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Добірка наукової літератури з теми "Offshore characterization"

Автор: Grafiati

Опубліковано: 10 березня 2023

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Статті в журналах з теми "Offshore characterization"

Ridge, I. M. L. "Torsional characterization of ropes used offshore." Journal of Strain Analysis for Engineering Design 43, no. 2 (February 1, 2008): 121–39. http://dx.doi.org/10.1243/03093247jsa243.

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The first part of this paper presents a general discussion of the various problems which must be addressed when combining different ropes in series or, in some cases, in using a rope in conditions where it is rotationally unrestrained. The paper will pay particular attention to the various classes of rope used in the offshore environment and their main torsional characteristics. In the second part, equipment is shown which is suitable for the measurement of the torsional response of various rope constructions at different levels of twist. Experimental data are presented for a variety of rope constructions at sizes comparable with those used in offshore applications. Comparison is made with data obtained in similar previous studies but with smaller‐diameter ropes.

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Gorton, Alicia M., and Will J. Shaw. "Advancing Offshore Wind Resource Characterization Using Buoy-Based Observations." Marine Technology Society Journal 54, no. 6 (November 1, 2020): 37–43. http://dx.doi.org/10.4031/mtsj.54.6.5.

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AbstractAs countries continue to implement sustainable and renewable energy goals, the need for affordable low-carbon technologies, including those related to offshore wind energy, is accelerating. The U.S. federal government recognizes the environmental and economic benefits of offshore wind development and is taking the necessary steps to overcome critical challenges facing the industry to realize these benefits. The U.S. Department of Energy (DOE) is investing in buoy-mounted lidar systems to facilitate offshore measurement campaigns that will advance our understanding of the offshore environment and provide the observational data needed for model validation, particularly at hub height where offshore observations are particularly lacking. On behalf of the DOE, the Pacific Northwest National Laboratory manages a Lidar Buoy Program that facilitates meteorological and oceanographic data collection using validated methods to support the U.S. offshore wind industry. Since being acquired in 2014, two DOE lidar buoys have been deployed on the U.S. east and west coasts, and their data represent the first publicly available multi-seasonal hub height data to be collected in U.S. waters. In addition, the buoys have undergone performance testing, significant upgrades, and a lidar validation campaign to ensure the accuracy and reliability of the lidar data needed to support wind resource characterization and model validation (the lidars were validated against a reference lidar installed on the Air-Sea Interaction Tower operated by the Woods Hole Oceanographic Institution). The Lidar Buoy Program is providing valuable offshore data to the wind energy community, while focusing data collection on areas of acknowledged high priority.

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Fainstein, Roberto, Ana Krueger, and Webster Ueipass Mohriak. "Ultra-deepwater seismic plays offshore Brazil — Future drilling off Santos and Campos Basins." Interpretation 7, no. 4 (November 1, 2019): SH99—SH109. http://dx.doi.org/10.1190/int-2018-0251.1.

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Contemporaneous seismic data acquisition in the Santos and Campos Basins offshore Brazil have focused on image characterization of deepwater and ultra-deepwater reservoirs and their relationship with hydrocarbons originating from synrift source rocks. Our interpretation has mapped the stratigraphy of postsalt turbidite reservoirs, and, on the presalt lithology, it has uncovered the underlying synrift sequences that embrace oil-bearing source rocks and the prolific, recently discovered, microbialite carbonate reservoirs. The new phase in geophysical data acquisition and offshore drilling that started in 1999 bolstered the Brazilian offshore petroleum production to record levels. The new, massive, nonexclusive, speculative 2D and 3D data acquisition surveys conducted offshore the Brazilian coast far exceed the amount of all existing cumulative vintage data. Deepwater drilling programs probed the interpreted new prospects. As whole, the modern geophysics data libraries offshore Brazil brought in the technology era to seismic interpretation, reservoir characterization, and geosteering operations in deepwater development drilling. Still, regional interpretation mapping of the outer shelf, slope, deepwater and ultra-deepwater provinces of the Santos and Campos Basins indicates plenty of prospective future drilling in the salt locked minibasins of the ultra-deepwater provinces. Salt tectonics shapes the architecture of these basins; hence, postsalt deepwater turbidite plays were readily interpreted from seismic amplitudes of the modern data that also allow for resolution images of the synrift source rocks, salt architecture, migration paths through faulting and salt windows, reservoir characterization, and regional seal mapping. The new techniques of prestack depth migration have enabled uncovering the imaging structure of the synrift that led to characterization of the presalt carbonate reservoirs and discovery of giant accumulations. Future offshore exploration will continue aiming at postsalt deepwater and ultra-deepwater minibasins plus presalt plays under the massive salt walls, still an underexplored frontier.

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Miura, Kazuo, Celso K. Morooka, Jose Ricardo P. Mendes, and Ivan R. Guilherme. "Characterization of operational safety in offshore oil wells." Journal of Petroleum Science and Engineering 51, no. 1-2 (April 2006): 111–26. http://dx.doi.org/10.1016/j.petrol.2005.11.018.

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Čekerevac, Damjan, Constança Rigueiro, and Eduardo Pereira. "17.06: Characterization of accidental scenarios for offshore structures." ce/papers 1, no. 2-3 (September 2017): 4341–50. http://dx.doi.org/10.1002/cepa.493.

