Littérature scientifique sur le sujet « Quantitative provenance analysis »
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Articles de revues sur le sujet "Quantitative provenance analysis"
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Weltje, Gert Jan, et Hilmar von Eynatten. « Quantitative provenance analysis of sediments : review and outlook ». Sedimentary Geology 171, no 1-4 (octobre 2004) : 1–11. http://dx.doi.org/10.1016/j.sedgeo.2004.05.007.
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Kinyua, A. M., T. Plummer, N. Shimizu, W. Melson et R. Potts. « Provenance of Kanjera Fossils by X-Ray Fluorescence and Ion Microprobe Analyses ». Advances in X-ray Analysis 35, B (1991) : 1165–73. http://dx.doi.org/10.1154/s0376030800013458.
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AbstractXRF and Ion mfcroprobe analyses of fossils of known and uncertain provenance from the Lower-Middle Pleistocene locality of Kanjera. Kenya, are reported. The goal of this study was to develop a nondestructive technique of provenancixig fossils, which could be applied to the Kanjera sample. The fossils of known provenance were collected in the excavations of the 1987 Smithsonian Expedition. Three fossils of uncertain provenance, two specimens of Theropithecus oswaldi and a hominid fossil, were analyzed as test cases.Both qualitative and quantitative XRF analyses of Kanjera fossils were carried out. In the qualitative analysis, the elemental peak areas from each fossil's XRF spectrum were calculated and normalized to the peak area of the incoherently scattered radiation. Results of the analysis showed that fossils from the Lower-Middle Pleistocene Kanjera Beds, for the most part, had higher levels of yttrium (Y) and zirconium (Zr) than those of the younger Apoko (Ap) Bed. black cotton soil (BCS) and modem bones (MD). The relative concentrations of uranium (U) v strontium (Sri and thorium (Th) were diagnostic of the Kanjera Bed of origin. These findings were confirmed by quantitative XRF and ion microprobe analyses of a subsample of Kanjera fossils. The T. oswaldi and hominid fossils had trace element concentrations suggestive of K2 and BCS provenances, respectively. These findings provide a framework for the qualitative XRF provenancing of other surface collected fossils from the locality.
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Muhammad Javed, Asif, Dorairaj Deivaseeno et Wickneswari Ratnam. « Characterization of natural provenances of Acacia mangium Willd. and Acacia auriculiformis A. Cunn. ex Benth. in Malaysia based on phenotypic traits ». Journal of Forest Science 63, No. 12 (12 décembre 2017) : 562–76. http://dx.doi.org/10.17221/82/2016-jfs.
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Acacia mangium Willdenow and Acacia auriculiformis A. Cunningham ex Bentham and their hybrid have become important planting species in Malaysia. Due to their high demand and consumption, development of high quality planting materials is desired. Conventional breeding of Acacia Miller is slow but the utilization of marker-assisted selection breeding can expedite the breeding process. Markers associated with quantitative trait loci (QTLs) required pedigreed populations whereas association mapping can be used directly on diverse germplasm. This study was conducted to screen provenances of A. mangium and A. auriculiformis of different geographical origins for their performance under the Malaysian environment. A. mangium exhibited superior traits compared to A. auriculiformis. More trait variation was observed within and between provenances of A. auriculiformis. Provenances from Queensland (QLD) were superior to those from Papua New Guinea (PNG) and Northern Territory. The best performing provenance with all three superior traits was from Claude River QTL of A. mangium and the worst was Bensbach Western Province, PNG belonging to A. auriculiformis. For individual traits like DBH, Morehead, PNG was superior. For plant height, Morehead, PNG was the superior provenance for A. mangium and Morehead River, QLD was from A. auriculiformis. For stem straightness the A. auriculiformis provenance Jardines Garden, QTL was superior to West of Morehead (PNG) for A. mangium. Multivariate analysis grouped provenances together based on similar traits and genetic similarity. These provenances can be used for seed families which can be treated as a homogeneous population for association mapping or for the development of segregating hybrid populations for Acacia breeding. For the purpose of utilization, provenances of A. mangium can be used for sawn timber. For fuelwood and charcoal industries, A. auriculiformis provenances should be preferred by selecting multi-stemmed trees. The most variable provenances with superior phenotypic traits can be integrated with the genotypic data e.g. single nucleotide polymorphism markers for association mapping to identify quantitative trait loci for marker-assisted breeding.
