Literatura académica sobre el tema "Sedimentary infilling"
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Artículos de revistas sobre el tema "Sedimentary infilling":
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Menier, David, Bernadette Tessier, Jean-Noël Proust, Agnès Baltzer, Philippe Sorrel y Camille Traini. "The Holocene transgression as recorded by incised-valley infilling in a rocky coast context with low sediment supply (southern Brittany, western France)". Bulletin de la Société Géologique de France 181, n.º 2 (1 de marzo de 2010): 115–28. http://dx.doi.org/10.2113/gssgfbull.181.2.115.
Resumen
Abstract A combination of morphobathymetric studies, very high-resolution seismics, core sampling and radiocarbon age data is used to investigate the latest stage of the sedimentary infilling of incised valleys in southern Brittany, related to the Holocene transgression. Owing to the bedrock morphology of this highly irregular rocky coast, two main types of valleys are defined by topographic rocky highs parallel to the coastline: 1) wide and rather shallow incised valleys offshore from a topographic sill, 2) narrow and relatively deep valleys between the sill and the coast (ria-type valley). The sedimentary infilling in both types of valleys becomes highly differentiated as the transgression advances onto the coastal area. In the wide valley seaward of the topographic sill, the infilling consists mainly of offshore heterolithic facies while, in the ria-type valley, most of the infill is composed of brackish mudflat deposits and estuarine tidal muddy sands. As the transgression proceeds, the rocky highs are flooded and the whole area is finally covered by the offshore facies. Radiocarbon dating indicates that: 1) the marine ravinement surface is highly diachronous (a few thousand years cross-shore); 2) the top of the offshore facies, coarser and very shelly, represents an episode of condensed sedimentation from about 3000 to 4000 years ago, amalgamating the maximum flooding surface (MFS) and the highstand systems tract (HST). However, we observe a muddy drape, strongly bioturbated in places, in the most proximal areas, overlying the offshore facies. It is thought to represent the modern and most recent stage of sedimentary infilling. This mud cover is made of fine-grained sediments of fluvial and biological origin, and is interpreted as a prograding HST. It reflects an increased influx, partly due to human activities. Finally, the main features of incised valley sedimentary infilling in a rocky coast context with low sediment supply can be characterized by (i) the very strong control of bedrock morphology, (ii) the diachronous character of the transgression, (iii) the late position of the MFS, and (iv), the highly reduced volume of the HST.
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Farrand, William R. y Jill P. McMahon. "History of the sedimentary infilling of Yarimburgaz Cave, Turkey". Geoarchaeology 12, n.º 6 (septiembre de 1997): 537–65. http://dx.doi.org/10.1002/(sici)1520-6548(199709)12:6<537::aid-gea3>3.0.co;2-#.
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Freiman, S. I., A. M. Nikishin y E. I. Petrov. "Cenozoic clinoform complexes and geological history of the North-Chukchi basin (Chukchi sea, Arctic)". Moscow University Bulletin. Series 4. Geology, n.º 4 (28 de agosto de 2019): 11–19. http://dx.doi.org/10.33623/0579-9406-2019-4-11-19.
Resumen
New sesmostratigraphic model has been established for the sedimentary cover of the North-Chukchi basin. Based on the model interpretation of the main paleogeographic events within the territory was performed. We identify three stage in the post-rift sedimentary history of the North-Chukchi basin: Late Cretacerous to Paleocene stage when strong progradation of shelf sedimentary packages was occurred, Mid Eocene — Miocene, with gradual infilling of the basin from different sides and Late Miocene to Present stage with present shapes of the shelf and slow clinoform complex aggradation.
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Odonne, Francis, Daniel Beaufort, Romain Munck, Laure Bourrières y José Darrozes. "Smectite as a marker of telogenetic process along structural heterogeneities of sedimentary basin: case study of the Eocene submarine slide surfaces of the Ainsa Basin". Bulletin de la Société géologique de France 188, n.º 4 (2017): 22. http://dx.doi.org/10.1051/bsgf/2017186.