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Wu, Lei, Muneesh Maheshwari, Yaowen Yang, and Wensheng Xiao. "Selection and Characterization of Packaged FBG Sensors for Offshore Applications." Sensors 18, no. 11 (November 15, 2018): 3963. http://dx.doi.org/10.3390/s18113963.

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With the development in the exploitation of maritime resources, the structural health monitoring (SHM) of offshore structures becomes necessary. This study focuses on addressing the practical issues of application of fiber Bragg grating (FBG) sensors for the SHM of offshore structures, in particular an FPSO (floating, production, storage, and offloading unit) vessel. Due to the harsh marine environment and tough working conditions, the FBG sensors must have sufficient protection and good repeatability for long-term monitoring. Thorough research has been conducted to identify the most suitable, commercially available protection packaging for FBG sensors for offshore applications. Further, the performance of the selected FBG sensor packaging is tested under conditions of strong sunlight, heavy rain, and salty water in order to emulate the marine environment. Moreover, the installation method of the packaged FBG sensors is equally important, as it ensures the repeatability and durability of the sensors for their long-term performance. It is shown that the packaged FBG sensors can be installed using resin-based epoxy to maintain the repeatability of the sensor over the long-term. Further, the packaged FBG sensors are installed and tested on a simple FPSO model. The experimental results under full load and ballast draft conditions show that the proposed FBG sensors are competent for the SHM of offshore structures.

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Williams, Ethan F., María R. Fernández-Ruiz, Regina Magalhaes, Roel Vanthillo, Zhongwen Zhan, Miguel González-Herráez, and Hugo F. Martins. "Scholte wave inversion and passive source imaging with ocean-bottom DAS." Leading Edge 40, no. 8 (August 2021): 576–83. http://dx.doi.org/10.1190/tle40080576.1.

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Geotechnical characterization of marine sediments remains an outstanding challenge for offshore energy development, including foundation design and site selection of wind turbines and offshore platforms. We demonstrate that passive distributed acoustic sensing (DAS) surveys offer a new solution for shallow offshore geotechnical investigation where seafloor power or communications cables with fiber-optic links are available. We analyze Scholte waves recorded by DAS on a 42 km power cable in the Belgian offshore area of the southern North Sea. Ambient noise crosscorrelations converge acceptably with just over one hour of data, permitting multimodal Scholte wave dispersion measurement and shear-wave velocity inversion along the cable. We identify anomalous off-axis Scholte wave arrivals in noise crosscorrelations at high frequencies. Using a simple passive source imaging approach, we associate these arrivals with individual wind turbines, which suggests they are generated by structural vibrations. While many technological barriers must be overcome before ocean-bottom DAS can be applied to global seismic monitoring in the deep oceans, high-frequency passive surveys for high-resolution geotechnical characterization and monitoring in coastal regions are easily achievable today.

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Pontes, M. T., G. A. Athanassoulis, S. Barstow, L. Cavaleri, B. Holmes, D. Mollison, and H. Oliveira-Pires. "An Atlas of the Wave-Energy Resource in Europe." Journal of Offshore Mechanics and Arctic Engineering 118, no. 4 (November 1, 1996): 307–9. http://dx.doi.org/10.1115/1.2833921.

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An atlas of the European offshore wave energy resource, being developed within the scope of a European R&D program, includes the characterization of the offshore resource for the Atlantic and Mediterranean coasts of Europe in addition to providing wave-energy and wave-climate statistics that are of interest to other users of the ocean. The wave data used for compiling the Atlas come from the numerical wind-wave model WAM, implemented in the routine operation of the European Centre for Medium Range Weather Forecasts (ECMWF), in addition to directional wave measurements from the Norwegian offshore waters.

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Akinlua, A., and N. Torto. "Geochemical Characterization of Offshore Western Niger Delta Source Rock." Petroleum Science and Technology 28, no. 3 (January 19, 2010): 236–47. http://dx.doi.org/10.1080/10916460903065926.

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LaBelle, Robert P., and James S. Lane. "Meeting the Challenge of Deepwater Spill Response." International Oil Spill Conference Proceedings 2001, no. 1 (March 1, 2001): 705–8. http://dx.doi.org/10.7901/2169-3358-2001-1-705.

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ABSTRACT Close to 25% of all oil and gas produced in the United States comes from offshore production. A new era for the Gulf of Mexico has begun with intense industry interest in deepwater (> 300 m) areas. Production from deepwater now represents about 46% of all U.S. offshore oil and 17% of U.S. offshore gas. Spill response plans and capabilities must be upgraded to meet the challenges of this new remote activity. This paper outlines a joint research effort underway between government and industry to address needed research on deep spill plume and trajectory behavior and surveillance. Major topics discussed include the application of results from a June 2000 deepwater experimental release of oil and gas offshore Norway, findings from several laboratory studies on plume characterization, and an upgraded numerical model for deep spill trajectories. There is much interest from the offshore industry as to how these research findings will be incorporated into federal review of oil spill response plans for deepwater projects.