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VERHAEGEN, J., G. J. WELTJE et D. MUNSTERMAN. « Workflow for analysis of compositional data in sedimentary petrology : provenance changes in sedimentary basins from spatio-temporal variation in heavy-mineral assemblages ». Geological Magazine 156, no 07 (22 août 2018) : 1111–30. http://dx.doi.org/10.1017/s0016756818000584.
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AbstractThe field of provenance analysis has seen a revival in the last decade as quantitative data-acquisition techniques continue to develop. In the 20th century, many heavy-mineral data were collected. These data were mostly used as qualitative indications for stratigraphy and provenance, and not incorporated in a quantitative provenance methodology. Even today, such data are mostly only used in classic data tables or cumulative heavy-mineral plots as a qualitative indication of variation. The main obstacle to rigorous statistical analysis is the compositional nature of these data which makes them unfit for standard multivariate statistics. To gain more information from legacy data, a straightforward workflow for quantitative analysis of compositional datasets is provided. First (1) a centred log-ratio transformation of the data is carried out to fix the constant-sum constraint and non-negativity of the compositional data. Next, (2) cluster analysis is followed by (3) principal component analysis and (4) bivariate log-ratio plots. Several (5) proxies for the effects of sorting and weathering are included to check the provenance significance of observed variations and finally a (6) spatial interpolation of a provenance proxy extracted from the dataset can be carried out. To test this methodology, available heavy-mineral data from the southern edge of the Miocene North Sea Basin are analysed. The results are compared with available information from literature and are used to gain improved insight into Miocene sediment input variations in the study area.
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Zachariáš, Jiří, Aneta Kuchařová et Marek Kotrlý. « Provenance Analysis of Marbles by Combination of Cathodoluminescence Spectroscopy and Electron Microprobe Analyses—Methodological Comments ». Minerals 13, no 2 (9 février 2023) : 244. http://dx.doi.org/10.3390/min13020244.
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Various marbles from historic quarries of the Czech Republic were examined by means of cathodoluminescence (CL) spectroscopy (quantitative data) to determine the possible inclusion of the method in marble provenance studies. The methodology used was based on a combination of electron microprobe analysis (Ca, Mg, Fe and Mn composition) and CL spectroscopy (intensity) of calcite and dolomite grains of the marbles studied. Several statistical techniques were applied to the CL-spectra to find the most effective way of characterization of the CL-spectra for provenance discrimination. The combination of Mg-admixture of calcite and position of the maximum (i.e., centre) of a single Gaussian curve was revealed to be the most discriminative dependence of the marbles studied.
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Fu, Xiuli, Qi’an Meng, Yue Bai, Yangxin Su, Mingyu Jin, Zhengwang Huo, Hongxia Li et al. « Quantitative analysis of paleoenvironment of Qingshankou Formation in northern Songliao Basin, Northeastern China ». Interpretation 10, no 3 (6 juin 2022) : SD75—SD87. http://dx.doi.org/10.1190/int-2021-0153.1.
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The Qingshankou Formation in the Songliao Basin of northeastern China is an important layer for unconventional oil exploration. To solve the problem of the main controlling factors of shale oil enrichment, to quantitatively analyze the paleosalinity, paleoclimate, paleoredox environment, provenance, and lake productivity, and to clarify the relationship between sedimentary environment and total organic carbon, we have analyzed quantitative reconstruction of the sedimentary environment by using comprehensive analysis of multiple indicators with major and trace elements, fossils, and biomarkers. The results are as follows: the paleosalinity index w(Sr)/ w(Ba) ratio is 0.4–4, the w(B)/ w(Ga) value is 0.7–8.5, and the w(Pr)/ w(Ph) value is 0.8–2.8, which mainly stand for fresh brackish to saline water. The paleoclimate CIW′ (Chemical index of weathering, CIW = [A12O3/(AI203 + CaO+Na20)] × 100 [molecular proportions]) value is 90–100, indicating a warm and humid climate. The redox index w(V)/ w((V + Ni)) value is 0.54–0.89, which mainly belongs to the dysoxic environment. The provenance input of terrigenous debris index w(Ti)/ w(Al) value is 0.026–0.034, mainly standing for low terrigenous debris input. The production index CAL (enrichment degree of Cu) value is 1–3, belonging to high production. We conclude that the humid climate, the fresh brackish to saline and dysoxic water, and the high lake production provide favorable geologic conditions for biological reproduction and then provide a foundation for the formation, enrichment, and preservation of organic matter. The quantitative reconstruction of the paleoenvironment of the Qingshankou Formation has theoretical significance for Gulong shale oil exploration and development.
