Sequence stratigraphic analysis and depositional evolution of the Upper Cretaceous deposits in Ras Budran oil field, Gulf of Suez, Egypt

Elhossainy, Mohamed M.; Salman, Abdelhamid M.; Sarhan, Mohammad Abdelfattah; Al‐Areeq, Nabil M.; Alrefaee, Hamed A.

doi:10.1007/s12517-021-07470-z

Cited by 16 publications

(4 citation statements)

References 12 publications

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“…Towards the end of the Cenomanian, regional uplift caused significant subaerial exposure and erosion in the upper part of this limestone unit (in most parts of the Zagros) [50]. However, because of the deeper settings in the Lurestan Zone, deposition continued without significant unconformities [51] (Figures 2 and 3). In the central Lurestan Zone, deeper marine conditions led to the deposition of shale and argillaceous limestone of the Surgah Formation [52].…”

Section: Lurestan Zonementioning

confidence: 98%

Evidence for Isolated Platform Development in the Cenomanian on the Passive Margin of Neotethys, Southwest Iran

2023

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In the Cenomanian, the southern passive margin of the Neotethys Ocean was dominated by a giant carbonate factory. This succession is known as Sarvak Formation, a significant reservoir in Iran. This study focuses on a detailed analysis of facies variations and paleoenvironmental reconstruction, including the interpretation of the platform types, during this time interval. Based on field observations and petrographical studies, 12 facies have been recognized and ascribed to six facies belts on a carbonate ramp. Sub-environments include the outer ramp and basin (distal open marine), talus and channel (mid-ramp) and lagoon and shoal (inner-ramp). The frequency of the facies and isochore maps indicate the paleoenvironmental conditions and their spatial variations in the study area. Based on all data and analyses, the suggested conceptual model for the Sarvak Formation in the Lurestan Zone is an isolated platform surrounded by two ramps. The upwind and downwind parts of these ramps were located in the central and northern sub-zones of the Lurestan Zone. This model can be used as a template for isolated platforms worldwide.

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Section: Lurestan Zonementioning

confidence: 98%

Evidence for Isolated Platform Development in the Cenomanian on the Passive Margin of Neotethys, Southwest Iran

2023

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“…The sequence stratigraphy study of the volcanic rock-evaporite-clastic rock symbiotic system is more complicated mainly because the particularity of sedimentation principle and the diversity of the superposition relationship affect the definition of the sequence boundary [14,15]. In the continuous sedimentary strata, the conversion surface of the progradation-degradation stacking mode of the parasequence set in the vertical direction and its corresponding sedimentary discontinuity surface in the paleo uplift edge area in the horizontal direction are some of the main bases for the identification of the sequence interface [16][17][18]. In this paper, the fourth member of the Shahejie Formation in the south of the Laizhou Bay Sag was taken as the study object considering the theoretical guidance of the sequence stratigraphy, structural geology, classical sedimentology, and seismic sedimentology; the structural evolution law and sedimentary strata development characteristics in the study area; and the core, drilling, logging, and seismic data, according to the different lithology of sediments in different areas as the principle of dividing the study area.…”

Section: Introductionmentioning

confidence: 99%

Sequence Stratigraphic Analysis of the Volcanic Rock–Evaporite–Clastic Rock Symbiotic Zone in the Fourth Member of the Shahejie Formation in the South of Laizhou Bay

Zhao,

Wang,

Zhang

2024

Applied Sciences

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Laizhou Bay Sag is a typical continental rift lake basin, which is affected by strike–slip activity, salt rock activity, volcanic activity, and paleoclimate change in the Tanlu fault zone, where three major lithologies—volcanic rock, clastic rock, and evaporite—mainly develop. In order to determine the sequence correspondence between the different lithologies in the study area based on drilling, logging data, and seismic data, it is determined that the fourth member of the Shahejie Formation in the southern Laizhou Bay mainly develops three types of sequences: clastic rock type sequences, salt lake type sequences, and volcanic rock/clastic rock type sequences. Two second-order sequence boundaries (SBs3L, SBs4L) and one third-order sequence boundary (SBs4U) were identified, and the principle of three divisions of system tracts (LST, TST, HST) and sedimentary processes in different types of sequences were determined by analyzing the stacking patterns of different sequences. Compared with the previous research results, this study provides a more detailed analysis of the sequence boundary definition of different blocks and different lithologic strata, and it improves the previous general sequence stratigraphic division method. Based on the study of distinct types of sequences, a unified stratigraphic framework is established in the whole zone, and the stratum thickness distribution of the fourth member of Shahejie Formation is smaller in the southwest and larger in the northeast. The study area is generally filled with pyroclastic rocks–evaporite–clastic rocks, changing from fan delta–saline lake filling to braided river delta–freshwater lake–fan delta filling from bottom to top. A sequence stratigraphic model for the comparison of steep slope–gentle slope differences is established to provide guidance for future oil and gas field exploration and development.

