DIAGENESIS OF NON-MARINE PETROLEUM RESERVOIRS: THE NEOCOMIAN (LOWER CRETACEOUS) SHURIJEH FORMATION, KOPET-DAGH BASIN, NE IRAN
سال
: 1993
چکیده: Detailed petrologic, sedimentologic and geohistory analyses have been carried out on the
Neocomian (Lower Cretaceous) Shurijeh Formation in the eastern part of the Kopet-Dagh Basin, NE
Iran. The results of these analyses show that the diagenetic history of Shurijeh sandstones was
affected by their depositional settings, and the subsequent subsidence of these units through meteoric
and compactional hydrologic regimes in this part of the Kopet-Dagh Basin. These rocks consist
mostly of sub-litharenitic redbeds deposited during a regressive phase of sedimentation dominated by
rapid siliciclastic sediment supply. The lower and middle portions of the interval studied were
deposited in low-sinuosity braided fluvial systems, and the upper portion was deposited in highsinuosity
meandering systems.
The porous and permeable sand-rich units were partially filled by infiltrated clays, and early
calcite, anhydrite and silica cements as they subsided through the meteoric regime. In the
compactional regime, feldspars altered to clays, dolomite replaced calcite and penetrated authigenic
silica, and a late-stage of calcite cementation and replacement took place. These diagenetic events
were followed by partial dissolution of early and late-stage calcite cements that created secondary
porosity in the sandstone units. During the late Miocene—early Pliocene (approximately 10 million
years), the Late Alpine Orogeny resulted in the formation of structural traps in the Shurijeh
Formation of the Sarakhs area. This was followed by migration of gas into the porous units of this
formation, accounting for the Khangiran and Gonbadli gasfields.
Relationships revealed in this study can be used to develop diagenetic models that will help
predict diagenetic styles in dominantly non-marine sandstones in other basins similar to the Kopet-
Dagh of Iran
Neocomian (Lower Cretaceous) Shurijeh Formation in the eastern part of the Kopet-Dagh Basin, NE
Iran. The results of these analyses show that the diagenetic history of Shurijeh sandstones was
affected by their depositional settings, and the subsequent subsidence of these units through meteoric
and compactional hydrologic regimes in this part of the Kopet-Dagh Basin. These rocks consist
mostly of sub-litharenitic redbeds deposited during a regressive phase of sedimentation dominated by
rapid siliciclastic sediment supply. The lower and middle portions of the interval studied were
deposited in low-sinuosity braided fluvial systems, and the upper portion was deposited in highsinuosity
meandering systems.
The porous and permeable sand-rich units were partially filled by infiltrated clays, and early
calcite, anhydrite and silica cements as they subsided through the meteoric regime. In the
compactional regime, feldspars altered to clays, dolomite replaced calcite and penetrated authigenic
silica, and a late-stage of calcite cementation and replacement took place. These diagenetic events
were followed by partial dissolution of early and late-stage calcite cements that created secondary
porosity in the sandstone units. During the late Miocene—early Pliocene (approximately 10 million
years), the Late Alpine Orogeny resulted in the formation of structural traps in the Shurijeh
Formation of the Sarakhs area. This was followed by migration of gas into the porous units of this
formation, accounting for the Khangiran and Gonbadli gasfields.
Relationships revealed in this study can be used to develop diagenetic models that will help
predict diagenetic styles in dominantly non-marine sandstones in other basins similar to the Kopet-
Dagh of Iran
کلیدواژه(گان): ِDiagenesis,Kopet-dagh,Cretaceous
کالکشن
:
-
آمار بازدید
DIAGENESIS OF NON-MARINE PETROLEUM RESERVOIRS: THE NEOCOMIAN (LOWER CRETACEOUS) SHURIJEH FORMATION, KOPET-DAGH BASIN, NE IRAN
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| contributor author | سیدرضا موسوی حرمی | en |
| contributor author | R. L. Brenner | en |
| contributor author | Sayyed Reza Moussavi Harami | fa |
| date accessioned | 2020-06-06T14:33:04Z | |
| date available | 2020-06-06T14:33:04Z | |
| date issued | 1993 | |
| identifier uri | http://libsearch.um.ac.ir:80/fum/handle/fum/3401481 | |
| description abstract | Detailed petrologic, sedimentologic and geohistory analyses have been carried out on the Neocomian (Lower Cretaceous) Shurijeh Formation in the eastern part of the Kopet-Dagh Basin, NE Iran. The results of these analyses show that the diagenetic history of Shurijeh sandstones was affected by their depositional settings, and the subsequent subsidence of these units through meteoric and compactional hydrologic regimes in this part of the Kopet-Dagh Basin. These rocks consist mostly of sub-litharenitic redbeds deposited during a regressive phase of sedimentation dominated by rapid siliciclastic sediment supply. The lower and middle portions of the interval studied were deposited in low-sinuosity braided fluvial systems, and the upper portion was deposited in highsinuosity meandering systems. The porous and permeable sand-rich units were partially filled by infiltrated clays, and early calcite, anhydrite and silica cements as they subsided through the meteoric regime. In the compactional regime, feldspars altered to clays, dolomite replaced calcite and penetrated authigenic silica, and a late-stage of calcite cementation and replacement took place. These diagenetic events were followed by partial dissolution of early and late-stage calcite cements that created secondary porosity in the sandstone units. During the late Miocene—early Pliocene (approximately 10 million years), the Late Alpine Orogeny resulted in the formation of structural traps in the Shurijeh Formation of the Sarakhs area. This was followed by migration of gas into the porous units of this formation, accounting for the Khangiran and Gonbadli gasfields. Relationships revealed in this study can be used to develop diagenetic models that will help predict diagenetic styles in dominantly non-marine sandstones in other basins similar to the Kopet- Dagh of Iran | en |
| language | English | |
| title | DIAGENESIS OF NON-MARINE PETROLEUM RESERVOIRS: THE NEOCOMIAN (LOWER CRETACEOUS) SHURIJEH FORMATION, KOPET-DAGH BASIN, NE IRAN | en |
| type | Journal Paper | |
| contenttype | External Fulltext | |
| subject keywords | ِDiagenesis | en |
| subject keywords | Kopet-dagh | en |
| subject keywords | Cretaceous | en |
| journal title | journal of petroleum geology | en |
| journal title | Journal of Petroleum Geology | fa |
| pages | 55-72 | |
| journal volume | 16 | |
| journal issue | 1 | |
| identifier link | https://profdoc.um.ac.ir/paper-abstract-1018101.html | |
| identifier articleid | 1018101 |