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Nguyen, Hiep Huu, Sang Nhu Pham, Hung The Khuong, Din Bui Dao, Bac Hoang Bui et Huy Quoc Chu. « A review of sediment provenance methods applied to the fluvial sediments in the East Sea based on clay mineralogy and Sr-Nd isotope ». Journal of Mining and Earth Sciences 63, no 4 (31 août 2022) : 45–60. http://dx.doi.org/10.46326/jmes.2022.63(4).05.
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Studying sediment provenance in the marine environment particularly plays an important role in interpretation of paleoclimate, lithology of the source regions as well as tectonism controlling weathering, erosion, transportation, and deposition processes (source-to-sink analysis). However, defining sediment sources and controlling elements require quantitative data and micro-analysis as they are influenced significantly by many factors such as lithology, tectonics, and climate condition in the source regions as well as sea-level changes, oceanic circulation, and their differential setting in the sea. A number of methods are employed to elucidate sediment provenance, but not all of them are useful in the East Sea. In this study, clay mineralogy and Sr-Nd isotope of sediment cores and surrounding river sediments in this region from previous studies are reused to evaluate their effectiveness in determining sediment provenance. In comparison between sediment cores and river sediments indicates that clay mineral assemblages and Sr-Nd isotopic composition of river sediments frequently contain feature information of the source regions that are preserved in marine sediments well, implying they contain valuable information of sediment provenance. Thus, these methods have been widely utilized to identify sediment provenance in the East Sea. This study displays that sediment provenance methods based on clay mineralogy and Sr-Nd isotope are effective tools in elucidating sediment provenance in the East Sea.
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Raymond, Carolyn A., J. F. G. Tibbits et M. Henson. « Genetic Variation Amongst and Within the Native Provenances of Pinus radiata D. Don in South-eastern Australia. 3. Molecular and Quantitative Structure ». Silvae Genetica 59, no 1-6 (1 décembre 2010) : 289–98. http://dx.doi.org/10.1515/sg-2010-0041.
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AbstractPatterns of differentiation between populations within a species can be examined using both molecular and quantitative data, with observed differences indicative of adaptation to local conditions. Pinus radiata D. Don (radiata pine) is a species of commercial importance in many countries but also listed as conservation dependent in its native range on the Californian coast and two off shore islands. This paper presents a comparative analysis of existing molecular data with new quantitative data from a large provenance/progeny trial in southeastern Australia. Microsatellite data was reanalysed using a Bayesian model to test whether the a priori assumption of five natural occurrences was valid. With the validity of the geographic structure confirmed, two further approaches were used to examine genetic structure 1. a comparative study of Fstand Qstestimates to investigate the role of drift and selection in shaping the differentiation between the populations for breeding traits and 2. population clustering based on both quantitative and molecular data. Results strongly support the hypothesis that the island provenances of Pinus radiata are distinctly different to the mainland provenances. The molecular evidence also indicates the island provenances are different to each other. However, these differences were not apparent for the quantitative traits related to tree growth and form. The two island populations were however, strongly differentiated from each other for wood density and acoustic velocity. The patterns of phenotypic differentiation of the island provenances for these wood traits are both consistent with, and greater than, that observed for the molecular data, providing some evidence for directional selection on these traits. This study provides a background for the interpretation of molecular studies aimed at detecting molecular signatures of selection and associating genetic variation within genes with these traits.
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Vicenzi, Edward, Meredith Sharps et Thomas Lam. « Quantitative Analysis of Obsidian and Determination of Source Provenance Using an Analytical Dual Beam SEM ». Microscopy and Microanalysis 27, S1 (30 juillet 2021) : 2560–63. http://dx.doi.org/10.1017/s1431927621009107.
