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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

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • 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

  • 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