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Дисертації з теми "Offshore characterization"

Mondrago, Quevedo Monica. "Probabilistic modelling of geotechnical conditions for offshore wind turbine support structures." Thesis, Cranfield University, 2014. http://dspace.lib.cranfield.ac.uk/handle/1826/9205.

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The geotechnical conditions of the soil can fluctuate greatly across the wind farm. This is an issue since geotechnical modelling is the base of the structural design of an offshore wind farm, and the efficient installation of the wind turbines depends on its accuracy. This paper deals with the characterization of the seabed, predicting the soil properties over the total affected area by a wind farm, with the challenge to reduce the required data samples in the site investigation under the number of installed wind turbines, to reduce its cost. It is compared the prediction outcome from two different interpolation methods, kriging and radial basis function, assessing their accuracy by the Mean-Squared Error and the Goodness-of-Prediction Estimate, as well as with a visual examination of their mapping; obtaining higher accuracy for radial basis function and reducing to half the required sample points, from the initial value of installed wind turbines. In a second stage it is studied the soil effect over the foundation, analyzing the results from a FEA, where different geometries of the structure are compared submitted to different load cases to check its limit states. Those results show that the foundation cost can increase four times due to the soil conditions, taking into account only the steel volume, and demonstrating how important is the soil characterization in the foundation design, as it gives the chance to relocate those wind turbines that require more expensive foundations.

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Ishutov, Sergey. "Tectonic characterization of the THUMS-Huntington Beach fault, offshore southern California." Thesis, California State University, Long Beach, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1591600.

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The THUMS-Huntington Beach fault branches from the Palos Verdes fault zone and south of that point forms the southwestern border of the Wilmington and Huntington Beach anticlines. Wilmington and Huntington Beach oil fields are located nearby, with timing and trapping mechanisms closely related to the evolution of the California Continental Borderland. The T-HBF, being part of Inner Borderland, is associated with change in vector of regional stress. Previously, this fault has been interpreted as a discontinuous feature. Correlation of newly acquired 2-D and existing industry 2-D and 3-D seismic and well data made it possible to identify that this is a right-slip fault zone with three segments. The T-HBF is striking northwest and has an average dip of 75° to the northeast. Wilmington and Huntington Beach anticlines are inverted basins formed as structural lows and then uplifted as a result of T-HBF activity in late Miocene-early Pliocene time.

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Raza, Arshad. "Reservoir Characterization for CO2 Injectivity and Flooding in Petroleum Reservoirs, offshore Malaysia." Thesis, Curtin University, 2017. http://hdl.handle.net/20.500.11937/57524.

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Reservoir characterization of the Malaysian gas reservoir for CO2 storage is carried out at preliminary and comprehensive level to provide insight into the storage capacity, injectivity, trapping mechanisms (structural, capillary, dissolution, and mineral), and containment. Screening tools are proposed in this study for the selections of reservoir, injection well, and injection zone along with CO2 residual trapping novel method, experimental assessment of compaction effect and numerical modeling scheme to improve the reservoir characterization.

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Amansure, Giovanni Ricardo. "Source rock characterization of the organic rich intervals of the Taranaki Basin, Offshore New Zealand." University of the Western Cape, 2015. http://hdl.handle.net/11394/5057.

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>Magister Scientiae - MSc
The Taranaki Basin is a large (ca. 330,000 km²) sedimentary basin found along the west coast of the northern island of New Zealand. The basin lies partly onshore but mostly offshore below the broad continental shelf to the west of central North Island. The Taranaki Basin is the first sedimentary basin to be explored in New Zealand and is currently New Zealand’s only hydrocarbon producing basin, with approximately 418 million barrels (MMbbl) of oil and 6190 billion cubic feet (bcf) of gas produced by the end of 2011. Most of New Zealand’s known oil and gas accumulations are geochemically typed to coaly facies of Late Cretaceous and Paleogene ages. The main objective of this thesis is to characterize the source rock quality of the organic rich intervals of the Taranaki Basin, namely, the Wainui Member of the North Cape Formation and the Rakopi Formation. The Rakopi Formation comprises terrestrially deposited coal measures, while the North Cape Formation is generally composed of marine rocks. These Formations make up the Pakawau Group. The objective will be achieved using two key methods. Firstly, the derivation of TOC logs using Passey’s log overlay method (Passey et al., 1990) and secondly, the generation of source rock quality maps (i.e. source rock richness mapping and source potential index mapping). This will integrate concepts relating to petrophysical wireline logs, seismic interpretation, core log information, geochemical analysis, depth mapping and isopach mapping. The results obtained from this study confirms the petroleum potential of the organic rich intervals of the Taranaki Basin. Using Passey’s method it was shown that excellent average percent TOC values are encountered for both the Wainui Member of the North Cape Formation and the Rakopi Formation. From source potential index mapping, it can be concluded that the Rakopi formation has a high source potential index (>1000SPI) on the continental shelf, which indicates that it has excellent potential for petroleum generation. The Wainui Member however, shows less potential for petroleum generation on the shelf, this being attributed to generally low net thicknesses on the shelf.

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Africa, Reagan Henry. "Reservoir Characterization using Genetic Inversion and Seismic attributes of Block 1 Orange Basin, Offshore South Africa." University of the Western Cape, 2016. http://hdl.handle.net/11394/5859.