Resumen
Fluid circulation in sedimentary basins is responsible for the transformation and cementation of mineral grains during diagenesis. Concretions and pipe chimneys are obvious features resulting from such circulation but some transformations in the matrix of rocks, if less spectacular, may lead to pervasive transformations of the sediments. Inherited slide surfaces in the Eocene Ainsa Basin (Spanish Pyrenees) have been chosen to test this hypothesis. In the Sobrarbe delta, the steady mineralogy of marls indicates homogeneity of the sedimentary source. Enrichment of montmorillonite is only observed close to scar surfaces and in the infilling of the scars. Scanning electron microscope (SEM) observation reveals that smectites are formed by in situ replacement of detrital mafic minerals resulting by transformation of detrital minerals under the action of cold sedimentary fluids, lower than 75 °C. The indications of low temperature conditions and local fluid circulation both support a meteoric origin of the fluids postdating the burial history, probably during an exhumation of the basin associated with the tectonic uplift. The higher smectite contents in the infilling of scars and along the unconformities of slide surfaces reveals enhanced circulation of fluids in under-consolidated sediments and the effective fluid circulation pathways along inherited slide surfaces.
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Amoussou, Ernest, Henri S. Totin Vodounon, Expédit W. Vissin, Gil Mahé y Marc Lucien Oyédé. "Sedimentary evolution and ecosystem change in Ahémé lake, south-west Benin". Proceedings of the International Association of Hydrological Sciences 377 (16 de abril de 2018): 91–96. http://dx.doi.org/10.5194/piahs-377-91-2018.
Resumen
Abstract. Tropical moist ecosystems, such as Ahémé lake, south-west Benin, are increasingly marked by water degradation, linked with the activities of increasing riparian populations. The objective of this study is to analyze sedimentary dynamics and its influence on the changing ecosystem of Ahémé lake from 1961–2010. Data used to carry out the study are records of precipitation, flows, turbidity, suspended sediment, mineral elements and bathymetry. Grain size data from the sieving of sediment samples were used to interpret suspended solids distribution in the lake. Linear correlation coefficients were used to assess the degree of dependence between rainfall and runoff inputs to the lake. Lake depth measurements in some areas of the lake serve to determine the rate of infilling. The sorting index was used to highlight the distribution and origin of sediments in the lake. The results show a degradation of the lake Ahémé ecosystem characterized by infilling of its bed, a high correlation (r=0.90) between rainfall and runoff, seasonal change in physicochemical parameters (total suspended sediment decrease by −91 %) and decrease in fish production by 135.8 t yr−1. The highest mean suspended sediment concentrations in lake inputs occur during high water periods (123 mg L−1) compared to low water periods (11.2 mg L−1).
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Li, Yuan, Wenhui Huang, Bo Jiu, Qilong Sun y Qingsong Che. "Modes of Occurrence and Origin of Minerals in Permian Coals from the Huainan Coalfield, Anhui, China". Minerals 10, n.º 5 (29 de abril de 2020): 399. http://dx.doi.org/10.3390/min10050399.