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Caracciolo, L., S. Andò, P. Vermeesch, E. Garzanti, R. McCabe, M. Barbarano, C. Paleari, M. Rittner et T. Pearce. « A multidisciplinary approach for the quantitative provenance analysis of siltstone : Mesozoic Mandawa Basin, southeastern Tanzania ». Geological Society, London, Special Publications 484, no 1 (27 février 2019) : 275–93. http://dx.doi.org/10.1144/sp484-2018-136.
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AbstractThis paper shows how heavy minerals and single-grain varietal studies can be conducted on silt (representing c. 50% of world's sediments) sediments to obtain quantitative data as efficiently as for sand-sized sediments. The analytical workflows include heavy mineral separation using a wide grain-size window (15–355 μ) analysed through integrated optical analysis, Raman spectroscopy, QEMSCAN microscopy and U–Pb dating of detrital zircon. Upper Jurassic–Cretaceous silt-sized sediments from the Mandawa Basin of central-southern Tanzania have been selected for the scope of this research. Raman-aided heavy mineral analysis reveals garnet and apatite to be the most common minerals together with durable zircon, tourmaline and subordinate rutile. Accessory but diagnostic phases are titanite, staurolite, epidote and monazite. Etch pits on garnet and cockscomb features on staurolite document the significant effect of diagenesis on the pristine heavy mineral assemblage. Multivariate statistical analysis highlights a close association among durable minerals (zircon, tourmaline and rutile, ZTR) while garnet and apatite plot alone reflecting independence between the three groups of variables with garnet increasing in Jurassic samples. Raman data for garnet end-member analysis document different associations between Jurassic (richer in A, Bi and Bii types) and Cretaceous (dominant A, Ci and Cii types) samples. U–Pb dating of detrital zircon and their statistical integration with the above-mentioned datasets provide further insights into changes in provenance and/or drainage systems. Metamorphic rocks of the early and late Pan-African orogeny terranes of the Mozambique Belt and those of the Irumide Belt acted as main source of sediment during the Jurassic. Cretaceous sediments record a broadening of the drainage system reaching as far as the Usagran–Ubendian Belt and the Tanzanian Archean Craton.
Thèses sur le sujet "Quantitative provenance analysis"
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RESENTINI, ALBERTO. « Quantitative provenance analysis of modern sands : bulk petrography, heavy minerals apatite fission tracks ». Doctoral thesis, Università degli Studi di Milano-Bicocca, 2011. http://hdl.handle.net/10281/19000.
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Sediment petrography and heavy mineral analysis represent two key techniques to decipher the pieces of information stored in the sedimentary record, shedding light on source rocks compositon, weathering conditions and paleodrainages. Traditionally, even though orogenic detritus has always received large attention, orogenic provenance has been recognized as “composite”, thus preventing clear classification. Notwithstanding the composite nature of collision orogens, the detrital fingerprints of neometamorphic axial
belts, largely experiencing strong exhumation and erosion, can be regarded as the diagnostic signature of orogenic detritus. We thus decided to focus our attention on the analysis of modern river sands from the Alpine belt, getting full quantitative information both on bulk compositions and heavy mineral assemblages.
Within the Austroalpine Cretaceous and Penninic Eocene axial belts of the Alps, we ideally distinguish three structural levels, each characterized by diagnostic detrital fingerprints.
The shallow level chiefly consists of offscraped remnant-ocean turbidites and
unmetamorphosed continental-margin sediments, and mostly produces lithic to
quartzolithic sedimentaclastic sands yielding very-poor heavy-mineral suites including ultrastable minerals. The intermediate level includes low-grade metasediments and
polymetamorphic basements, and sheds quartzolithic to feldspatholithoquartzose
metamorphiclastic sands yielding moderately-rich epidote-amphibole suites with chloritoid or garnet. The deep level contains eclogitic remnants of continent-ocean transitions, and
supplies feldspatholithoquartzose/feldspathoquartzose high-rank metamorphiclastic to
lithic ultramaficlastic sands yielding rich to extremely-rich suites dominated by garnet,
hornblende, or epidote depending on protoliths (continental vs. oceanic) and
pressure/temperature paths during exhumation. Although widely overprinted under
greenschist-facies or amphibolite-facies conditions, occurrence of ultradense eclogite in source areas is readily revealed by the Heavy Mineral Concentration (HMC) index, which mirrors the average density of source rocks in the absence of hydraulic-sorting effects.