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Magister Scientiae - MSc (Earth Science)
Block 1, Orange Basin is located offshore west coast South Africa. This study is focused on providing a solution to performing reservoir characterization in areas where well data is scanty by generating reservoir models using genetic inversion. The study area is represented by the extent of a 1500 km squared 3D seismic survey which is intersected by one well.

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Gigi, Nwabisa. "Reservoir distribution and characterization of lower cretaceous sands in block 2A of Orange Basin, offshore, South Africa." University of the Western Cape, 2017. http://hdl.handle.net/11394/6161.

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Magister Scientiae - MSc (Earth Science)
Orange Basin is a volcanic passive margin that forms part of the southwestern basins that were formed during the breakup of South America and Africa in Late Jurassic to Early Cretaceous. The basin comprises of numerous half grabens which are overlain by post rift fluvial deltaic sediments. This research study focuses on the distribution and characterization of the Albian deltaic sands across the Ibhubesi gas field. Geophysical and geological data such as 3D seismic data, wireline logs and core data from four wells (A-G 1, A-K 1, A-V1 and A-K 2) which tested the Albian reservoirs were integrated for a proper evaluation of the reservoirs. From Seismic interpretation and well correlation it is apparent that the Albian sands in the Ibhubesi gas field were deposited in a fluvial-deltaic environment. Seismic attributes have shown that the wells covered by the 3D seismic data were drilled on sweet spots of the channel axis of a deltaic system. These channels seem to be diverted by incised valleys across the entire field. Better sands are expected to develop down dip of the current field as splays in a pro-delta setting. Results obtained from petrography and petrophysical evaluations have revealed that quartzovergrowths are the dominant cement across all the Albian reservoirs of the four wells. Quartz precipitation most likely resulted from the circulation of waters during sediment compaction. Although these Albian sands are highly cemented with silica, porosities in most reservoir intervals range between 18% and 23%. These fairly good porosity values are mostly primary porosities protected from quartz-overgrowth by chlorite rims. The formation of chlorite from volcanic fragments pre-dates the development of quartz-overgrowth; hence the preservation of primary porosities. Secondary porosity is also present in some of the reservoir intervals resulting from leaching of unstable minerals. Permeabilities are generally low due to chlorite rims, quartz overgrowth and other authigenic clays such as kaolinite and illite which blocked pore connectivity. Resistivity logs had generally low readings over most hydrocarbon bearing zones due to the presence of chlorite in the sands.

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Esan, Adegbenga Oluwafemi. "High resolution sequence stratigraphic and reservoir characterization studies of D-07, D-08 and E-01 sands, Block 2 Meren field, offshore Niger Delta." Texas A&M University, 2002. http://hdl.handle.net/1969.1/234.

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Meren field, located offshore Niger Delta, is one of the most prolific oil-producing fields in the Niger Delta. The upper Miocene D-07, D-08 and E-01 oil sands comprise a series of stacked hydrocarbon reservoirs in Block 2 of Meren field. These reservoir sandstones were deposited in offshore to upper shoreface environments. Seven depositional facies were identified in the studied interval, each with distinct lithology, sedimentary structures, trace fossils, and wire-line log character. The dominant lithofacies are (1) locally calcite-cemented highly-bioturbated, fine-grained sandstones, (middle to lower shoreface facies); (2) cross-bedded, fine- to medium-grained well-sorted sandstones (upper shoreface facies); (3) horizontal to sub-horizontal laminated, very-fine- to fine-grained sandstone (delta front facies); (4) massive very-fine- to fine-grained poorly-sorted sandstone (delta front facies); (5) muddy silt- to fine-grained wavy-bedded sandstone (lower shoreface facies); (6) very-fine- to fine-grained sandy mudstone (lower shoreface facies); and (7) massive, silty shales (offshore marine facies). Lithofacies have distinct mean petrophysical properties, although there is overlap in the range of values. The highest quality reservoir deposits are cross-bedded sands that were deposited in high-energy upper shoreface environments. Calcite cements in lower shoreface facies significantly reduce porosity and permeability. Integration of core and wire-line log data allowed porosity and permeability to be empirically determined from bulk density. The derived equation indicated that bulk density values could predict 80% of the variance in core porosity and permeability values. Three parasequence sets were interpreted, including one lower progradational and two upper retrogradational parasequence sets. The progradational parasequence set consists of upward-coarsening delta front to upper shoreface facies, whereas the upward-fining retrogradational parasequence sets are composed of middle to lower shoreface deposits overlain by offshore marine shales. The limited amount of core data and the relatively small area of investigation place serious constraints on stratigraphic interpretations. Two possible sequence stratigraphic interpretations are presented. The first interpretation suggests the deposits comprise a highstand systems tract overlain by a transgressive systems tract. A lowstand systems tract is restricted to an incised valley fill at the southeastern end of the study area. The alternate interpretation suggests the deposits comprise a falling stage systems tract overlain by transgressive systems tract.

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Lovecchio, Juan Pablo. "Seismic stratigraphy of the offshore basins of Argentina : characterization and modeling of the South Atlantic passive margin dynamics." Electronic Thesis or Diss., Sorbonne université, 2018. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2018SORUS506.pdf.