Resumen
Minerals in coal provide useful information for not only paleo-environments of peat accumulation, but also for geological evolution during later diagenesis and/or epigenesis. This paper reports new data on coal quality and the mineralogical and geochemical compositions of 17 unaltered (by intrusion) coal samples collected from the Huainan coalfield, providing new insight into the origins and modes of occurrence of the minerals in coal and their geological evolution. The results showed that the studied coal samples were low rank bituminous coal, with low ash yield (11.92–38.31%, average 24.80%) and high volatile content (25.13–43.43%, average 37.29%). Minerals in the coal mainly included kaolinite and quartz; varying proportions of calcite, siderite, ankerite, and pyrite; and traces of chlorite, zircon, strontianite, apatite, and gorceixite. Typical modes of mineral occurrence could be used to determine the formation stage of minerals. The detrital mineral, occurring as sub-angular to rounded discrete fragments or thin layers intimately admixed with organic matter at particular horizons, was of terrigenous origin, deposited during peat accumulation. Cell infillings, as well as nodule siderites and polycrystalline aggregates of pyrite, precipitated during the syngenetic to early diagenetic stages. Cleat infillings, compressed cell infillings, and fracture infillings precipitated in the epigenetic stage. However, the stage of mineral formation of the pore infilling was difficult to determine. Combined with coal quality, mineralogy, and geochemical analysis, the sedimentary environment of Shanxi Formation was affected by seawater, and Fe-rich hydrothermal fluids filled into the No. 3 coal seam in the epigenetic stage. The sedimentary environment of the No. 8 coal seam had widespread reduction and acid conditions due to basin subsidence, and sulfate-rich hydrothermal fluids may have been formed during the peat deposition stage. In contrast, the peat accumulation environment of the Upper Shihezi Formation was oxidized with a low pH condition. Alkaline fluid then flowed into the No. 13-1 coal seam in the epigenetic stage.
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Beauchamp, Jacques, Alain Izart y Alain Piqué. "Les bassins d'avant-pays de la chaîne hercynienne au Carbonifère inférieur". Canadian Journal of Earth Sciences 28, n.º 12 (1 de diciembre de 1991): 2024–41. http://dx.doi.org/10.1139/e91-183.
Resumen
The evolution of marine sedimentary basins deformed by the Hercynian Orogeny was studied in Germany, France, Iberia, Northwest Africa, and North America in the Lower Carboniferous. These basins opened along strike–slip faults and were filled with turbidites and shelf deposits until the main compressive phase at the end of Visean and the Namurian. The infilling was interrupted with frequent volcanic episodes and gravity-induced movements. According to sedimentary vergence, these basins were set into two festoons on both sides of an elongated and emergent swell structured during the Devonian and corresponding to the internal zones of the orogen. These basins were filled during a general tectonic compression phase; they correspond to the foreland basins of the Hercynian belt.
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Cleveringa, P., T. Meijer, R. J. W. van Leeuwen, H. de Wolf, R. Pouwer, T. Lissenberg y A. W. Burger. "The Eemian stratotype locality at Amersfoort in the central Netherlands: a re-evaluation of old and new data". Netherlands Journal of Geosciences 79, n.º 2-3 (agosto de 2000): 197–216. http://dx.doi.org/10.1017/s0016774600023659.
Resumen
AbstractIn order to obtain a better understanding of the infilling of the Saalian glacial basins during the Eemian, particularly following the recent research in the Amsterdam Basin (Terminal borehole), it was necessary to re-investigate the type locality of the Eemian at Amersfoort. Both published and unpublished data from various biota (diatoms, foraminifers, molluscs, ostracods, pollen) provide new information on the changing sedimentary environments during the Eemian. Although the organic and clastic sediments of the infilling represent nearly all the pollen zones, the sedimentary sequence at Amersfoort is discontinuous: four breaks at least are recognised at the type locality.The successive sedimentary environments and the breaks in the record are linked with the transgression of the Eemian sea, the topographic position at the margin of an ice-pushed ridge, and the changes in hydrodynamic conditions. Local conditions, such as a sandy sea bed, shallow water and a reduced water exchange near the North Sea margin, influenced the salinity of the basin. Rib counts of Cerastoderma edule shells indicate a higher salinity at the end of the Taxus (E4b) and the beginning of the Carpinus (E5) zones than that present in the modern North Sea. Local conditions were responsible for the higher salinity following the climate optimum.During the Abies phase (the later part of regional pollen zone E5), the sea level had already fallen. The change from eu-trophic peat growth (with Alnus and Salix) to an oligotrophic Ericaceae/Sphagnum community at the end of the Eemian resulted from the change from a marine to a fresh-water environment, probably coherent with a deterioration of the climate.
