Application of pore type tomography in reconstructing carbonate reservoirs evolution, Kangan and Dalan formations in the Central Part of the Persian Gulf

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SAJADI F.; TAVAKOLI V.; SFIDARI E.; Emami Niri m.

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Journal Paper

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Journal: Iranian Journal of Geology Year:2021 | Volume:15 | Issue:59 Page(s): 13-28

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Information Journal Paper

Title

Application of pore type tomography in reconstructing carbonate reservoirs evolution, Kangan and Dalan formations in the Central Part of the Persian Gulf

Author(s)

SAJADI F. | TAVAKOLI V. | SFIDARI E. | Emami Niri m. | Issue Writer Certificate

Keywords

Dense sectionQ1

KanganQ1

DalanQ1

Velocity deviation modelQ1

Velocity deviation log (VDL)Q1

Abstract

In this study, the velocity deviation log was derived from routine wireline logs to determine the pore types of Kangan and Dalan carbonate formations in one of the central Persian Gulf fields. To achieve this purpose, core information from one well including porosity and permeability and petrography of thin sections along with wireline logs from 12 other wells were used. By using a velocity deviation log reconstruction based on density, neutron and acoustic logs, three velocity zones representing distinct porosity and one nonporous zone were identified. The three-dimensional model of velocity deviation log showed that K1 zone is mainly a dense and non-porous zone and, in some cases, it contains moldic and rarely intercrystaline porosity. This porosity was created due to sea-level fall during deposition of the upper part of this unit because of dissolution and dolomitization. K2 reservoir zone contains major intercrystaline and minor moldic porosities due to dolomitization in shallow sea-level conditions in most parts of this unit. Unit K3 mainly hosts dense and nonporous rocks, in cases moldic porosity and also randomly shows fractures in its lower part. K4 is more likely contain intercrystaline and interparticle porosities at the upper part which was deposited in a shallow environment. Moldic porosities were formed in lower parts in response to meteoric diagenetic environment. Fractures are also detected in some cases. The results of presented study show high correlation with other reservoir evaluations that prove the ability of Velocity deviation modeling in predicting large-scale reservoir variations.

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APA: Copy

SAJADI, F., TAVAKOLI, V., SFIDARI, E., & Emami Niri, m.. (2021). Application of pore type tomography in reconstructing carbonate reservoirs evolution, Kangan and Dalan formations in the Central Part of the Persian Gulf. IRANIAN JOURNAL OF GEOLOGY, 15(59 ), 13-28. SID. https://sid.ir/paper/413458/en

Vancouver: Copy

SAJADI F., TAVAKOLI V., SFIDARI E., Emami Niri m.. Application of pore type tomography in reconstructing carbonate reservoirs evolution, Kangan and Dalan formations in the Central Part of the Persian Gulf. IRANIAN JOURNAL OF GEOLOGY[Internet]. 2021;15(59 ):13-28. Available from: https://sid.ir/paper/413458/en

IEEE: Copy

F. SAJADI, V. TAVAKOLI, E. SFIDARI, and m. Emami Niri, “Application of pore type tomography in reconstructing carbonate reservoirs evolution, Kangan and Dalan formations in the Central Part of the Persian Gulf,” IRANIAN JOURNAL OF GEOLOGY, vol. 15, no. 59 , pp. 13–28, 2021, [Online]. Available: https://sid.ir/paper/413458/en

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