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Ce mémoire traite de la formation et de l'évolution des bassins de la marge Atlantique argentine. Trois stades de rifting superposés ont été identifiés dans les bassins des Malvinas et de Colorado/Salado. Le premier événement de rifting est associé à la réactivation extensive, durant le Trias tardif, des chevauchements paléozoïques de la phase de Ventania-Cape. Un deuxième stade de rifting (Jurassique inférieur / moyen) a induit les failles contrôlant les principaux dépocentres et intersectant les structures plus anciennes. Finalement, l’extension du Crétacé inférieur liée à l’ouverture de l’Atlantique Sud s’est concentrée en périphérie de la marge continentale actuelle et a abouti à la mise en place de SDRs. L’évolution du bassin Malvinas a été caractérisée d’un point de vue sismique. Des nouveaux âges zircon U-Pb contraignent le rifting au Jurassique. Le nouveau modèle de rupture du Gondwana présenté ici met l'accent sur l'évolution des bassins mésozoïques péri-atlantiques. L’évolution post-rupture de la marge Atlantique argentine a également été étudiée via l’interprétation sismique et la caractérisation stratigraphique. Après la rupture Hauterivien / Barrémien, trois étapes d'évolution de la marge ont été identifiées. Le Crétacé est marqué par la subsidence thermique des principaux dépocentres. La marge devient une plate-forme continentale unique après la transgression régionale Maastrichtienne-Danienne. Le stade d’expansion du Paléogène est caractérisé par un affaissement et un apport sédimentaire centré au nord dans la région de Salado, tandis que le stade d’expansion du Néogène se caractérise par un comportement cylindrique de l’ensemble de la marge et par l’influence notable des courants de contour
This work is focused on basin formation and evolution in the Argentinean South Atlantic Margin and the Mesozoic breakup of SW Gondwana. Rifting evolution was studied in the Malvinas and Colorado/Salado basins. Three superimposed rifting events were identified in the latter. The first rifting event is associated with the Late Triassic extensional reactivation of Late Paleozoic thrusts of the Ventania-Cape fold belt. A second and main rifting stage (Early-Middle Jurassic) is related to faults forming the main depocenters and intersecting the older structures. Finally, Early Cretaceous extension linked to the opening of the South Atlantic Ocean focused on the outer continental fringe and produced emplacement of SDRs. The rifting evolution of the Malvinas basin was seismically characterized. New zircon U-Pb ages constrain rifting in the Jurassic. A new model for Gondwana breakup is presented with focus on the evolution of the Mesozoic peri-Atlantic basins. The post-breakup evolution of the Argentinean South Atlantic margin was also studied via seismic interpretation and stratigraphic characterization. Three stages of drift evolution were identified. After the Hauterivian/Barremian breakup, the Cretaceous drift unit is conditioned by the thermal subsidence over the main depocenters. Only after the Maastrichtian-Danian regional transgression, the margin becomes a single continental platform. The Paleogene drift stage is characterized by subsidence and sedimentary input centered in the Salado area, while the Neogene drift stage is characterized by a cylindrical behavior and the remarkable influence of contour currents

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VENTRONI, MASSIMILIANO. "On coastal flooding: from extreme offshore wave climate characterization to wave runup simulation with online-coupled numerical models." Doctoral thesis, Università degli Studi di Cagliari, 2017. http://hdl.handle.net/11584/249549.

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Coastal flooding is a topic of great relevance in the context of Coastal Engineering, particularly in the perspective of climate change and related sea level rise. Effective evaluation of coastal flooding at the hindcast, nowcast or forecast level, requires a high degree of interdisciplinary skills because of numerous aspects involved and different space and time scales usually considered. In particular, a peculiar perspective may be depicted by investigating the deep complementarity, as well as the close interrelation, coming up by the combined used of extreme value theory and advanced numerical modelling tools. As a matter of fact, numerical simulations are forced by offshore and/or nearshore boundary conditions, which, in the case of coastal flooding, are usually obtained by long-term statistical predictions of the sea state, related to the extreme regime of wave climate. The aim of this work is primarily focus on analysing and developing an operational methodology for the assessment of coastal flooding induced by extreme waves, with subsequent use of numerical modelling. In particular, the area of interest of wave climate analysis is related to the Sardinian coasts. It is evident how a reliable specification of boundary conditions is a fundamental component in numerical modelling. First of all, each dataset must formally fulfil correctness, representativeness, reliability and homogeneity characteristics. Unfortunately, even a rigorous assessment of the offshore boundary conditions is affected by an inherent uncertainty, due to the limited spatial and temporal extension which often characterizes a wave-climate dataset source. The sample size largely hinders the effectiveness of the asymptotical hypothesis, which is one of the cornerstones of the extreme value theory. On account of the above limitations, it is therefore still an open question in the literature whether upper limited (e.g. bounded Generalized Pareto) or upper unlimited (e.g. Weibull) distributions are most suitable for engineering purposes. Operationally, an investigation of the adequateness of the dataset at disposal is preliminary carried out. Next, several metrics are used to assess the effectiveness of most popular extreme wave distributions. Finally, the extreme, offshore sea states over the region of interest were computed. On the other hand, a plethora of numerical models have been implemented within the coastal community, with different levels of accuracy and complexity. A well-known and well-defined focused distinction is represented by the phase-averaged and phase-resolving approach. The main interest of this work is addressed to operational models, where outcomes’ accuracy criteria and non-prohibitive computational burden requirements should be well-balanced and properly considered. With this purpose in mind, an online coupling implementation between a spectral phase-averaged model and a non-hydrostatic phase-resolving model is provided. Specifically, two open-source models have been adopted as model components: the spectral SWAN model and the non-hydrostatic SWASH model. To sum up, the long term meteo-marine climate over the Sardinian coasts is evaluated first, by considering both mean and extreme characteristics of a heterogeneous dataset, previously deeply-corrected, ranging from waves to wind fields. From this, it is relatively straightforward to compute the offshore-boundary conditions. Second, a numerical coupled model involving two open source state-of-the-art models, was implemented, in order to enable a seamless and accurate chain simulation of an extreme sea state from offshore up to the shore.