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Barnett, P. J., J. P. Coakley, J. Terasmae y C. E. Winn. "Chronology and significance of a Holocene sedimentary profile from Clear Creek, Lake Erie shoreline, Ontario". Canadian Journal of Earth Sciences 22, n.º 8 (1 de agosto de 1985): 1133–38. http://dx.doi.org/10.1139/e85-115.
Resumen
An abandoned channel of Clear Creek, cut approximately 5 m below the present level of Lake Erie, was cored and the infilling sediments were examined. The postglacial history of this channel was reconstructed based on sedimentological, palynological, and chronological studies.The channel was cut initially some 15 m into Wentworth Till during the low-water Early Lake Erie stage. The infilling or aggradation of the channel began about 9500–9000 years BP, probably in response to rising water levels in the Lake Erie basin.This channel was cut off from the main channel shortly afterwards and an oxbow lake formed. By 7000 years BP, complete cutoff of the channel from the main stream system had occurred, allowing peat to accumulate. Eventually trees grew on this site, 4000 years BP.The diversion of glacial Lake Nipissing drainage into the Lake Erie basin may be reflected in the greater abundance of silt laminations in the peat of the upper part of the channel fill between 5975 ± 150 (BGS-899) and 3900 ± 100 (BGS-898) years BP.A rise in water level in the Lake Erie basin possibly over the Clear Creek site is recorded by the "drowning" of the forest shortly after 3900 ± 100 (BGS-898) years BP and the truncation of the Clear Creek site pollen diagram.
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Horvath, David G. y Jeffrey C. Andrews-Hanna. "The hydrology and climate of Mars during the sedimentary infilling of Gale crater". Earth and Planetary Science Letters 568 (agosto de 2021): 117032. http://dx.doi.org/10.1016/j.epsl.2021.117032.
Tesis sobre el tema "Sedimentary infilling":
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Oguadinma, Vivian Onyinyechukwu. "The submarine canyon heads of the Niger delta : structural controls, sedimentary infilling and Cenozoic evolution". Electronic Thesis or Diss., Université de Lille (2022-....), 2022. http://www.theses.fr/2022ULILR087.
Resumen
Les canyons sous-marins sont des corridors majeurs pour le transfert des sédiments des continents vers les bassins sous-marins profonds. Considérés comme des structures de transit scellées par des boues distales, les canyons ont peu fait l'objet de prospective en termes de géologie de réservoir. La source des sédiments, le moment des apports, les mécanismes de transport dans les canyons sous-marins diffèrent d'une marge à l'autre en fonction des contextes climatique et géodynamique, ce qui en fait un vaste champ d'étude. Ce travail présente les résultats d'une étude sismique 3D haute résolution d'un canyon du SE du delta du Niger, le canyon de Galabor. Le volume sismique étudié, calé au puits (gamma ray et calibration biostratigraphique), a été et exploré à travers (i) des coupes verticales réalisées le long et en travers des thalwegs du canyon et (ii) des cartes d'attributs sismique des horizons-clés. Après une revue bibliographique, deux articles soumis au BSGF sont présentés dans ce mémoire. Le premier article se concentre sur la géomorphologie sismique et les relations entre la déformation gravitaire (argilocinèse, failles de détachement) et la dynamique du canyon. Le confinement des écoulements turbiditiques dans des ensellements bordés par des reliefs diapiriques explique une grande partie du piégeage du sable dans le haut de pente. Les processus de chenal sont responsables du tri et de la concentration de sable dans des ceintures méandriformes qui débordent largement de l'incision initiale. Le deuxième article concerne la stratigraphie séquentielle. Deux séquences de dépôt de 100 000 ans sont identifiées, séparées par un horizon daté à 0,99 Ma. Dans chaque séquence, le sable n'est pas sourcé par une vallée incisée mais par l'érosion régressive sous-marine de deltas de bordure de plateforme. Le sable est en bypass dans le cortège de chute, dominé par des écoulements de débris boueux, et stocké dans le cortège de bas niveau. Le cortège transgressif, épais et formant une excellente couverture au-dessus du réservoir sableux, est dominé par une sédimentation fine