Meteoric Water Incursion, Crude Oil Degradation and Calcite Cementation of an Upper Cretaceous Reservoir in the Zagros Foreland Basin (Kurdistan Region of Iraq)
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F23%3A73620602" target="_blank" >RIV/61989592:15310/23:73620602 - isvavai.cz</a>
Result on the web
<a href="https://www.mdpi.com/2073-4441/15/10/1953" target="_blank" >https://www.mdpi.com/2073-4441/15/10/1953</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3390/w15101953" target="_blank" >10.3390/w15101953</a>
Alternative languages
Result language
angličtina
Original language name
Meteoric Water Incursion, Crude Oil Degradation and Calcite Cementation of an Upper Cretaceous Reservoir in the Zagros Foreland Basin (Kurdistan Region of Iraq)
Original language description
Field observations, together with the results of gas chromatography-mass spectrometry (GC-MS) and stable carbon isotope analysis of bitumen, coupled with fluid inclusion microthermometry and stable isotope analyses of closely associated vug- and fracture-filling columnar calcite in the Upper Cretaceous Bekhme Formation, Kurdistan Region of Iraq, suggest that the degradation of crude oil was caused by the regional incursion of meteoric waters. This incursion, which is interpreted to have occurred during tectonic uplift during the Zagros Orogeny, is evidenced by: (i) the depletion of n-alkanes and acyclic isoprenoid alkanes (pristane and phytane) in the bitumen; (ii) low delta C-13(VPDB) values (-8.5 parts per thousand to -3.9 parts per thousand) and delta O-18(VPDB) values (-22.9 parts per thousand to -15.0 parts per thousand), with more radiogenic Sr isotopic ratios (0.70771-0.70772) compared to Cretaceous seawater; and (iii) low salinity and low temperatures (20 to 40 degrees C) in fluid inclusions of the columnar calcite. This study demonstrates that regional meteoric water incursion into sedimentary basins can be linked to crude oil degradation accompanied by calcite cementation events in carbonate reservoirs.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10505 - Geology
Result continuities
Project
—
Continuities
N - Vyzkumna aktivita podporovana z neverejnych zdroju
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Water
ISSN
2073-4441
e-ISSN
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Volume of the periodical
15
Issue of the periodical within the volume
10
Country of publishing house
CH - SWITZERLAND
Number of pages
16
Pages from-to
"1953-1"-"1953-16"
UT code for WoS article
000997540300001
EID of the result in the Scopus database
2-s2.0-85160636041