bluuebunny/crossref_metadata_2025_split huggingface dataset:
Processing of Sparsely and Irregularly Sampled 3D OBC Seismic Data Offshore Abu Dhabi
Authors: Nakayama Shotaro , Benson Mark Allen , Matarid Tarek , Belaid Kamal , Garden Mickael , Zarubov Dmitry 
Published: December 2015

Abstract
An OBC technique generally provides several technical advantages over a conventional towed streamer survey. However, due mainly to commercial and operational constraints, some compromises on survey parameters are required though dense and symmetric sampling is ideal. As a result, seismic data is often sparsely and irregularly sampled, leading to several challenges in processing of OBC seismic data offshore Abu Dhabi.
Conventional linear noise attenuations are not effective with Scholte waves as they are usually aliased with typical source and receiver sampling intervals in 3D OBC seismic data, and sometimes scattered because of near-surface heterogeneity offshore Abu Dhabi. To address this, we apply model-based surface wave attenuation, Surface Wave Analysis Modeling and Inversion (SWAMI), which enables an estimate of local near-surface properties and create noise model by analyzing dispersion curves. The method does not involve multi-channel filtering to the input data so both direct and scattered Scholte waves are effectively attenuated without suffering a lack of spatial sampling.
Matching Pursuit Fourier Interpolation (MPFI) is then implemented to enhance spatial sampling caused by acquisition geometry. MPFI is a frequency domain interpolation and regularization technique. Iterative process along with its anti-aliasing capability enables optimum data reconstruction for each frequency range at desired locations. In addition to regularization aspect, MPFI is targeted to densify receiver line interval and extend source lines with 5D implementation (4 spatial coordinates and time). This consequently enhances fold, offset and azimuth distributions of the data.
SWAMI for both direct and scattered Scholte waves and 5D MPFI are successfully implemented to address processing challenges related to insufficient spatial sampling in 3D OBC seismic data offshore Abu Dhabi. SWAMI deals with complex properties of Scholte waves and attenuates both direct and scattered ones without any processing artefacts. MPFI with 5D implementation dramatically improves spatial sampling. The several aspects of values of interpolation are recognized such as improvement of signal to noise ratio and stack response. Additionally, the interpolated data provides great potential to subsequent processes such as de-noise, de-multiple and imaging.
The results enhance the value of sparsely and irregularly sampled OBC seismic data, and indicate a possibility that seismic data with insufficient spatial sampling could achieve an equivalent data quality to dense and full azimuth survey.This consequently allows us to ease survey requirements related to spatial sampling criteria. Unlike a land case, these two techniques had not previously been applied to OBC data. This study, therefore, proved their applicability, reliability and benefits to 3D OBC survey.
Keeping Pace with Changing Well Integrity Management Demands
Authors: Smith Liane , Milanovic Dragan , Smith Colin , Halfawi Sami 
Published: December 2015

Abstract
This paper looks back at 10 years of addressing well integrity challenges and shows how operating company focus has changed over time. As field conditions have evolved and assets have aged, operators have acquired and sold assets and faced challenges for new conventional and unconventional well stock. Expectations of system integration have changed and the demand for real-time risk assessment and quantitative evaluation of well risk has increased. Keeping on top of the issues, controlling developing problems and reporting the situation clearly have remained high priorities for all operators. This presentation explores case histories over the past decade, specifically looking at changing field environments and operator expectations over that time.
The case histories explored include: The case where initial requirements for a giant oilfield excluded any contribution of corrosion to the integrity status of wells. Over 10 years, water cuts increased significantly and corrosion risks emerged as an important integrity threat. To respond to this, a real-time corrosion modelling approach was implemented to identify wells requiring batch inhibition to ensure tubing life meets initial design expectations.Several cases where changes in third party systems through time has required re-configuration of well integrity system interfaces to ensure seamless continuity in data access in line with IT developments.Cases where the understanding of, and need for, real-time risk evaluation has changed over time. Risk ranking, based upon the well failure model approach has become a routine requirement to capture common, easily identified, indicators of integrity threats in wells. In addition, operators have increasingly utilised quantitative risk data such as failure frequencies (failures/million hours) and mean-time-to-failure or survivability functions. The data has been used to define maintenance schedules, calculate the risk status of problem wells pre- and post-workovers and benchmark the overall reliability of completion components in one operation versus global performance.Cases where requirements to report well integrity has changed over time in line with company thinking and regulatory authority requirements. The improved capability of web-based visualisation has also evolved, and the paper discusses how this can be exploited to convey more decision-making information in a single page. The specific capability to track well events and operating conditions using software technology for the full lifecycle is also discussed.
Study of Electrostatic Oil/Water Separation by Ultrasound Monitoring: Comparison With Gravity Separation Process
Authors: Quintero C. G. , Passade-Boupat N. , Lauranson D. , Palermo T. , Sansevero B. 
Published: December 2015