Rather than the pressure peak reached at depth, the Metamorphic Index (MI) and
Hornblende Colour Index (HCI) reflect peak temperatures reached at later stages, when
subduction is throttled by arrival of thicker continental crust and geothermal gradients increase, as documented in detritus derived from the Tauern window and Lepontine dome.
Experience gained from modern sediments, and appropriate statistical techniques provides fundamental help to decrypt the information stored in the sedimentary record, and thus to identify and reconstruct subduction events of the past.
Besides the fundamental contribution that modern sediment analysis can bring in
understanding ancient sandstone successions, it can also give insights on short-term
erosion distribution over wide areas and readily detect potential area of focused erosion.
We tested a new quantitative approach based on the integration of compositional data
and detrital apatite fission-tracks in two valleys of the western Alps (Arc and Dora Baltea basins).
Samples for bulk-petrography and fission-track analysis were collected at different closure sections along the trunk, in order to investigate how the detrital signal evolves when detritus from different sub-basins is progressively added to the system. Fission-track analysis is a powerful integration tool to quantify sediments mixing if source areas experienced contrasting exhumation paths. Fission-track grain-age distributions provide not only information on long-term exhumation patterns, based on the age of the peaks,
but also provide first-order constraints on short-term erosion rates by comparison between the size of the peaks and the size of potential source areas. In the Dora Baltea catchment, the apatite load derives from two major fault-bounded blocks, the Western one yielding 43% of the total amount of apatite, and the Eastern one yielding the remaining 57%. In the Arc catchment, contribution is 29% from the Eastern Block, 14% from the Houiller-Subbriançonnais units and 57% from the Belledonne-Dauphinois units. We assessed apatite fertility in source-rocks by measuring apatite content in processed sediments, after checking for anomalous hydraulic concentrations by geochemical analyses. The lack of
compositional anomalies for elements between Y and Cr, largely hosted in ultradense minerals, grants that source-rocks distribution in the basin is faithfully reflected by detrital assemblages.
Results demonstrate that erosional processes were focused in different areas of the
Western Alps at long-term and short-term timescales, and are now concentrated in the
External Massifs. No clear relationship between erosion and climate or relief is observed in this sector of the belt, where endogenic forces may represent the main controlling factor on both long-term and short-term erosion rates.
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Barron-Majerik, Elizabeth. « Quantitative analysis of active compounds found in Arnica montana and Arnica chamissonis in relation to varied provenance, environmental and agronomic factors ». Thesis, University of the Highlands and Islands, 2011. https://pure.uhi.ac.uk/portal/en/studentthesis/quantitative-analysis-of-active-compounds-found-in-arnica-montana-and-arnica-chamissonis-in-relation-to-varied-provenance-environmental-and-agronomic-factors(1587f17d-7822-4c10-b687-5d1baaf09954).html.
Texte intégralRésumé :
The northern hemisphere plant Arnica montana L. can be found across Europe on high alpine slopes with acidic soils. The flowers are well documented as a source of natural products, particularly, active compounds associated with anti-inflammatory properties. The high demand for this extract has meant that wild plant numbers have reduced dramatically and now in many countries, it is illegal to harvest A. Montana from the wild. As a result, flowers from the non-endangered A. chamissonis Less. Have been employed for the production of extracts with similar properties. A. montana and A. chamissonis were both grown during the period 2004 to 2007 in the North of Scotland (Orkney) in order to determine whether this environment was condusive to high yield. The qualitative and quantitative effects of weeding, fertiliser, mulch, seed source and species on yield were also studied. This research found that A. montana had high quality extract but was prone to crown rot and was less robust than initial trials suggested. Conversely, while A. chamissonis grew vigorously, the extract contained approximately a third of the sesquiterpene lactone content.
