Sedimentary environment, sequence stratigraphy and reservoir characterization of the Kangan Formation in South Pars Gas Field, Iran

Kakemem, Umid; Adabi, Mohammad; Dehyadegari, Ehsan

doi:10.22071/gsj.2019.149728.1551

Document Type : Original Research Paper

Authors

¹ Ph.D. Student, Department of Sedimentary Basins and Petroleum, Faculty of Earth Sciences, Shahid Beheshti University, Tehran, Iran

² Professor, Department of Sedimentary Basins and Petroleum, Faculty of Earth Sciences, Shahid Beheshti University, Tehran, Iran

³ Assistance Professor, Department of Sedimentary Basins and Petroleum, Faculty of Earth Sciences, Shahid Beheshti University, Tehran, Iran

https://doi.org/10.22071/gsj.2019.149728.1551

Abstract

Depositional texture, sedimentary structure and present fauna led to characterize twelve carbonate- evaporate facies. These facies were classified in three facies belts including tidal flat, lagoon and shoal. Developpment of tidal zones together with evaporate deposits and thrombolite facies (signs to a shallow depositional environment), the absence of continuous reef‐frame builders, high production of carbonate mud, absents of calciturbidite, tempestites deposits and slump structures are evidences for a homoclinal carbonate ramp setting. The facies based on petrophysical characteristics which is the results of depositional texture and diagenesis are classified in seven reservoir rock types. In which, the first rock type (RT1) has weak reservoir property and toward RT7 reservoir quality will increase. Facies variation related to sea level fluctuations led to subdivide the whole strata into two 3rd order sequences. Facies stacking patterns in the sequences characterized by subtidal facies (lagoon and shoal) tend to have the most reservoir quality that covered by evaporative (Mf1) and peritidal facies (Mf2 to Mf4) with low-reservoir quality. The most reservoir quality in both K1 and K2 reservoir zones is coincident with late TST, maximum flooding surface (mfs) and late HST in identified depositional sequences which is settled in high-energy shoal facies intervals.

Keywords

20.1001.1.10237429.1399.29.115.7.8

Main Subjects

Sedimentology

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Scientific Quarterly Journal of Geosciences

Sedimentary environment, sequence stratigraphy and reservoir characterization of the Kangan Formation in South Pars Gas Field, Iran

References

References

Volume 29, Issue 115 - Serial Number 115
Volume 29, Serial Number 115, Spring 2020
June 2020
Pages 75-86

Sedimentary environment, sequence stratigraphy and reservoir characterization of the Kangan Formation in South Pars Gas Field, Iran

References

References

Volume 29, Issue 115 - Serial Number 115Volume 29, Serial Number 115, Spring 2020June 2020Pages 75-86

Volume 29, Issue 115 - Serial Number 115
Volume 29, Serial Number 115, Spring 2020
June 2020
Pages 75-86