The increasing number of off-shore projects has resulted in an important R&D effort to optimize the vessel sizes used for electrostatic dehydrators and desalters, otherwise known as electrocoalescers (ECS). Despite the maturity of this technology, the separator design remains mostly empirical. A very important part of the ECS has an inlet distribution device in the bottom of the vessel: similar to the gravity vertical separators or "Wash Tanks" separators configuration. In this last process, it has been found that the water drop accumulation at the oil water interface in a compact layer, so-called Dense Packed Zone (DPZ), plays a crucial role in the separation efficiency because it acts as a coalescence promoter. The objective of this work is to investigate the oil/water separation under an electrostatic or gravity field, in order to establish the presence and role of the DPZ in the separation mechanisms.
An open continuous loop pilot (DUSS), equipped with an ultrasound scanner and an electric tension generator, was used in this study. DUSS mimics the wash tank or ECS processes. Two crude oils with contrasted separation behaviors were studied.
Results show that in order to achieve an optimal separation, it is important to control the inlet flow rates to form a stable DPZ with an optimal thickness, either by gravity or electrostatic separation. In the electrostatic case, the electric field placed into the oil zone improves the coalescence of smaller drops that are not able to settle under the gravity field. Then, some of these bigger droplets feed the DPZ, increasing its thickness and the overall separation efficiency.
Nevertheless, the DPZ should not reach the electric field in order to avoid shortcuts. Over this configuration, it is possible to successfully apply a modeling approach used for vertical gravity separation, known as the Dispersion Band Model.
The robust experimental data obtained provides an interesting base for the understanding of one of the most classical electrostatic separation processes, useful information for the process optimization.
Nano Graphene Application Improving Drilling Fluids Performance
Authors: Taha Norasazly Mohd , Lee Sean 
Published: December 2015

Abstract
Scomi together with the technical partner had developed series of nano graphene engineered product in mass production scale, one of the latest product that had been field trial successfully in the region is a graphene enhanced product that provides superior lubricity and thermal stability to the water based drilling fluids. It is a blend of proprietary surfactants engineered with nano graphene, where graphenes will penetrates into microscopic pores of the tubular metal, crystalized in layers under high pressure, forming a protective film to improve lubricity, prevent bit balling, improve BHA's life span, improve ROP, and most important of all improving fluids' thermal stability.
Laboratory performance test with EP/Lubricity Tester indicated 70–80% torque reduction on a water based salt polymer mud system, compared to conventional lubricants of only 30–40% reduction. The product had been field trial in a HTHP onshore well with temperature up to 176°C (349°F), and hard formation reducing the bits' life span to only 2–3 days. During the field trial, it's agreed that 2–3% of the product had improved ROP 125%, actual reaming torque reduction of 20%, bit's life span increased &gt;75%, also noticed by the fluids company Scomi that fluids loss reduction of 30% with 40% polymers concentration reduction compared to planned mud formulation, which are additional benefits observed and yet to be continously monitor in future subsequent field trials. The improvement in drilling performance and bits' life span had reduced operator's operational time and cost.
With the success of the first field trial on nano graphene engineered drilling fluids, Company is in the midst of developing series of graphene enhanced product to cater more challenging drilling and production conditions.
Modeling and Optimization of Horizontal Well Completions Located in Gas Injection Patterns of Hassi Messaoud Oilfield
Authors: Mahboub Youcef , Otmanine Mohamed , Salhi Bachir 
Published: December 2015