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Tůmová, Helena. « Obchod s mramorem v pozdně antické Ravenně : archeologický materiál z komplexu San Severo ». Doctoral thesis, 2013. http://www.nusl.cz/ntk/nusl-327195.
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This thesis aims to study the commercial mechanism of Ravenna in the Late Antiquity from the point of view of the amount, type and provenance of the imported stone artefacts (fragments of architectural decoration, revetments slabs, opus sectile, sarcophagi), based on the study of archaeological material from the site of the basilica and the monastery of San Severo in Classe (Ravenna). Ravenna represented an important administrative and cultural center in the 5th and 6th century, connecting western and eastern artistic influences and focusing herself on trade and production. Determination of the stone artefacts from the San Severo locality was principally based on the archaeometric methods and on the combination of archaeologic and geologic approach as well. Specific archaeometric methods (macroscopic, geochemical and mineralogical-petrographic analyses) together with a quantitative evaluation were applied. Many scientific works, dedicated till this time to the art history of late antique Ravenna and dealing also the argument of ravennate "marbles" presumed the prevailing provenance from Proconnesos and usual commercial relations between Ravenna and Constantinople as well. Constantinople played a role of a mediator of oriental localities and Ravenna. The hypothesis concerning the provenance of the...
Livres sur le sujet "Quantitative provenance analysis"
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Alcorn, Rhona, Joanna Kopaczyk, Bettelou Los et Benjamin Molineaux, dir. Historical Dialectology in the Digital Age. Edinburgh University Press, 2019. http://dx.doi.org/10.3366/edinburgh/9781474430531.001.0001.
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Drawing on the resources created by the Institute of Historical Dialectology at the University of Edinburgh (now the Angus McIntosh Centre for Historical Linguistics), such as eLALME (the electronic version A Linguistic Atlas of Late Medieval English), LAEME (A Linguistic Atlas of Early Middle English) and LAOS (A Linguistic Atlas of Older Scots), this volume illustrates how traditional methods of historical dialectology can benefit from new methods of corpus data-collection to test out theoretical and empirical claims. In showcasing the results that these digital text resources can yield, the book highlights novel methods for presenting, mapping and analysing the quantitative data of historical dialects, and sets the research agenda for future work in this field. Bringing together a range of distinguished researchers, the book sets out the key corpus-building strategies for working with regional manuscript data at different levels of linguistic analysis including syntax, morphology, phonetics and phonology. The chapters also show the ways in which the geographical spread of phonological, morphological and lexical features of a language can be used to improve our assessment of the geographical provenance of historical texts.
Chapitres de livres sur le sujet "Quantitative provenance analysis"
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Vezzoli, G., M. Limonta, E. Garzanti et S. Yang. « Quantitative Provenance Analysis of Sediments in the Changjiang (Yangtze) River (China) ». Dans Geostatistical and Geospatial Approaches for the Characterization of Natural Resources in the Environment, 293–300. Cham : Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-18663-4_45.
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Piccinno, Luisa. « The Economic Structure of Maritime Trade Calling at the Port of Genoa Through the Analysis of General Average Data (Sixteenth–Seventeenth Centuries) ». Dans General Average and Risk Management in Medieval and Early Modern Maritime Business, 297–334. Cham : Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-04118-1_11.
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AbstractThis essay will discuss the preliminary results emerging from data extrapolated from General Average (GA) procedures in Genoa, between the last decade of the sixteenth century and the 1640s. The wealth of data provided by GA procedures compensates for some of the gaps in quantitative data which have held back research on the local maritime economy. Methodologically, this essay further develops the insights of Giuseppe Felloni’s work on GA’s potential for economic analysis. The rich documentation produced during GA procedures, from the original report (testimoniale) to the final apportioning of costs (calculus), provides details for typology of vessel, provenance, route, flag and cargo. This data sheds new light on Mediterranean maritime trade during a fundamental period of structural change, characterised by the emergence of new protagonists and the creation of new equilibria.
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Molinaroli, Emanuela, et Abhijit Basu. « Toward quantitative provenance analysis : A brief review and case study ». Dans Processes Controlling the Composition of Clastic Sediments, 323–34. Geological Society of America, 1993. http://dx.doi.org/10.1130/spe284-p323.