hémipélagique et le cortège de haut niveau est absent. Des questions demeurent, comme celle du sourçage du sable et des transformations de l'écoulement entre les mécanismes gravitaires et tractifsSubmarine canyons are major corridors for transferring sediments from continents to deep submarine basins. Considered transit structures sealed by distal mud, canyons have little perspective in reservoir geology. The source of the sediments, the timing of inputs, and the transport mechanisms in submarine canyons differ from one margin to another depending on the climatic and geodynamic contexts, making it a vast field of study. This work presents the results of a high-resolution 3D seismic survey of a south-eastern submarine canyon in the Niger Delta, the Galabor Canyon. After a literature review, two articles submitted to BSGF are presented in this dissertation. The first article focuses on seismic geomorphology and the relationships between gravity deformation (shale ridges, detachment faults) and canyon dynamics. The seismic volume studied, wedged at the well (gamma ray and biostratigraphic calibration), was explored through (i) vertical sections along and across the thalwegs of the canyon and (ii) seismic attribute maps of key horizons. The confinement of turbiditic flows in intra slope basin bordered by shale ridges explains much of the trapping of sand at the upper slope. Channel processes are responsible for sorting and concentrating sand in meander belts that extend far beyond the initial incision. The second article concerns sequential stratigraphy. Two 100,000-year-old deposition sequences are identified, separated by a dated horizon of 0.99 Ma. In each sequence, the sand is not sourced by an incised valley but by the regressive submarine erosion of shelf-edge deltas. The sand is bypassed in the falling stage system tract, dominated by mass transport deposits, and preserved in the low stand system tract. The transgressive system tract, which is thick and forms an excellent seal above the sandy reservoir, is dominated by fine hemipelagic sedimentation and the high stand system tract is absent. Questions such as sediment source and flow transformations between gravity and tractive mechanisms remain unanswered
Capítulos de libros sobre el tema "Sedimentary infilling":
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Kullberg, José Carlos, Rogério Bordalo da Rocha, António Ferreira Soares, Luís Vitor Duarte y Júlio Fonseca Marques. "Palaeogeographical Evolution of the Lusitanian Basin (Portugal) During the Jurassic. Part II: The Slow-to-Fast Transformations of Sedimentary Infilling". En Springer Geology, 673–79. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-04364-7_128.
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Critelli, Salvatore y Sara Criniti. "Sandstone Petrology and Provenance in Fold Thrust Belt and Foreland Basin System". En Sedimentary Petrology - Implications in Petroleum Industry [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.96985.
Resumen
The sandstone composition of foreland basin has a wide range of provenance signatures, reflecting the interplay between flexed underplate region and abrupt growth of the accreted upper plate region. The combination of contrasting detrital signatures reflects these dual plate interactions; indeed, several cases figure out that the earliest history of older foreland basin infilling is marked by quartz-rich sandstones, with cratonal or continental-block provenance of the flexed underplate flanks. As upper plate margin grows over the underplate, the nascent fold-and-thrust belt starts to be the main producer of grain particles, reflecting the space/time dependent progressive unroofing of the subjacent orogenic source terranes. The latter geodynamic processes are mainly reflected in the nature of sandstone compositions that become more lithic fragment-rich and feldspar-rich as the fold-thrust belt involves the progressive deepest portions of upper plate crustal terranes. In this context sandstone signatures reflect quartzolithic to quartzofeldspathic compositions.
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Koster, Eduard. "River Environments, Climate Change, and Human Impact". En The Physical Geography of Western Europe. Oxford University Press, 2005. http://dx.doi.org/10.1093/oso/9780199277759.003.0015.