Abstract
In The giant Hassi Messaoud Oilfield, horizontal and short radius wells are mostly crossing more than one layer and many of them are crossing two compartments, where gas breakthrough is occurring in some layers and compartments. There are three main objectives of the present study. Firstly, is to improve oil productivity while reducing the gas breakthrough production. The second aim is to preserve the accumulated injected gas gained over decades of time. The third objective is to maintain the miscibility conditions within some injection gas patterns as initially planned.
Two principles have been used to complete the study. The first one is the composite inflow performance relationship "IPR" between oil and gas reservoir systems crossed by a horizontal well, whereas the second option is a smart well completion implementation and modeling of horizontal wells crossing two layers having two reservoir pressures due to gas injection wells.
Three categories of results have been obtained. Primarily, well modeling and optimization of horizontal well without smart completion, and secondly an implementation of intelligent completion model for horizontal well crossing different intervals in gas breakthrough. Some scenarios of optimizations have been done based on the available input of well. Finally, it will be possible to maintain the miscibility conditions within a gas injection pattern using the intelligent completion option.
Understanding the Impact of Hydrocarbon Co-absorption Losses on Revenues from Your Gas Plants: The Reality Through Life-Cycle Costs Analysis
Authors: Chilukuri Pavan , Bowerbank Gary , Bhattacharya Arnav 
Published: December 2015

Abstract
Gas development projects face growing challenges from increasingly sour resources with relatively high levels of CO2, H2S, Mercaptans and COS, and tighter sales specifications and stricter environmental emission standards. The removal of trace components such as COS and RSH can have detrimental effect on project value as considerable CAPEX and OPEX investments have to be made.
Predominantly mercaptans are either removed in Acid Gas Removal Unit (AGRU) with the use of hybrid solvents such as Shell's Sulfinol solvent, or slipped to downstream dehydration/mercaptan removal adsorption unit using molsieves. While the former line-up involves a single process unit to remove all sulphur compounds (H2S, RSH and COS) and CO2, the latter process line-up involves multiple process steps including an AGRU absorber with aqueous amines to remove H2S and CO2, and a molecular sieve downstream unit to dehydrate and remove mercaptans in combination with a dedicated physical or hybrid solvent for removal of mercaptans from molsieve regeneration gas.
There is the perception that the use of hybrid solvents reduces revenue through hydrocarbon absorption losses. Simple hydrocarbon-loss percentages around AGRU absorber provide some insight, but this data must be used cautiously, as this data alone will not tell the full story.
Previous work has shown that, in most cases, higher hydrocarbon losses through co-absorption with hybrid solvents compared with using aqueous amines such as methyl diethanolamine (MDEA) are offset by savings in reboiler energy consumption. This paper goes a step further by modelling the full life-cycle costs of the two conventionally used process line-ups so that informed solvent-selection and capital investment decisions can be made. This paper also discussed capital- and additional operating-cost savings associated with hybrid solvents, which further tip the economic balance in favour of hybrid solvent systems.
Retarded HF Acid System to Deeply Stimulate Sandstone Formation and Eliminate the Needs of Pre-Flush and/or Post-Flush Acid Stages: Experimental and Field Cases
Authors: Gomaa Ahmed M. , Stolyarov Sergey , Cutler Jennifer 
Published: December 2015

Abstract
The goal of sandstone matrix acidizing is to remove siliceous particles such as formation clay, feldspar, and quartz fines that are blocking or bridging pore throats. This is accomplished by injecting acid formulations containing hydrofluoric (HF) acid or its precursors, as HF is the only common acid that dissolves siliceous particles sufficiently. Standard treatments include pre-flush and/or post-flush stages of HCl acid to minimize the potential for calcium fluoride and other secondary precipitation. However, there is no guarantee that the HF acid stage will follow the path of the preflush stage; therefore, precipitation could still occur. In addition, the fast reaction of HF acid with clay minerals presents another challenge to effectively stimulating deep sandstone formations.
This paper presents experimental and field case studies with a sandstone acidizing treatment designed to retard the HF reaction rate and enable single-stage treatment – eliminating the pre- and post-flush HCl acid stages and thereby reducing treatment complexity and the associated treatment rig time.
Extensive laboratory testing was performed using a variety of quarried sandstone cores with varying amounts of clay minerals, feldspar, and carbonate to confirm the ability to stimulate a wide range of sandstone formations. Also, formation core material was evaluated to confirm the results. Static solubility tests indicated that around 80% of the treated formation was soluble in the new acid system formulation. Coreflood testing noted an improvement in permeability of as much as 326%. Also, corrosion tests conducted using different metallurgy showed a very low corrosion rate (less than 0.005 lb/ft2 for N-80 and less than 0.02 lb/ft2 for Cr-13). Using coiled tubing, the new design was injected into three deep offshore wells, resulting in injectivity increases of 227%, 236%, and 256%.
O ENGAJAMENTO NO CONTO AFRICANO
Authors: Estrelita dos Santos Menta Salves Guadalupe 
Published: December 2015

