نشریه علوم زمین خوارزمی

نشریه علوم زمین خوارزمی

ارتباط سکانس‌های رسوبی و فرآیندهای دیاژنتیکی با زون‌های مخزنی سازند آسماری در یکی از میادین نفتی جنوب غرب ایران

نویسندگان
قباد کولابندی 1
حسین مصدق 1
جواد هنرمند 2
مهران مرادپور 2
1 دانشگاه خوارزمی
2 پژوهشگاه صنعت نفت
10.22034/KJES.2023.9.1.106202
چکیده
سـازند آسـماری بـه سـن الیگوسـن- میوسـن یکی از مهم‌تریـن سـنگ مخـزن‌های هیدروکربنی در حوضه رسوبی زاگرس به ویژه فروافتادگی دزفول است. این سازند در بیشتر میادین نفتی فروافتادگی دزفول از توالی مخلوط کربناته- آواری تشکیل شده است. در این مطالعه جهت بررسی ارتباط سکانس‌های رسوبی و فرآیند‌های دیاژنتیکی با زون‌های مخزنی، از داده‌های رسوب‌شناسی و لاگ‌های پتروفیزیکی مربوط به یک چاه کلیدی استفاده شده است. براساس مطالعات میکروسکوپی مقاطع نازک تهیه شده از مغزه، 8 ریزرخساره کربناته و 4پتروفاسیس آواری که ‌در‌ چهار ‌محیط ‌دریای‌ باز، ‌پشته‌های زیر آبی، ‌لاگون ‌و‌ پهنه جزرومدی ‌در‌ یک ‌رمپ کربناته‌ هم‌شیب‌‌ نهشته‌ شده‌اند،‌ شناسایی‌گردید. همچنین با تجزیه و تحلیل رخساره‌ها و با استفاده از لاگ‌های چاه‌پیمایی، 6 سکانس رسوبی مرتبه سوم شناسایی شد. از بین فرآیندهــای دیاژنــزی موثر بر این سازند انحــلال و دولومیتی‌شــدن با گسترش فضای خالی باعث افزایش خواص مخزنی و سیمانی شدن و تراکم باعث کاهش خواص مخزنی شده‌اند. سازند آسماری در چاه مورد مطالعه براساس مشخصات رسوبی و خواص پتروفیزیکی به 8 زون مخزنی تقسیم شده است. تطابق مرزهای دسته رخساره‌ای با مرز‌های زون‌های مخزنی در بیشتر موارد نشان می‌دهد که تغییرات خواص مخزنی بیشتر در ارتباط با تغییرات سطح آب دریا‌‌ است. این مطلب در زون‌های پایینی به خوبی مشخص است.

کلیدواژه‌ها
سکانس رسوبی
فرایند‌های دیاژنتیکی
زون‌های مخزنی
سازند آسماری

عنوان مقاله English

Relationship between sedimentary sequences and diagenetic processes with the reservoir zones of the Asmari Formation in one of the oil fields in the southwest of Iran

نویسندگان English

Ghobad kulabandy 1
Hossein Mosaddegh 1
Javad Honarmand 2
Merhran Moradpour 2
چکیده English

The Oligo-Miocene Asmari Formation is one of the most important hydrocarbon reservoirs in the Zagros sedimentary basin, especially in the Dezful depression. The Formation in most of the oil fields of the Dezful depression consists of a mixed carbonate-siliciclastic sequence. In this study, the relationship between sedimentary sequences and diagenetic processes with reservoir zones is considered. For this purpose, sedimentological data and petrophysical logs of a key well were used. Based on microscopic studies on the core thin sections, four detrital petrofacies and eight carbonate microfacies were identified that were deposited in four facies belts, including open marine, shoal, lagoon, and tidal flat environments, related to a homoclinal ramp. In addition, six depositional sequences (third order) were identified by facies analysis and well logs. Reservoir properties have been increased by dissolution and dolomitization with pore space expansion, while being decreased by cementation and compaction. The Asmari Formation in the investigated well is subdivided into eight reservoir zones based on sedimentary characteristics and petrophysical properties. The coincidence of the facies boundaries with the reservoir zone boundaries in most cases shows that the changes in the reservoir properties are mainly related to the changes in the sea level. This is well-known in the lower zones

