Characterisation of the Mid-Cretaceous Mishrif Reservoir of the Southern Mesopotamian Basin, Iraq

Aqrawi, Adnan A.M.; Mahdi, Thamer A.; Sherwani, Govand H.; Horbury, Andrew D.

doi:10.3997/2214-4609-pdb.248.104

Cited by 35 publications

(54 citation statements)

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“…15). Aqrawi et al (2010) identified three erosional disconformities from sequence stratigraphic studies of the Mesopotamian Basin (SE Iraq) (Fig. 15); and van Buchem et al (2002b) reported these disconformities in a study of the Natih Formation, Oman.…”

Section: (Ii) Middle Turonian Disconformitymentioning

confidence: 98%

“…In the Middle Cretaceous and later, the occurrence of these palaeo-structures in the Dezful Embayment led to important lateral changes in the sedimentological, palaeontological and geochemical characteristics of synchronous carbonate deposits. Tectonic activity and high frequency sea-level fluctuations led to recurring phases of emergence in SW Iran, and the development of disconformities in the Cenomanian -Santonian Sarvak-Ilam Formations (Blanc et al, 2003;Emami et al, 2010;Verges et al, 2009;Sharp et al, 2010;Aqrawi et al, 2010;Razin et al, 2010;Hollis, 2011;Rahimpour-Bonab et al, 2012a and b;Mehrabi and Rahimpour-Bonab, 2013) (Fig. 2).…”

Section: Geological Setting and Stratigraphymentioning

confidence: 99%

“…While the mid-Cenomanian and mid-Turonian disconformities can be traced regionally over the Arabian Platform, the C-T disconformity occurs inconsistently (Alsharhan et al, 1986(Alsharhan et al, , 1988Motiei, 1993;Aqrawi et al, 1998Aqrawi et al, , 2010. As pointed out in previous studies (James and Wynd, 1965;Setudehnia, 1978;Murris, 1980;Koop and Stoneley, 1982;Sharland et al, 2001;Casini et al, 2011;Hollis, 2011;van Buchem et al, 2011), this unconformity formed in response to the uplift associated with ophiolite obduction on the NE margin of the Arabian Plate.…”

Section: Geological Setting and Stratigraphymentioning

confidence: 99%

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Palaeo‐exposure Surfaces in Cenomanian – Santonian Carbonate Reservoirs in the Dezful Embayment, Sw Iran

Rahimpour‐Bonab

Mehrabi

Navidtalab

et al. 2013

Journal of Petroleum Geology

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Cretaceous carbonates host major hydrocarbon reserves in SW Iran and elsewhere in the Arabian Plate. Tectonic activity combined with eustatic sea-level changes resulted in periodic exposure of these carbonates which were subsequently modified by meteoric diagenesis under a warm and humid climate. Long-term exposure led to the formation of several disconformity surfaces within the middle Cretaceous succession which had important effects on the interval's reservoir characteristics. These disconformity surfaces in the Dezful Embayment were investigated using microfacies, diagenetic and geochemical studies at five subsurface sections. Facies differences across these boundaries, together with features such as karstification, palaeosol development and collapse-dissolution breccias, were used to identify emergent surfaces. Stable oxygen and carbon isotope ratios and trace element profiles indicate intense meteoric diagenesis. Disconformities were dated using biostratigraphic studies. The results indicate the presence of two major erosional disconformities: one is located at the Cenomanian -Turonian boundary separating the middle Sarvak Formation from its upper part; and the other is in the mid-Turonian at the boundary between the Sarvak and Ilam Formations. The latter disconformity is correlatable throughout the Arabian Plate.

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Section: (Ii) Middle Turonian Disconformitymentioning

confidence: 98%

Section: Geological Setting and Stratigraphymentioning

confidence: 99%

Section: Geological Setting and Stratigraphymentioning

confidence: 99%

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Palaeo‐exposure Surfaces in Cenomanian – Santonian Carbonate Reservoirs in the Dezful Embayment, Sw Iran

