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Chemical compaction features as potential barriers in the Permo-Triassic reservoirs of South Pars Field, southern Iran.

Mehrabi, H. and Mansouri, M. and Rahimpour-Bonab, H. and Tavakoli, V. and Eshraghi, H. (2016):
Chemical compaction features as potential barriers in the Permo-Triassic reservoirs of South Pars Field, southern Iran.
In: Journal of Petroleum Science and Engineering, DOI: 10.1016/j.petrol.2016.03.020, [Article]

Abstract

Chemical compaction features are important diagenetic imprints that generally interrupt reservoir quality in most carbonate reservoirs. In the Permian-Triassic reservoirs of South Pars Field, they are recorded in various types and intensities. High- to low amplitude stylolites and solution seams are concentrated within the K1–K4 units of the upper Dalan and Kangan formations, depending on their facies characteristics, diagenetic alterations and dominant lithology. In these units, there are some meaningful trends between the chemical compaction zones and sequence stratigraphic positions including the systems tracts of third-order sequences. Control of chemical compaction on reservoir characteristics is evaluated by using the results of petrographic studies, petrophysical logs and core poroperm measurements. Internal reservoir architecture of the studied reservoirs is determined using the both hydraulic flow units and stratigraphic modified Lorenz plot approaches. Identified baffle and barrier units show close correspondence with chemically-compacted zones. This indicates that zones with high concentration of stylolites and solution seams can be considered as small-scale vertical flow barriers in the Permian-Triassic reservoirs of South Pars Field.

Item Type: Article
Erschienen: 2016
Creators: Mehrabi, H. and Mansouri, M. and Rahimpour-Bonab, H. and Tavakoli, V. and Eshraghi, H.
Title: Chemical compaction features as potential barriers in the Permo-Triassic reservoirs of South Pars Field, southern Iran.
Language: English
Abstract:

Chemical compaction features are important diagenetic imprints that generally interrupt reservoir quality in most carbonate reservoirs. In the Permian-Triassic reservoirs of South Pars Field, they are recorded in various types and intensities. High- to low amplitude stylolites and solution seams are concentrated within the K1–K4 units of the upper Dalan and Kangan formations, depending on their facies characteristics, diagenetic alterations and dominant lithology. In these units, there are some meaningful trends between the chemical compaction zones and sequence stratigraphic positions including the systems tracts of third-order sequences. Control of chemical compaction on reservoir characteristics is evaluated by using the results of petrographic studies, petrophysical logs and core poroperm measurements. Internal reservoir architecture of the studied reservoirs is determined using the both hydraulic flow units and stratigraphic modified Lorenz plot approaches. Identified baffle and barrier units show close correspondence with chemically-compacted zones. This indicates that zones with high concentration of stylolites and solution seams can be considered as small-scale vertical flow barriers in the Permian-Triassic reservoirs of South Pars Field.

Journal or Publication Title: Journal of Petroleum Science and Engineering
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Earth Science
11 Department of Materials and Earth Sciences > Earth Science > Applied Sedimentary Geology
Date Deposited: 26 Nov 2018 10:51
DOI: 10.1016/j.petrol.2016.03.020
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