BIOSTRATIGRAPHY AND MICROFACIES OF THE SARVAK FORMATION IN GACHSARAN OILFIELD (WELL NO. 55)

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RAHIMINEZHAD A.H.; VAZIRI MOGHADAM H.; SEYRAFIAN A.; SAFARI AMR ELAH; AMIRI BAKHTIAR H.

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Journal: RESEARCH JOURNAL OF UNIVERSITY OF ISFAHAN "SCIENCE" Year:2006 | Volume:23 | Issue:1 Page(s): 87-103

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Title

BIOSTRATIGRAPHY AND MICROFACIES OF THE SARVAK FORMATION IN GACHSARAN OILFIELD (WELL NO. 55)

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Keywords

BIOSTRATIGRAPHYQ3

MICROFACIESQ3

SARVAK FORMATIONQ4

FORAMINIFERAQ3

GACHSARAN OILFIELDQ3

Abstract

The SARVAK FORMATION in Gachsaran well No. 55, with 844 meters in thickness was studied through 231 thin sections which led to recognition of 5 genera and 5 species of pelagic microfossils, with 23 genera and 21 species of benthic FORAMINIFERA. Four biozones were recognized as follows: 1- Favusella washitensis range zone; 2- Rudist debris zone; 3- Nezazzata.- alveolinids assemblage zone; and 4- Oligosteginids assemblage zone. As a result, the SARVAK FORMATION at the studied well is Late Albian to Cenomanian in age. This study also indicated that the SARVAK FORMATION conformably rests on the Kazh dumi Formation and disconformably overlain by the Gurpi Formation. Seven MICROFACIES were also identified within the Formation. Based on these MICROFACIES, the SARVAK FORMATION deposited mainly in an open marine, barrier and lagoon sedimentary environments. Also a regressive cycle related to the lower -middle parts and incomplete progressive cycles related to the upper part of the Formation were recognized. Based on the results, the SARVAK FORMATION is deposited in a homoclinal ramp. By considering the frequency of Rudist debris in the studied area and the identified MICROFACIES, it can be interpreted that in well No. 55, the SARVAK FORMATION deposited in a rich oxygenic, shallow marine, and formed in a tropical condition during late Albian- Cenomanian.

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APA: Copy

RAHIMINEZHAD, A.H., VAZIRI MOGHADAM, H., SEYRAFIAN, A., SAFARI, AMR ELAH, & AMIRI BAKHTIAR, H.. (2006). BIOSTRATIGRAPHY AND MICROFACIES OF THE SARVAK FORMATION IN GACHSARAN OILFIELD (WELL NO. 55). RESEARCH JOURNAL OF UNIVERSITY OF ISFAHAN "SCIENCE", 23(1), 87-103. SID. https://sid.ir/paper/55957/en

Vancouver: Copy

RAHIMINEZHAD A.H., VAZIRI MOGHADAM H., SEYRAFIAN A., SAFARI AMR ELAH, AMIRI BAKHTIAR H.. BIOSTRATIGRAPHY AND MICROFACIES OF THE SARVAK FORMATION IN GACHSARAN OILFIELD (WELL NO. 55). RESEARCH JOURNAL OF UNIVERSITY OF ISFAHAN "SCIENCE"[Internet]. 2006;23(1):87-103. Available from: https://sid.ir/paper/55957/en

IEEE: Copy

A.H. RAHIMINEZHAD, H. VAZIRI MOGHADAM, A. SEYRAFIAN, AMR ELAH SAFARI, and H. AMIRI BAKHTIAR, “BIOSTRATIGRAPHY AND MICROFACIES OF THE SARVAK FORMATION IN GACHSARAN OILFIELD (WELL NO. 55),” RESEARCH JOURNAL OF UNIVERSITY OF ISFAHAN "SCIENCE", vol. 23, no. 1, pp. 87–103, 2006, [Online]. Available: https://sid.ir/paper/55957/en

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