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Conti, Claudio. "Small-scale physical modelling of piled foundations for offshore wind turbines application." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.

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Nowadays, finding alternative energy sources is becoming more and more important. Europe is particularly focusing on wind energy and in offshore wind energy especially. An issue concerning offshore wind energy which is gaining more and more attention is the noise emissions due to impact driven pile foundation. The noise caused by the installation process has been judged as “potentially dangerous for marine fauna” from the German Authorities. This research thesis is part of a project which examines a viable alternative installation method for the displacement of pile foundations for offshore wind energy called pile jacking. This technology should be developed to be cost-efficient, flexibly scalable and to produce considerably reduced vibration and air pollution emissions during its placement in the sea bed. Jacked piles technology would eliminate almost any noise deriving from the hammer impact. As most offshore piled foundations have been installed by impact driving technology, the question arises as to how piles with different the stiffness and the capacity , can otherwise be installed. In order to delineate the significant variables affecting the load-bearing capacity and especially the ultimate uplift capacity of a pile in saturated sand, a small-scale test campaign in scale 1:30 has been performed at the Test Center for Support Structures in Hanover. The campaign was supervised by the Department for Support Structures of Fraunhofer IWES. A testing schedule comprising of 15 small-scale geotechnical physical experiments was conducted on open-ended piles to an embedded length of 75 cm using two method of pile installation: static jacking and impact driving. The aim of this thesis is to obtain preliminary experimental data and set out the main features of this technology. The results obtained by this study reveal that static jacking installation lead to higher resistances and is overall beneficial to the mechanical load bearing behavior of pile foundations.

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Книги з теми "Offshore characterization"

M, Heffernan Linda, Coastal Marine Institute (Baton Rouge, La.), and United States. Minerals Management Service. Gulf of Mexico OCS Region, eds. Development and characterization of sea anemones as bioindicators of offshore resource exploitation and environmental impact. [New Orleans, La.]: U.S. Dept. of the Interior, Minerals Management Service, Gulf of Mexico OCS Region, 1999.

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Environmental Studies Program (U.S.) and United States. Minerals Management Service. Alaska OCS Region, eds. cANIMIDA Task 2, hydrocarbon and metal characterization of sediments in the cANIMIDA study area: Final report. Anchorage, Alaska]: Bureau of Ocean Energy Management, Regulation and Enforcement, 2010.

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Hong, Han Ping. The characterization and analysis of load and load effect uncertainties for fixed offshore structures and their code implications: Phase II. [Calgary, AB: National Energy Board, 1994.

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Hong, Han Ping. The characterization and analysis of load and load effect uncertainties for fixed offshore structures and their code implications: Phase I. [Calgary, AB: National Energy Board, 1993.

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Parker, Steven J. Geological, economic, and environmental characterization of selected near-term leasable offshore sand deposits and competing onshore sources for beach nourishment. Tuscaloosa, Ala: Geological Survey of Alabama, 1997.

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Lubinski, Arthur, and Stefan Miska. Developments in Petroleum Engineering: Offshore Drilling, Strength of Tubulars, Drilling Practices, Reservoir Characterization. Gulf Pub Co, 1988.

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Development & Characterization of Sea Anemones as Bioindicators of Offshore Resource Exploitation & Environmental Impact. Diane Pub., 1999.

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Characterization of offshore sediments in federal waters as potential sources of beach replenishment sand.: Final report on Phase I, cooperative agreement #14-35-0001-30666, to investigate sources of beach replenishment sand in federal waters offshore of New Jersey. Trenton, NJ: New Jersey Dept. of Environmental Protection, Division of Science and Research, Geological Survey, 1995.

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Частини книг з теми "Offshore characterization"

Janik, Vit, Sam Clark, Prakash Srirangam, Arjan Rijkenberg, and Sridhar Seetharaman. "Application of In-Situ Material Characterization Methods to Describe Role of Mo During Processing of Vbearing Micro-Alloyed Steels." In HSLA Steels 2015, Microalloying 2015 & Offshore Engineering Steels 2015, 289–95. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119223399.ch31.

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Wang, Xuelin, Chengjia Shang, and Xuemin Wang. "Characterization of the Multi-Pass Weld Metal and the Effect of Post-Weld Heat Treatment on Its Microstructure and Toughness." In HSLA Steels 2015, Microalloying 2015 & Offshore Engineering Steels 2015, 481–88. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119223399.ch57.