Texte intégralActes de conférences sur le sujet "Quantitative provenance analysis"
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Xu, Wei, Lei Fang, Jingyun Zou, Fuxin Guo, Yingchun Zhang et Kaiyuan Chen. « An Integrated Reservoir Predicting Approach with Geological Constraints from Stratigraphic Forward Modeling of the Miocene Fan Delta in Albert Basin, Uganda ». Dans International Petroleum Technology Conference. IPTC, 2021. http://dx.doi.org/10.2523/iptc-21481-ms.
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Abstract Reservoir prediction is a core area of research in oilfield exploration and development, and it is generally constructed on a combination of well data, seismic attributes or inversion. However, reservoir prediction in sparse well areas poses great challenges due to insufficient well control. If the quality of seismic data is poor, the spatial distribution characteristics of reservoirs cannot be effectively characterized through inversion or attribute analysis, which seriously affects the prediction accuracy. This paper proposes a new method to solve the difficulty in reservoir prediction of oilfields with sparse data and poor quality seismic cube, which evolves from depositional models, forward stratigraphic modeling (FSM) to geocellular modeling. First, based on the comprehensive analysis of core, seismic, grain size, heavy minerals, dip data, it is believed that a special fan delta developed in the Miocene strata in the south of Albert Basin. The reservoirs are dominated by distributary channels, which are in medium-coarse grains, and the provenance is from the southwest to flowing to the northeast. The formation thickness of the stratum decreases from the boundary fault to the direction of the basin. Then, the input parameters of FSM modeling are quantitatively expressed based on the sedimentary model research, including model boundary conditions, basic input information, sediment supply and transportation. FSM results were used to quantitatively characterize the deposition process. The FSM simulation results are compared with the depositional model and well data to verify the reliability. Finally, the shale content model in FSM results is resampled to the geocellular grids and used as the constraint for facies model and property model in geological modeling. This model is used for well pattern design and optimization. This new approach integrates the conceptual depositional model with quantitative FSM results. It improves the accuracy of reservoir prediction and provides a new technical workflow for reservoir characterization. Furthermore, it helps to obtain more insight into the sedimentary process and reduces the risk of oilfield exploration and development.
Rapports d'organisations sur le sujet "Quantitative provenance analysis"
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Knight, R. D., et H. A. J. Russell. Quantifying the invisible : pXRF analyses of three boreholes, British Columbia and Ontario. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/331176.
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Portable X-ray fluorescence (pXRF) technology collects geochemical data at a fraction of the cost of traditional laboratory methods. Although the pXRF spectrometer provides concentrations for 41 elements, only a subset of these elements meet the criteria for definitive, quantitative, and qualitative data. However, high-quality pXRF data obtained by correct application of analytical protocols, can provide robust insight to stratigraphy and sediment characteristics that are often not observed by, for example, visual core logging, grain size analysis, and geophysical logging. We present examples of geochemical results obtained from pXRF analysis of drill core samples from three boreholes located in Canada, that demonstrate: 1) Definitive stratigraphic boundaries observed in geochemical changes obtained from 380 analyses collected over 150 m of core, which intersects three Ordovician sedimentary formations and Precambrian granite. These boundaries could not be reconciled by traditional visual core logging methods. 2) Significant elemental concentration changes observed in 120 samples collected in each of two ~120 m deep boreholes located in a confined paleo-glacial foreland basin. The collected geochemical data provide insight to sediment provenance and stratigraphic relationships that were previously unknown. 3) Abrupt changes in the geochemical signature in a subset of 135 samples collected from a 151 m deep borehole intersecting Quaternary glacial derived till, sands, and ahomogeneous silt and clay succession. These data provide a platform for discussion on ice sheet dynamics, changes in depositional setting, and changes in provenance. Results from each of these studies highlights previously unknown (invisible) geological information revealed through geochemical analyses. A significant benefit of using pXRF technology is refining sampling strategies in near real time and the ability to increase sample density at geochemical boundaries with little increase in analysis time or budget. The data also provide an opportunity to establish a chemostratigraphic framework that complements other stratigraphic correlation techniques, including geophysical methods. Overall, data collected with pXRF technology provide new insights into topics such as spatial correlations, facies changes, provenance changes, and depositional environment changes.