Lithofacies, diagenesis and cyclicity of the ‘Lower Member’ of the Khuff Formation (Late Permian), Al Qasim Province, Saudi Arabia

Khalifa, M.A.

doi:10.1016/j.jseaes.2004.05.008

Cited by 41 publications

(15 citation statements)

References 35 publications

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“…Rare skeletal grains and absence of subaerial exposure fabrics are indicative of limited circulation with high salinity. This facies illuminates gradual transition of intertidal settings to lagoonal environments [34]. This facies is developed in protected lagoon environment with moderate water circulation [6].…”

Section: Facies B1 (Peloid Packstone)mentioning

confidence: 99%

Facies, Sedimentary Environment and Sequence Stratigraphy of Dalan Formation in South Fars, Iran —(Qatar-South Fars Arch) Well ASL-A

Rezavand¹,

Jahani²,

Asilian³

2016

OJG

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Dalan Formation is one of the most important gas reservoirs of south and southwest Iran which it belongs to Dehram Group and its age is Middle to Late Permian. The Dalan formation is interpreted as reflecting a major tectono-eustatic event related to the onset of rapid thermal subsidence of the early Neo-Tethys passive margin in Arabia and Iran, and the drowning of its rift shoulders. The Dalan formation consists mainly of medium to thick-bedded oolitic to micritic shallow-marine carbonate, with intercalations of evaporates. This formation overlies the Faraghan formation and extends up into the Lower Triassic kangan formation. The current paper is focused on the facies, sedimentary environment and sequence Stratigraphy study of the Middle to Upper Permian Dalan formation in the West Assaluyeh gas field the subsurface section of well ASL-A. Based on microfacies analysis and significant founa and flora, nineteen major facies in five facies associations including Tidal flat (A), Lagoon (B), Shoal (C), Open marine (D) and Mid ramp (E) were recognized in the Dalan formation. Facies analysis and those comparisons with modern and ancient environments indicated that the Dalan formation was deposited inner to mid parts of a homoclinal ramp. The sequence stratigraphy studies on the Dalan formation in this gas field led to assessment of seven main sedimentary sequences of the third-order in the Assaluyeh field, well ASL-A. The boundary between the third-order sequences with the Faraghan formation and between the Nar and Upper Dalan members are Subaerial Unconformity (SU) and the boundaries between the third-order sequences with each other and also with the Kangan formation are Correlative Conformity (CC). The main diagenetic processes in this formation are dolomitization, dissolution, anhydritization, cementation and compaction which played a significant role in improving reservoir quality. The shoal ooid grainstone facies with intergranular and oomoldic porosity * Corresponding author. N. Rezavand et al. 945 comprise the main reservoir facies of the Dalan formation.

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Section: Facies B1 (Peloid Packstone)mentioning

confidence: 99%

Facies, Sedimentary Environment and Sequence Stratigraphy of Dalan Formation in South Fars, Iran —(Qatar-South Fars Arch) Well ASL-A

Rezavand¹,

Jahani²,

Asilian³

2016

OJG

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“…In the northern Arabian Plate, the Permian-Triassic succession is dominated by a thick shallow-marine carbonate-evaporite succession developed on the northern passive margin of Gondwana (Edgell, 1996;Pillevuit, 1993;Sharland et al, 2001) which in general shows a stratiform or "layer-cake" geometry (Insalaco et al, 2006;Alsharhan et al, 2006;Ehrenberg et al, 2007;Koehrer et al, 2010Koehrer et al, , 2012Zeller et al, 2011). Powers et al, 1966;Sharland et al, 2001;Khalifa, 2005) In Iran, this succession is referred to as the Dalan and Kangan Formations (Fig. 2) which are stratigraphic equivalents of the Khuff Formation in areas to the south (Alsharhan, 2006).…”

Section: Geological Setting and Stratigraphymentioning

confidence: 99%

Flow Unit Characterisation in the Permian‐triassic Carbonate Reservoir Succession at South Pars Gasfield, Offshore Iran

Enayati-Bidgoli

Rahimpour‐Bonab

Mehrabi

2014

Journal of Petroleum Geology

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The South Pars gasfield (offshore southern Iran) has been investigated in detail in recent studies in terms of depositional, diagenetic and reservoir properties of the Permian-Triassic carbonate succession. In the present paper, a variety of flow unit approaches were applied to identify reservoir (flow) and non-reservoir (baffle or barrier) units within the Permian-Triassic carbonates. The zonation scheme was based on three approaches; (i) flow units were identified using the stratigraphic modified Lorenz plot (SMLP) method; (ii) hydraulic flow units were identified using a parameter known as the flow zone indicator (FZI); and (iii) petrophysical flow units (PFUs) were determined using the pore throat radius (R 35 ) and water saturation (S w ) parameters. Studies of flow units at both macro-and micro-scales showed that flow properties were controlled by both depositional and diagenetic features. In order to construct a reservoir flow model, the flow units and PFUs were correlated between the four wells studied within a sequence stratigraphic framework. SMLP-derived flow units appeared to be distributed homogenously within the reservoir succession resulting in a layer-cake architecture. By contrast, the FZI-derived hydraulic flow units drew attention to the presence of small-scale heterogeneities within the reservoir. A comparison between these methods showed that the flow model derived from PFUs included greater vertical and horizontal heterogeneities, especially in the Upper Dalan Member (upper K4 reservoir unit). This was due to depositional/diagenetic heterogeneities in both lateral and vertical directions, and the parameters applied in the PFU method. The PFU-derived flow model showed a closer relationship to the actual reservoir performance than the flow units derived by the other methods and can therefore be used as the basis for future dynamic flow simulation.

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“…The tidal shallowing-upward cycles are composed of shallow subtidal facies at the base, capped by intertidal-supratidal facies or composed of intertidal bases and intertidal-supratidal and/or supratidal caps (Khalifa, 2005). The tidal shallowing-upward cycles can be classified into three categories.…”

Section: Tidal Emergence (Shallowing-upward) Cyclesmentioning

confidence: 99%

“…15). The autocyclic mechanism was employed to interpret similar cycles from the lower Member of the Late Permian Khuff Formation from Saudi Arabia (Khalifa, 2005).…”

Section: The Autocyclic Mechanismmentioning

confidence: 99%

Sequence stratigraphy and cyclicity in the Middle Eocene of the Fayoum ranges, Western Desert, Egypt: Implications for regional sea level changes

Ghar

2012

Marine and Petroleum Geology

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Lithofacies, diagenesis and cyclicity of the ‘Lower Member’ of the Khuff Formation (Late Permian), Al Qasim Province, Saudi Arabia

Cited by 41 publications

References 35 publications

Facies, Sedimentary Environment and Sequence Stratigraphy of Dalan Formation in South Fars, Iran —(Qatar-South Fars Arch) Well ASL-A

Facies, Sedimentary Environment and Sequence Stratigraphy of Dalan Formation in South Fars, Iran —(Qatar-South Fars Arch) Well ASL-A

Flow Unit Characterisation in the Permian‐triassic Carbonate Reservoir Succession at South Pars Gasfield, Offshore Iran

Sequence stratigraphy and cyclicity in the Middle Eocene of the Fayoum ranges, Western Desert, Egypt: Implications for regional sea level changes

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