Biostratigraphy, microfacies, and reservoir quality of the Oligocene Qom Formation (Kharzan Section, north-west of Ardestan, central Iran)

Arani, Asma Aftabi; Ashouri, Ali Reza; Daneshian, Jahanbakhsh; Ghaderi, Abbas; Wood, David A.

doi:10.7306/gq.1693

Artykuł - szczegóły

Tytuł artykułu

Biostratigraphy, microfacies, and reservoir quality of the Oligocene Qom Formation (Kharzan Section, north-west of Ardestan, central Iran)

Autorzy

Arani Asma Aftabi , Ashouri Ali Reza , Daneshian Jahanbakhsh , Ghaderi Abbas , Wood David A.

Treść / Zawartość

Pełne teksty:

Arani_A.A_Biostratigraphy_GQ_Vo. 67_No. 3_2023.pdf

Pobierz

Identyfikatory

DOI

10.7306/gq.1693

Warianty tytułu

Języki publikacji

Abstrakty

The central Iran Basin is a region with unique environmental characteristics in which the Late Paleogene–Early Neogene benthic foraminifera display distinctive distributions and abundances that can assist in identifying the intervals with the best reservoir potential. Lipidocyclinid and miogypsinid zonal marker taxa in this region can be correlated with those in the SBZ23 region (European Basin), indicating an Oligocene (Chattian) age. With sedimentation of continental strata of the Upper Red Formation following the marine succession of the Qom Formation, it seems that the last Tethyan marine transgression in the Ardestan region in central Iran occurred in the Oligocene, and the Tethyan seaway was permanently closed during the Miocene. Seven carbonate microfacies and marl or silty marl facies were identified in the study area based on field investigations, textural analysis and faunal assemblages. These microfacies were deposited on an open-shelf carbonate platform in lagoonal, patch-reef, and open-marine belts that effectively define both inner and middle-shelf environments. Micritization, cementation, mechanical and chemical compaction, dissolution and fracturing are the most important diagenetic processes controlling reservoir quality in the Qom Formation. The investigation of these processes in the facies of the Qom formation in the Kharzan section revealed that intervals associated with shallow lagoonal depositional environments display better reservoir quality than other formation intervals, due to dissolution and fracturing.

Słowa kluczowe

Oligocene benthic foraminifera sedimentary environment reservoir quality Qom Formation central Iran

Wydawca

Państwowy Instytut Geologiczny - Państwowy Instytut Badawczy

Czasopismo

Geological Quarterly

Rocznik

2023

Tom

Vol. 67, No. 3

Strony

art. no. 23

Opis fizyczny

Bibliogr. 82 poz., fot., rys., tab., wykr.

Twórcy

autor

Arani Asma Aftabi

Ferdowsi University of Mashhad, Department of Geology, Faculty of Science, Mashhad, Iran

https://orcid.org/0009-0005-6345-7686

autor

Ashouri Ali Reza

Ferdowsi University of Mashhad, Department of Geology, Faculty of Science, Mashhad, Iran

https://orcid.org/0000-0002-2913-4913

autor

Daneshian Jahanbakhsh

Kharazmi University of Tehran, Department of Geology, Faculty of Science, Tehran, Iran

https://orcid.org/0000-0001-5503-1216

autor

Ghaderi Abbas

aghaderi@um.ac.ir

Ferdowsi University of Mashhad, Department of Geology, Faculty of Science, Mashhad, Iran

https://orcid.org/0000-0001-9404-7827

autor

Wood David A.

DWA Energy Limited, Lincoln, UK

https://orcid.org/0000-0003-3202-4069

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