOCLIMATE RELATED VARIATIONS IN HIGHER PLANT BIOMARKERS

1999 ◽  
Vol 39 (1) ◽  
pp. 399
Author(s):  
B.G.K. van Aarssen ◽  
T.P. Bastow ◽  
R ◽  
Alexander ◽  
R.I. Kagi
Keyword(s):  
Source Rock ◽  
Age Groups ◽  
Age Determination ◽  
Source Rocks ◽  
Crude Oils ◽  
Higher Plant ◽  
Sedimentary Sequences ◽  
And Migration ◽  
Oil Source ◽  
Migration Pathways

Variations in higher-plant-derived biomarkers in sedimentary sequences reflect changes in the palaeoclimatic conditions at the time of deposition. It is thought that changes in climate affect the distribution of higher plant populations growing on the hinterland, thus changing the contribution of these plants into the sediments. These variations can be measured using the abundances of three aromatic hydrocarbons: retene, cadalene and iP-iHMN. This was done for a Jurassic sedimentary sequence from the Koolinda–1 well in the Barrow Sub-basin, The obtained profile was related to an absolute time-scale. Measurement of the higher-plant-derived biomarkers in crude oils from the Barrow Sub-basin enabled accurate measurement of the age of their source rocks by using the Koolinda–1 profile as a reference. Most of these oils correlate with the Jurassic W. spectabilis dinoflagellate zone in the Oxfordian. Within this zone the oils fall into four age groups, reflecting four oil-prone intervals each separated by approximately 0.2 My. The oils that have been generated from each group can be found in specific reservoirs in the sub-basin, showing a pattern of migration away from the depocentre with decreasing age of the source rock. This method of determining the source rock age of crude oils enables detailed oil-source rock correlations. On a basin-wide scale it can provide insight into the location of major source rocks and migration pathways.

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