Rahimpour‐Bonab

Mehrabi

Navidtalab

et al. 2013

Journal of Petroleum Geology

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“…The influence of these tectonically induced features are reflected in the sedimentary successions in the area both as particular sedimentary facies and as the several unconformities which are associated with significant diagenetic events (Rahimpour-Bonab et al, 2012). For example, the combined effects of sea-level fluctuations, salt diapirism and movement on basement blocks in the Cenomanian-Turonian resulted in three phases of emergence dated as mid-Cenomanian, late Cenomanian -early Turonian, and mid-Turonian, respectively (Blanc et al 2003;Emami et al 2010;Verges et al 2009;Aqrawi et al, 2010;Sharp et al, 2010;Razin et al, 2010;Hollis, 2011). The mid-Cenomanian and mid-Turonian phases of emergence can be recognized in terms of regional-scale disconformities (Alsharhan and Nairn, 1986;Alsharhan and Nairn, 1988;Motiei, 1993;Aqrawi, 1998;Aqrawi et al, 2010).…”

Section: At-4mentioning

confidence: 99%

“…For example, the combined effects of sea-level fluctuations, salt diapirism and movement on basement blocks in the Cenomanian-Turonian resulted in three phases of emergence dated as mid-Cenomanian, late Cenomanian -early Turonian, and mid-Turonian, respectively (Blanc et al 2003;Emami et al 2010;Verges et al 2009;Aqrawi et al, 2010;Sharp et al, 2010;Razin et al, 2010;Hollis, 2011). The mid-Cenomanian and mid-Turonian phases of emergence can be recognized in terms of regional-scale disconformities (Alsharhan and Nairn, 1986;Alsharhan and Nairn, 1988;Motiei, 1993;Aqrawi, 1998;Aqrawi et al, 2010). However, the Cenomanian-Turonian phase is restricted to SW Iran and the Mesopotamian Basin Aqrawi et al, 2010, Rahimpour-Bonab et al, 2012.…”

Section: At-4mentioning

confidence: 99%

FLOW UNIT DISTRIBUTION AND RESERVOIR MODELLING IN CRETACEOUS CARBONATES OF THE SARVAK FORMATION, ABTEYMOUR OILFIELD, DEZFUL EMBAYMENT, SW IRAN

Rahimpour‐Bonab

Mehrabi

Navidtalab

et al. 2012

Journal of Petroleum Geology

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Carbonate sediments within the Mid-Cretaceous Sarvak Formation form an important reservoir at the Abteymour oilfield in the western Dezful Embayment, SW Iran. The poroperm characteristics of this reservoir were controlled by factors including deposition under tropical climatic conditions and early diagenesis, repeated phases of subaerial exposure due to local, regional and global-scale tectonism, and diagenetic modification during burial. From microfacies analysis, the Sarvak Formation carbonates in the Abteymour field were interpreted in a previous study as having been deposited on a homoclinal ramp-type platform. Three third-order sequences were recognized in the middle Cenomanian to middle Turonian part of the formation. The reservoir quality of the carbonates was enhanced both by dissolution (comprising separate phases of eogenetic and telogenetic meteoric dissolution) and dolomitization (especially styloliterelated dolomitization).In this paper, a rock/pore type approach was used in order to integrate petrophysical data with facies and diagenetic models within a sequence stratigraphic framework. Two different rock-typing methods for the determination of flow units were considered. Hydraulic flow units (HFUs) were identified firstly using flow zone indicators and secondly using a stratigraphic modified Lorenz plot. The flow units resulting from these two methods are compared, and their close correspondence within the sequence stratigraphic framework is discussed. In addition, the previously-used large-scale reservoir zonation scheme for the Abteymour field is correlated with the defined flow units, and four new Integrated Reservoir Zones are introduced. By integrating geological information with petrophysical parameters (including porosity, permeability and saturation) within a sequence stratigraphic framework, field-scale variations and controls on reservoir quality are described.

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Spatial Modeling of Hydrocarbon Productivity in the Nahr Umr Formation at the Luhais Oil Field, Southern Iraq

et al. 2020

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Characterisation of the Mid-Cretaceous Mishrif Reservoir of the Southern Mesopotamian Basin, Iraq

Cited by 35 publications

References 0 publications

Palaeo‐exposure Surfaces in Cenomanian – Santonian Carbonate Reservoirs in the Dezful Embayment, Sw Iran

Palaeo‐exposure Surfaces in Cenomanian – Santonian Carbonate Reservoirs in the Dezful Embayment, Sw Iran

FLOW UNIT DISTRIBUTION AND RESERVOIR MODELLING IN CRETACEOUS CARBONATES OF THE SARVAK FORMATION, ABTEYMOUR OILFIELD, DEZFUL EMBAYMENT, SW IRAN

Spatial Modeling of Hydrocarbon Productivity in the Nahr Umr Formation at the Luhais Oil Field, Southern Iraq

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