کلیدواژه‌ها English

Sedimentary sequence
Diagenetic processes
Reservoir zones
Asmari formation
Adams, T.D., Bourgeois, F., 1967. Asmari biostratigraphy. Iranian Oil Operating Companies, Geological and Exploration Division, Unpublished Report, (1074), 6-11.
Alavi, M., 2004. Regional stratigraphy of the Zagros fold-thrust belt of Iran and its proforeland evolution. American Journal of Science, 304, 1–20.
Allahkarampour Dill, M., Seyrafian, A., Vaziri-Moghaddam, H., 2010. The Asmari Formation, north of the Gachsaran (Dill anticline), southwest Iran: facies analysis, depositional environments and sequence stratigraphy. Carbonates Evaporites 25 (2), 145–160.
Amin Rasouli, H., Lasemi, Y., Zahiri, Sh., 2019. Facies and Depositional Environments of Terrigenous Deposits of the Asmari Formation, in the Aghajari Well No. 61, Scientific Semiannual Journal Sedimentary Facies 3 (2), 1-18.
Aqrawi, A.A.M., Keramati, M., Ehrenberg, N., Pickard, N., Mollemi, A., Svana, T., Darke, G., Dickson, J.A.D., Oxtoby, N.H, 2006. The origin of dolomite in the Asmari Formation Oligocene-Lower Miocene, Dezful Embayment. SW, Iran. Journal of Petroleum Geology, 29 (4), 381-402.
Avarjani, S., 2014. Sequence stratigraphy and investigation of reservoir quality of Asmari Formation in North Dezful depression (Marun, Kopal, Haftkal oil fields), Zagros Basin, southwest of Iran, PhD thesis of Ferdowsi University of Mashhad, (In Persian).
Burchette, T.P., Wright, V.P., 1992. Carbonate Ramp Depositional Systems. Sedimentary Geology, 79, 3-57.
Catuneanu, O., Galloway, W.E., Kendall, C.G.S.C., Miall, A.D., Posamentier, H.W., Strasser, A. Tucker, M.E., 2011. Sequence stratigraphy: methodology and nomenclature. Newsletters on stratigraphy, 44(30),173-245.
Daraei, M., Amini, A. Ansari, M., 2015. Facies analysis and depositional environment study of the mixed carbonate–evaporite Asmari Formation (Oligo-Miocene) in the sequence stratigraphic framework, NW Zagros, Iran. Carbonates and Evaporites, 30(3), 253-272.
Dunham, R.J., 1962. Classification of carbonate rocks according to their depositional texture. In: Ham, W.E. (Ed.), Classification of Carbonate Rocks. AAPG Memoir 1, 108–121.
El Tabakh, M., Schreiber, B.C., Warren, J. K., 1998. Origin of fibrous gypsum in the -Newark Rift Basin, Eastern North America, Journal of Sedimentary Research 68(1),88-99.
Emery, D., Myers, K.J. 1996. Sequence Stratigraphy. Blackwell Science, Oxford.
Flugel, E., 2010. Microfacies of Carbonate Rocks, Analysis, Interpretation and Application (2th edition), Springer, Heidelberg.
Folk, R.L., 1980. Petrology of Sedimentary Rocks. Hemphill, Austin, Texas.
Gholipour A.M., Haggi A. 1989: Geological study of layers 4 and 5 of the Asmari Formation. NISOC, report No 4135.
Goudarzi, M., Vahidinia, M., Amiri Bakhtiar, H., Norainejad, M. 2020. Biostratigraphy, microfacies and depositional environment of the Asmari Formation in one of the wells of the Maroon oil field and its comparison with other areas of Zagros, Sedimentary Facies, 20(2) 226-253, (In Persian).
Hanarmand, J., 2012. Investigating sedimentology and diagenesis factors controlling the reservoir quality of the Asmari formation in Cheshmekhosh field, PhD thesis, Tehran University, (In Persian).