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Janik, Vit, Sam Clark, Prakash Srirangam, Arjan Rijkenberg, and Sridhar Seetharaman. "Application of In-Situ Material Characterization Methods to Describe Role of Mo During Processing of V-Bearing Micro-Alloyed Steels." In HSLA Steels 2015, Microalloying 2015 & Offshore Engineering Steels 2015, 289–95. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-48767-0_31.

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Wang, Xuelin, Chengjia Shang, and Xuemin Wang. "Characterization of the Multi-Pass Weld Metal and the Effect of Post-Weld Heat Treatment on Its Microstructure and Toughness." In HSLA Steels 2015, Microalloying 2015 & Offshore Engineering Steels 2015, 481–88. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-48767-0_57.

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Harders, Rieka, César R. Ranero, and Wilhelm Weinrebe. "Characterization of Submarine Landslide Complexes Offshore Costa Rica: An Evolutionary Model Related to Seamount Subduction." In Submarine Mass Movements and Their Consequences, 381–90. Cham: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-00972-8_34.

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Grohmann, Sebastian, Maria Fernanda Romero-Sarmiento, Fadi Henri Nader, Francois Baudin, and Ralf Littke. "Characterization of Potential Source Rock Intervals of Late Mesozoic to Cenozoic Age in the On- and Offshore Area of Cyprus and Their Impact on Petroleum Systems in the Eastern Mediterranean Sea." In Advances in Petroleum Engineering and Petroleum Geochemistry, 135–37. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-01578-7_32.

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"Soil characterization." In Frontiers in Offshore Geotechnics, 1031–128. CRC Press, 2005. http://dx.doi.org/10.1201/noe0415390637-19.

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Teillant, B., P. Chainho, A. Raventós, A. Sarmento, and H. Jeffrey. "Characterization of the logistic requirements for the marine renewable energy sector." In Renewable Energies Offshore, 983–91. CRC Press, 2015. http://dx.doi.org/10.1201/b18973-139.

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Pearce, Richard, and Paul Mayne. "Site characterization of Bootlegger Cove clay for Port of Anchorage." In Frontiers in Offshore Geotechnics. Taylor & Francis, 2005. http://dx.doi.org/10.1201/noe0415390637.ch113.

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"Angolan deepwater soil conditions: GIS technology development for sediment characterization." In Frontiers in Offshore Geotechnics II, 295–300. CRC Press, 2010. http://dx.doi.org/10.1201/b10132-27.

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Тези доповідей конференцій з теми "Offshore characterization"

Subramani, Hariprasad J., Krishnaraj Sambath, Lee D. Rhyne, Pankaj Nadge, and Damodaran Vedapuri. "Characterization of Wet Gas Flows." In Offshore Technology Conference. Offshore Technology Conference, 2017. http://dx.doi.org/10.4043/27900-ms.

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Goins, Neal R. "Reservoir Characterization: Challenges and Opportunities." In Offshore Technology Conference. Offshore Technology Conference, 2000. http://dx.doi.org/10.4043/11906-ms.

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McConnell, Daniel Russell. "Gas Hydrate Prospecting and Characterization." In Offshore Technology Conference. Offshore Technology Conference, 2019. http://dx.doi.org/10.4043/29604-ms.

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Leiceaga, Gorka G., Robert Balch, and George El-kaseeh. "Subsurface Characterization Using Ensemble Machine Learning." In Offshore Technology Conference. OTC, 2021. http://dx.doi.org/10.4043/31061-ms.

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Abstract Reservoir characterization is an ambitious challenge that aims to predict variations within the subsurface using fit-for-purpose information that follows physical and geological sense. To properly achieve subsurface characterization, artificial intelligence (AI) algorithms may be used. Machine learning, a subset of AI, is a data-driven approach that has exploded in popularity during the past decades in industries such as healthcare, banking and finance, cryptocurrency, data security, and e-commerce. An advantage of machine learning methods is that they can be implemented to produce results without the need to have first established a complete theoretical scientific model for a problem – with a set of complex model equations to be solved analytically or numerically. The principal challenge of machine learning lies in attaining enough training information, which is essential in obtaining an adequate model that allows for a prediction with a high level of accuracy. Ensemble machine learning in reservoir characterization studies is a candidate to reduce subsurface uncertainty by integrating seismic and well data. In this article, a bootstrap aggregating algorithm is evaluated to determine its potential as a subsurface discriminator. The algorithm fits decision trees on various sub-samples of a dataset and uses averaging to improve the accuracy of the prediction without over-fitting. The gamma ray results from our test dataset show a high correlation with the measured logs, giving confidence in our workflow applied to subsurface characterization.

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Low, Han Eng, Mark Felton Randolph, Cassandra Rutherford, Bernie B. Bernard, and James M. Brooks. "Characterization of Near Seabed Surface Sediment." In Offshore Technology Conference. Offshore Technology Conference, 2008. http://dx.doi.org/10.4043/19149-ms.

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Guttenplan, Katherine Jane Townsend, Marc Stephan Koopman, and Daniel L. Belin. "Environmental Sensitivity Modeling and Site Characterization." In Offshore Technology Conference. Offshore Technology Conference, 2019. http://dx.doi.org/10.4043/29255-ms.