Resumen
In this chapter a short overview of the evolution, geomorphological expression, sedimentary records, and discharge and sediment regimes of the major rivers in western Europe is presented. The rivers Elbe, Weser, Rhine, Meuse, Scheldt, Seine, Loire, Garonne, Rhône, and Danube will be separately reviewed but not necessarily in this order and not with equal attention. Emphasis is placed on the Quaternary record and most issues are exemplified by a discussion on phenomena and processes in the Rhine–Meuse delta. As almost all these rivers are strongly influenced by man’s activities, attention is also focused on river management practices, both in a historic context and at present. Finally, modern concepts and plans concerning river conservation and rehabilitation are briefly examined. The foundations of the modern drainage system in north-western Europe were laid in the Miocene when earth movements associated with Alpine orogenesis and the opening of the North Atlantic were at their height (Gibbard 1988). During the Late Tertiary–Early Quaternary the North Sea basin was dominated by an extensive fluvial system that drained the Fennoscandian and Baltic shield through the present Baltic Sea (Overeem et al. 2001; Fig. 6.2). The dimensions of this (former) drainage system were enormous; through empirical relationships based on recent fluvio-deltaic systems the drainage area is estimated to have been in the order of 1.1 × 106 km2. Cenozoic marine and fluvial sediments reach a thickness of more than 3,500 m in the North Sea basin. Quaternary sediments with a thickness of over 1,000 m imply a tenfold increase in sedimentation during this period in comparison to the Tertiary infilling. The fluvial system of Miocene to Middle Pleistocene age has been referred to as the Baltic River system (Bijlsma 1981). It is also designated as the Eridanos delta system by Overeem et al. (2001) named after the legendary Eridanos river in northern Europe mentioned in Greek records (7th century BC). In a seismo-stratigraphic study Overeem et al. (2001) have documented the large-scale basin-fill architecture in terms of external forcing by tectonics, sea-level variations, and climate. The development of this drainage system is attributed to the simultaneous Neogene uplift of the Fennoscandian Shield and the accelerated subsidence of the North Sea basin.
Actas de conferencias sobre el tema "Sedimentary infilling":
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Miguel, G. San, N. Vilasi-Marmier, M. Bez, S. Veillard, N. Buratti, M. Rousseau, A. Ahmed, M. Stankoff y J. L. Rubino. "Stratigraphic Forward Modelling in Albert Lake as a Tool for an Integrated Understanding of Basin Sedimentary Infilling". En Fifth EAGE Eastern Africa Petroleum Geoscience Forum. European Association of Geoscientists & Engineers, 2021. http://dx.doi.org/10.3997/2214-4609.2021605016.
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O'Connor, Meg C., Samuel J. Bentley, Kehui Xu, Jeff Obelcz, Chunyan Li y Mike Miner. "SEDIMENT INFILLING OF LOUISIANA CONTINENTAL-SHELF DREDGE PITS: A RECORD OF SEDIMENTARY PROCESSES IN THE NORTHERN GULF OF MEXICO". En 50th Annual GSA South-Central Section Meeting. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016sc-273300.
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Hasnan, Zurriya Hayati, Amir Ayub, Mohammad Hishamuddin Ismail, Mariah Harris, Soon Mun Chin, Syarifah Nur Syed Khastudin, Nur Yusra Mansor, Tengku Mohd Tengku Hassan, Noor Farahida Ahmad Sharif y Xavier Legrand. "The Black Sea, the Latest New Exploration Frontiers in Europe: Preliminary Results of an Escape Tectonics". En International Petroleum Technology Conference. IPTC, 2021. http://dx.doi.org/10.2523/iptc-21156-ms.
