Sequence Stratigraphy-Based Geological Modeling of Upper Thamama (Lower
Cretaceous) Reservoirs of a Giant Abu Dhabi Oil Field, United Arab Emirates

Strohmenger, Christian J.; Al-Dayyani, Taha; Clark, Andrew L.; Ghani, Ahmed; Hafez, Hafez

doi:10.2523/111401-ms

Cited by 8 publications

(15 citation statements)

References 2 publications

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“…It is overlain by a third-order composite sequence that is bounded on top by a regionally correlative sequence boundary below the Upper Dense Zone/Hawar (top of the Upper Kharaib Reservoir Unit). The two Kharaib third-order composite sequences can be further subdivided into fourteen fourth-order parasequence sets and several fifth-order parasequences (Strohmenger et al, , 2008 Figure 2) that show predominantly aggradational and progradational stacking patterns, typical for greenhouse cycles (Sarg et al 1999). …”

Section: Kharaib and Lower Shuaiba Sequence Stratigraphic Frameworkmentioning

confidence: 99%

“…The Lower Shuaiba Formation corresponds to the late transgressive sequence set (TSS) of the same secondorder supersequence and is built by a third-order composite sequence (base Upper Dense Zone/top Upper Kharaib Reservoir Unit to top Lower Shuaiba Reservoir Unit), subdivided into five fourth-order parasequence sets (Strohmenger et al , 2008Yose et al 2004Yose et al , 2006 Figure 2). …”

Section: Kharaib and Lower Shuaiba Sequence Stratigraphic Frameworkmentioning

confidence: 99%

“…These three dense zones are called Lower Dense Zone (LDZ), Middle Dense Zone (MDZ), and Upper Dense Zone (UDZ). Thickness of the Upper Kharaib Reservoir Unit is between 150 and 170 feet and thickness of the Lower Kharaib Reservoir Unit is approximately 80 feet (Strohmenger et al , 2008.…”

Section: Introductionmentioning

confidence: 99%

“…Thickness of the Lower Shuaiba Reservoir Unit (LSRU) is approximately 55 feet (Strohmenger et al , 2008.…”

Section: Introductionmentioning

confidence: 99%

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High-Resolution Sequence-Stratigraphic Correlation and Facies Characterization of Upper Thamama (Lower Cretaceous) Reservoir Units and Non-Reservoir Zones, Abu Dhabi, United Arab Emirates

et al. 2008

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Platform carbonates of the Lower Cretaceous Kharaib and Lower Shuaiba formations of Abu Dhabi contain three reservoir zones (Lower Kharaib, Upper Kharaib, and Lower Shuaiba Reservoir Units) bounded and separated by low porosity and very low permeability, so-called dense zones (Lower, Middle, and Upper Dense Zones).Thirteen reservoir lithofacies and eight non-reservoir (dense) lithofacies were identified from core. Depositional environments of the three reservoir units range from lower ramp to shoal crest to near-back-shoal. The dense zones were deposited in a restricted shallow-lagoonal setting.The Kharaib and Lower Shuaiba formations are part of the late transgressive sequence set of a second-order supersequence, built by three third-order composite sequences. The three third-order composite sequences are built by twenty fourth-order parasequence sets that show predominantly aggradational and progradational stacking patterns. The parasequence sets are bounded by sequence boundaries, maximum flooding surfaces, and flooding surfaces, which define reservoir sub-units or geological model units. These units are correlatable throughout Abu Dhabi.Within the Kharaib Formation, third-order transgressive systems tracts are formed by mud-dominated, moderate to high porosity but low to moderate permeability carbonates, whereas grain-dominated, high to very high porosity and permeability carbonates occur in third-order highstand systems tracts. The Lower Shuaiba Formation shows a deepening-upward trend during the third-order transgressive systems tract. The overlaying third-order highstand systems tract is dominated by deeper marine mudstone to wackestone facies that shows a subtle shallowingupward trend, as well as an upward increase in grain-richness to skeletal, peloid wackestone to packstone.Thickness and facies changes are minor within one field and only become obvious on a sub-regional and regional view. The established sequence stratigraphic framework and sequence stratigraphy-keyed environment of deposition maps allow a better prediction of the distribution of reservoir rocks throughout the ADCO concession area.