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ullya, J. P., J. Sgambatti, J. S. Templetonb, Fugro McClelland, F. Perez, and E. Laya. "Geotechnical Characterization Of Rio Caribe Soils." In Offshore Technology Conference. Offshore Technology Conference, 1995. http://dx.doi.org/10.4043/7662-ms.

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Jeans, G., C. Cooper, C. Yetsko, and G. Bryan. "Squall Characterization in the Gulf of Mexico." In Offshore Technology Conference. Offshore Technology Conference, 2014. http://dx.doi.org/10.4043/25357-ms.

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Mesdag, P. R., and M. D. Schakel. "Improving Seismic Reservoir Characterization With Broadband Seismic." In Offshore Technology Conference. Offshore Technology Conference, 2015. http://dx.doi.org/10.4043/25668-ms.

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Audibert, Jean M. E., and Thomas K. Hamilton. "West Delta 58A Site Selection And Characterization." In Offshore Technology Conference. Offshore Technology Conference, 1998. http://dx.doi.org/10.4043/8764-ms.

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Звіти організацій з теми "Offshore characterization"

Author, Not Given. Workshop on Research Needs for Offshore Wind Resource Characterization. Office of Scientific and Technical Information (OSTI), October 2019. http://dx.doi.org/10.2172/1572142.

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Shaw, William, Caroline Draxl, Jeff Mirocha, Paytsar Muradyan, Virendra Ghate, Mike Optis, and Alexsandra Lemke. Workshop on Research Needs for Offshore Wind Resource Characterization: Summary Report. Office of Scientific and Technical Information (OSTI), October 2019. http://dx.doi.org/10.2172/1776618.

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Baldwin, Kim, Isis Fukai, Ken Miller, and John Schmelz. Characterization of Carbon Sequestration Targets of the Mid-Atlantic Coastal Plain and Adjacent Offshore Region. Office of Scientific and Technical Information (OSTI), September 2020. http://dx.doi.org/10.2172/1773049.

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Godec, Mike, Jalal Jalali, George Koperna, Gerald Hill, Anne Oudinot, Jack Pashin, Dave Riestenberg, Matt Wallace, and Ben Wernette. Characterization of Offshore Storage Resource Potential in the Central Planning Area of the Gulf of Mexico. Office of Scientific and Technical Information (OSTI), February 2021. http://dx.doi.org/10.2172/1836586.

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Nemeth, Kenneth, and Kimberly Gray. Review of Existing Characterization Data Interim Report for Southeast Regional Carbon Storage Partnership: Offshore Gulf of Mexico. Office of Scientific and Technical Information (OSTI), March 2019. http://dx.doi.org/10.2172/1836579.

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Zio, Enrico, and Nicola Pedroni. Uncertainty characterization in risk analysis for decision-making practice. Fondation pour une culture de sécurité industrielle, May 2012. http://dx.doi.org/10.57071/155chr.

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This document provides an overview of sources of uncertainty in probabilistic risk analysis. For each phase of the risk analysis process (system modeling, hazard identification, estimation of the probability and consequences of accident sequences, risk evaluation), the authors describe and classify the types of uncertainty that can arise. The document provides: a description of the risk assessment process, as used in hazardous industries such as nuclear power and offshore oil and gas extraction; a classification of sources of uncertainty (both epistemic and aleatory) and a description of techniques for uncertainty representation; a description of the different steps involved in a Probabilistic Risk Assessment (PRA) or Quantitative Risk Assessment (QRA), and an analysis of the types of uncertainty that can affect each of these steps; annexes giving an overview of a number of tools used during probabilistic risk assessment, including the HAZID technique, fault trees and event tree analysis.

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Bruno, Michael. Characterization of Pliocene and Miocene Formations in the Wilmington Graben, Offshore Los Angeles, for Large-Scale Geologic Storage of CO�. Office of Scientific and Technical Information (OSTI), December 2014. http://dx.doi.org/10.2172/1182545.

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Horner, Steve, and Iraj Ershaghi. An Advanced Fracture Characterization and Well Path Navigation System for Effective Re-Development and Enhancement of Ultimate Recovery from the Complex Monterey Reservoir of South Ellwood Field, Offshore California. Office of Scientific and Technical Information (OSTI), June 2006. http://dx.doi.org/10.2172/1109079.

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Steve Horner. An Advanced Fracture Characterization and Well Path Navigation System for Effective Re-Development and Enhancement of Ultimate Recovery from the Complex Monterey Reservoir of South Ellwood Field, Offshore California. Office of Scientific and Technical Information (OSTI), April 2006. http://dx.doi.org/10.2172/883169.

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Steve Horner. AN ADVANCED FRACTURE CHARACTERIZATION AND WELL PATH NAVIGATION SYSTEM FOR EFFECTIVE RE-DEVELOPMENT AND ENHANCEMENT OF ULTIMATE RECOVERY FROM THE COMPLEX MONTEREY RESERVOIR OF SOUTH ELLWOOD FIELD, OFFSHORE CALIFORNIA. Office of Scientific and Technical Information (OSTI), October 2004. http://dx.doi.org/10.2172/835278.

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