Resumen
Abstract OBJECTIVE / SCOPE The Black Sea is a Mesozoic-Cenozoic closed sea system representing one of the last few exploration frontiers in the vicinity of the European market. The overall prospectivity of the basin and associated regional prospective trends have been delineated using the integrated Play-Based Exploration approach. The tectonic evolution, basin formation, sedimentary infilling history, petroleum systems, and sedimentary plays have been investigated to search for new hydrocarbon potential in the basin. METHODS, PROCEDURES, PROCESS The seismic interpretation and mapping were based on 26 sparse 2D seismic lines (ION SPAN), which were acquired and processed in 2011-2012 by ION GTX. The multi-client data from offshore Russia, Crimea, and Ukraine were excluded due to geopolitical sanction. The seismic interpretation which was completed in the depth domain (PSDM depth) was calibrated using three Deep Sea Drilling Project (DSDP) wells namely Sites 379, 380, and 381 (Fig. 1) which penetrated only the shallower section namely the Top Miocene and Top Pliocene. However, the seismic markers where lacking well penetration were primarily interpreted based on seismic stratigraphy. Interpretation of the acoustic basement as well as crustal types were supplemented with gravity and magnetic data from Getech Globe’s database. Three key seismic lines (Fig. 1) were then selected to illustrate the overall basin geomorphology, structural evolution, and to subsequently identify play potential within the basins. The structural analysis was integrated with the seismic sequence stratigraphic analysis to understand the sedimentation history, depositional trends, kinematic evolution, and tectonic history.
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Xiao, Dengyi, Mingsheng Lv, Guangcheng Hu, Wenyuan Tian, Li Wang, Ren Ma, Wenhao Zhao, Maryam Al Shehhi y Ashis Shashanka. "Characteristic of Tuwayil Formation and New Insight into its Contribution in Middle Cretaceous Petroleum System, Western UAE". En Abu Dhabi International Petroleum Exhibition & Conference. SPE, 2021. http://dx.doi.org/10.2118/207521-ms.
Resumen
Abstract In Western UAE, the Middle Cretaceous petroleum system is composed of Shilaif source, Mishrif/Tuwayil reservoir and Tuwayil/Ruwaydha seal. Oil is discovered in Tuwayil sandstone in DH and NN fields. Well correlation of Tuwayil siliciclastic interval shows high heterogeneity and rapid lithology varies. Currently, a few general studies about Tuwayil sandstone was published. However, detailed sedimentary facies, reservoir characteristics and accumulation mechanism about Tuwayil are ambiguous. Limitation on these aspects prohibits enlarging exploration activity of Tuwayil and makes barriers to deepen understanding of the whole K2 PS. To enhance understanding on Tuwayil formation, well data in DH, NN fields and adjacent area was integrated. Dedicated single well analysis, well correlation and petrophysics study were carried out. Cores were observed and laboratory outcomes including TS, SEM, RCA, MICP, XRD were adopted into this study. Furthermore, we have also utilized 2D&3D seismic to illustrate the spatial distribution of Tuwayil siliciclastic setting and interior sediment pattern. Basically, the Tuwayil sand-shale interval represents the infilling of Mishrif/Shilaif intrashelf basin and mainly deposits in the tidal flat-delta facies. The epi-continental clast is sourced from the Arabian shield and transferred from west to east. In Western UAE, the Tuwayil depocenter located in DH field, where 4-5 sand layers deposit with net pay of 30-40ft. In NN field, only one sand layer develops with net pay about 4-6ft. Through deposition cycles identification and seismic reflection observation, two sand groups could be recognized in this interval. The lower group is constrained in the depocenter and influenced by the paleo-geomorphology background. The upper group overpassed the former set and pinched out around north of NN. The Mishrif/Shilaif slope area is another potential belt to enlarge Tuwayil discovery, where stratigraphic onlap could be observed and it probably represents the sand pinch-out in lower sand group. For the K2 PS, previous study believed the shale between Tuwayil sand and Mishrif separate these two reservoirs and works as cap rock for Mishrif grainstone. This study suggests that this shale is too thin and not continuous enough to hold the hydrocarbon in Mishrif. On that note, Tuwayil sand and Mishrif belong to the same petroleum system in NN and may have the same OWC. In the NN field, it is quite crucial to consider the extension of Tuwayil sand during evaluating the stratigraphic prospect of Mishrif because the hydrocarbon is mostly likely charged Tuwayil sand first and then gets into underlain Mishrif. This study provides updates and understandings on sedimentary facies, depositional pattern, hydrocarbon accumulation mechanism, reservoir extension and potential identification of Tuwayil formation, which has inspiring implications for the whole K2 PS and could also de-risk the further exploration activity in Western UAE.