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Section: Kharaib and Lower Shuaiba Sequence Stratigraphic Frameworkmentioning

confidence: 99%

Section: Kharaib and Lower Shuaiba Sequence Stratigraphic Frameworkmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Thickness of the Lower Shuaiba Reservoir Unit (LSRU) is approximately 55 feet (Strohmenger et al , 2008.…”

Section: Introductionmentioning

confidence: 99%

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High-Resolution Sequence-Stratigraphic Correlation and Facies Characterization of Upper Thamama (Lower Cretaceous) Reservoir Units and Non-Reservoir Zones, Abu Dhabi, United Arab Emirates

et al. 2008

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“…Doust & Sumner 2007;Gregory et al 2007;Veeken 2007), their depositional sequences (e.g. Ketzer 2002;Strohmenger et al 2006), and their thermal evolution (e.g. Makhous & Galushkin 2005).…”

mentioning

confidence: 98%

The influence of the provenance of arenite on its diagenesis in the Cameros Rift Basin (Spain)

Arribas¹,

González‐Acebrón²,

Omodeo-Salé³

et al. 2013

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The intraplate Cameros Rift Basin in northern Spain, which has sediments some 6500 m thick, developed between the Late Jurassic and Early Albian. Its facies and their distribution in the sedimentary record suggest the basin may contain hydrocarbon systems. The arenite composition of the basin reveals two main petrofacies: (1) a quartzolithic petrofacies, the provenance of which is related to recycling processes that took place in the pre-rift sedimentary cover; and (2) a quartzofeldspathic petrofacies mainly related to the erosion of a plutonic and metamorphic source of arenite. The succession of these petrofacies reflects two main cycles representing the progressive erosion of their sources, one of 10 Ma, the other of 30 Ma. Such succession is typical of a non-volcanic rift basin. The quartzolithic petrofacies shows early carbonate cements that inhibited compaction and later quartz, feldspar and clay mineral diagenetic phases. The quartzofeldspathic petrofacies has a rigid framework that maintained the original pores of the arenite during burial diagenesis. Quartz and K-feldspar overgrowths are common, with secondary porosity occurring as a product of feldspar dissolution. The quartzofeldspathic petrofacies has a greater potential to act as a hydrocarbon reservoir. This study corroborates the close relationship between the provenance of arenite and its reservoir potential in continental rift basins.

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Disentangling shallow‐water bulk carbonate carbon isotope archives with evidence for multi‐stage diagenesis: An in‐depth component‐specific petrographic and geochemical study from Oman (mid‐Cretaceous)

Huck

Wohlwend

Coimbra

et al. 2017

The Depositional Record

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Disentangling shallow-water bulk carbonate carbon isotope archives into primary and diagenetic components is a notoriously difficult task and even diagenetically screened records often provide chemostratigraphic patterns that significantly differ from global signals. This is mainly caused by the polygenetic nature of shallow-water carbonate substrates, local carbon cycle processes causing considerable neritic-pelagic isotope gradients and the presence of hiatal surfaces resulting in extremely low carbonate preservation rates. Provided here is an in-depth petrographic and geochemical evaluation of different carbonate phases of a mid-Cretaceous (Barremian-Aptian) shallow-water limestone succession (Jabal Madar section) deposited on the tropical Arabian carbonate platform in Oman. The superposition of stable isotope signatures of identified carbonate phases causes a complex and often noisy bulk carbon isotope pattern. Blocky sparite cements filling intergranular pores and bioclastic voids evidence intermediate to (arguably) deep burial diagenetic conditions during their formation, owing to different timing or differential faulting promoting the circulation of fluids from variable sources. In contrast, sparite cements filling sub-vertical veins reveal a rock-buffered diagenetic fluid composition with an intriguing moderate enrichment in 13 C, probably due to fractionation during pressure release in the context of the Miocene exhumation of the carbonate platform under study. The presence of abundant, replacive dedolomite in mudsupported limestone samples forced negative carbon and oxygen isotope changes that are either associated with the thermal breakdown of organic matter in the deep burial realm or the expulsion of buried meteoric water in the intermediate burial realm. Notwithstanding the documented stratigraphically variable and often facies-related impact of different diagenetic fluids on the bulk-rock stable isotope signature, the identification of diagenetic end-members defined d 13 C and d 18 O threshold values that allowed the most reliable 'primary' bulk carbon isotope signatures to be extracted. Most importantly, this approach exemplifies how to place regional shallow-water stable isotope patterns with evidence for a complex multi-stage diagenetic history into a supraregional or even global context.

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Sequence Stratigraphy-Based Geological Modeling of Upper Thamama (Lower Cretaceous) Reservoirs of a Giant Abu Dhabi Oil Field, United Arab Emirates

Cited by 8 publications

References 2 publications

High-Resolution Sequence-Stratigraphic Correlation and Facies Characterization of Upper Thamama (Lower Cretaceous) Reservoir Units and Non-Reservoir Zones, Abu Dhabi, United Arab Emirates

High-Resolution Sequence-Stratigraphic Correlation and Facies Characterization of Upper Thamama (Lower Cretaceous) Reservoir Units and Non-Reservoir Zones, Abu Dhabi, United Arab Emirates

The influence of the provenance of arenite on its diagenesis in the Cameros Rift Basin (Spain)

Disentangling shallow‐water bulk carbonate carbon isotope archives with evidence for multi‐stage diagenesis: An in‐depth component‐specific petrographic and geochemical study from Oman (mid‐Cretaceous)

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