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“…These units from younger to older are 1) post-rift sequence which ranged in age from post-Miocene to Holocene sediments 2) syn-rift sequence that ranged from Oligocene to late Miocene age 3) pre-rift sequence involves whole interval of pre-Miocene sediments. These three mega sequences are widely variable in depositional environment, lithology, thickness and hydrocarbon potentiality (Plaziat et al, 1998;Alsharhan, 2003;Elhossainy, 2021). The Gulf of Suez basin produces from Precambrian Basement to post-Miocene reservoirs which contain about 60 oil elds with primary reserves varied from 1.350 million barrels to one million barrels (Alsharhan and Salah, 1997).…”

Section: Introductionmentioning

confidence: 99%

Sedimentary microfacies and reservoir quality of the Nubian sandstone Formation, southern Gulf of Suez province, Egypt

Aziz

2023

Preprint

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The present work considered a combination study between analysis of core petrophysics and sedimentary microfacies to estimate the reservoir quality of the studied Nubian sandstone reservoir in Saqqara oil field. The SEM observation of the studied Nubian reservoir displays quartz, feldspars and detrital clays are the dominant framework grains. Patchy dolomite, pyrite, kaolinite and illite are the common authigenic components. Euhedral syntaxial quartz overgrowths are relatively less common. Generally, all the samples are well cemented with relatively close grain packing and poorly developed primarly intergranular porosity. Most of the samples are fine grained and moderately to well sorted. Point counted porosity ranged from nil to 34%. The studied reservoir sequence could be sub divided into two reservoir rock types (RRTs). RRT1 is the best rock type forming the most upper parts of the Nubian Formation which composed from well sorted, fine grained, moderately cemented sandstone with minor primary intergranular porosity, minor dispersed pore filling detrital clay matrix, minor poorly crystallized illite and highly fractured framework feldspar grains. Whereas the RRT2 composed from moderately sorted, fine grained, well cemented with rare primary intergranular porosity, common dispersed pore filling detrital clay matrix and kaolinite plates, well crystallized hairy-like illites locally replace clay matrix. The petrophysical properties of the Nubian sandstone are more affected by significant quantities of Kaolinite and locally patchy siderite that are the main factors in reducing point counted porosity. RRT1 represent the best reservoir quality which has fair to excellent horizontal permeability (1.9–2719 md), poor to good porosity (7.3–19%), tight to good reservoir quality index RQI (0.69–1.98 µm), tight to very good flow zone indicator FZI (3.21–10.52 µm). Whereas the RRT2 is the tightest reservoir rock type, it is composed of quartzwackes microfacies and has fair to good porosity (1.7–16.6%), tight to very good horizontal permeability (0.01–560 md), tight to good RQI and FZI values (0.02–0.86 µm and 0.66–6.07 µm, respectively.

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Sequence stratigraphic analysis and depositional evolution of the Upper Cretaceous deposits in Ras Budran oil field, Gulf of Suez, Egypt

Cited by 16 publications

References 12 publications

Evidence for Isolated Platform Development in the Cenomanian on the Passive Margin of Neotethys, Southwest Iran

Evidence for Isolated Platform Development in the Cenomanian on the Passive Margin of Neotethys, Southwest Iran

Sequence Stratigraphic Analysis of the Volcanic Rock–Evaporite–Clastic Rock Symbiotic Zone in the Fourth Member of the Shahejie Formation in the South of Laizhou Bay

Sedimentary microfacies and reservoir quality of the Nubian sandstone Formation, southern Gulf of Suez province, Egypt

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