Honarmand, J., Amini, A., 2016. Diagenetic processes and reservoir properties in the ooid grainstones of the Asmari Formation, Cheshmeh Khush Oil Field, SW Iran. Journal of Petroleum Science and Engineering, 81, 70-79.
Intera, E.C.L., Petroleum Technologies Ltd. 1992. Marun Field study, Phase 2, Reservoir characterization, Geophysics. Intera Petroleum Production Division, Calgary, Canada.
James, G.A., Wynd, J.G., 1965. Stratigraphic Nomenclature of Iranian Oil Consortium Agreement Area. AAPG Bulletin, 49, 2182-2245.
Khalili, A., Vaziri-Moghaddam, H., Arian, M., Seyrafian, A., 2021. Carbonate platform evolution of the Asmari Formation in the east of Dezful Embayment, Zagros Basin, SW Iran, Journal of African Earth Sciences,181, 1-15.
Laursen, G.V., Monibi, S., Allan, T.L., Pickard, N.A.H., Hosseiney, A., Vincent, B., Hamon, Y., Van Buchem, F.S.H., Moallemi, A. and Driullion, G., 2009. The Asmari Formation Revisited: Changed Stratigraphic Allocation and New Biozonation. 1st International Petroleum Conference & Exhibition, Shiraz, 1-5.
Lucia, F.J., 2007. Carbonate Reservoir Characterization, Springer-Verlag, Berlin, Heidelberg.
Moore, C.H., Wade, W. J., 2013. Carbonate Reservoirs: Porosity and Diagenesis in a Sequence Stratigraphic Framework, Elsevier, Amsterdam.
Morad, S., Ketzer, M., Fernando De Ros, L., 2013. Linking Diagenesis to Sequence Stratigraphy, Special Publication Number 45 of the International Association of Sedimentologists.
Motiei H., 1993. Treatise on geology of Iran, stratigraphy of Zagros. Geological Survey of Iran, Tehran.
Neisi, A., Ghaderi, A., Ghobishabi, A., Allah Karampour-Dil, M., 2016. Biostratigraphy, microfacies examination and stratigraphy of the Asmari Formation (with the help of cyclolog software) in the Qaleh-Nar oil field, Zagros Basin. Iranian Journal of Petroleum Geology,12, 44-22.
Omoboriowo, A.O., Chiadikobi, K.C., Chiaghanam, O.I., 2012. Depositional Environment and Petrophysical Characteristics of" LEPA" Reservoir, Amma Field, Eastern Niger Delta, Nigeria. International Journal of Pure and Applied Sciences and Technology, 10(2), 38-61.
Pettijohn, F.J., Potter, P.E., Siever, R., 1987, Sand and Sandstone (2nd ed.), Berlin, Springer Verlag.
Pomar, L., 2001. Types of carbonate platforms: a genetic approach. Basin Research, 13(3), 313 – 334.
Rowlands, G., Purkis, S., Bruckner, A., 2014. Diversity in the geomorphology of shallow-water carbonate depositional systems in the Saudi Arabian Red Sea. Geomorphology, 222, 3-13.
Tucker, M.E., Wright, V.P., 1990. Carbonate Sedimentology. Blackwell Science.
Tucker, M.E., 2001. Sedimentary Petrology: An introduction to the origin of sedimentary rock. Blackwell Scientific Publication, England.
Van Buchem, F.S.P., Allan, T.L., Laursen, G.V., Lotfpour, M., Moallemi, A., Monibi, S., Motiei, H., Pickard, N.A.H., Tahmasbi, A.R., Vedrenne, V., Vincent, B., 2010. Regional stratigraphic architecture and reservoir types of the Oligo-Miocene deposits in the Dezful Embayment (Asmari and Pabdeh Formations) SW Iran. Geological Society of London, Special Publications, 329(1), 219-263.
Wilson, J.L. 1975. Carbonate Facies in Geologic History. Springer-Verlag, New York.