<p><span>O presente artigo tem por base uma análise do conto africano<span class="apple-converted-space"> </span><em>A Estória do Ladrão e do Papagaio</em>, de José Luandino Vieira, com ênfase na construção da narrativa. Este trabalho demonstrará as funções da arte e, conseqüentemente da literatura, pondo em questão as controvérsias do termo "engajamento", segundo Theodor Adorno e Jean-Paul Sartre. Em se tratando de construção narrativa, percorrem-se também as trilhas da visão dialógica bahktiniana, inserindo-a nos procedimentos de denúncia que revelam a opressão dos povos africanos, marginalizados e assujeitados.</span></p>
INTELIGÊNCIAS MÚLTIPLAS PROCESSADAS PELAS ATIVIDADES DE LITERATURA: EXPERIÊNCIAS VIVIDAS NO ENSINO MÉDIO
Authors: Fatima Menegazzo Nicodem Maria 
Published: December 2015

<p>O artigo <strong>INTELIGÊNCIAS MÚLTIPLAS PROCESSADAS PELAS ATIVIDADES DE LITERATURA: <em>EXPERIÊNCIAS VIVIDAS NO ENSINO MÉDIO</em></strong>, trata de experiências vivenciadas durante o ano letivo de 2000, pela autora, docente do ensino médio e seus alunos, no intuito de se proporcionar prazer aos protagonistas do processo ensino-aprendizagem de literatura. Inclui também registros sobre as Inteligências Múltiplas, de constatações auferidas durante o tempo em que duraram as atividades letivas. Por final, o presente artigo procura propiciar um entrelaçamento entre literatura, teatro, inteligências múltiplas e a própria vida.</p>
Do sagrado ao profano: a Urbes em Ragtime
Authors: Fred Cardoso de Oliveira Wilton 
Published: December 2015

<p>O presente ensaio, baseado no romance <em>Ragtime,</em> de E. L. Doctorow, é uma análise da cidade na alta modernidade, de suas contradicões, desumanização e dessacralização, tendo como contraponto a <em>Urbes greco-romana,</em>espaço este produzido para o povo. Procura-se mostrar nesse percurso a exteriorização da cidade, que de local para o homem, transformou-se em local no qual a liberdade humana foi sacrificada, face à profanação do sagrado: família, tradição, produção; resultado da nova ordem econômica implantada pela modernidade.</p>
A expressão do tempo futuro – forma sintética x perífrase
Authors: Do Carmo Polli da Silva Rita 
Published: December 2015

<p>Há em curso, no Português do Brasil (doravante PB), mudanças no tocante ao uso do tempo futuro. A expressão deste tempo não se dá somente com a forma verbal chamada <em>futuro. </em>Esta construção se dá também com a perífrase <em>ir + infinitivo </em>e outras estruturas que podem expressar <em>futuridade: estar + gerúndio,</em> por exemplo<em>, </em>ou a presença de advérbios.Análise em diversos córpus do PB vem evidenciando um franco declínio no uso do chamado futuro sintético (amarei) em detrimento da perífrase, principalmente <em>ir + infinitivo (</em>vou amar). Tendo em vista este fato vamos testar em que medida alunos do 2<sup>o </sup>ano do ensino médio, submetidos à pressão de uma avaliação escolar, ainda empregam a forma ensinada pelas escolas (sintético) e como algumas obras literárias vêm expressando o futuro.<strong></strong></p>
Baudolino e a literatura picaresca
Authors: Ricardo Fioruci Wellington 
Published: December 2015

<p>Tendo em vista a importância dos recursos intertextuais e paródicos no que concerne aos estudos de análise literária comparativa, é possível observar um intenso diálogo entre as obras picarescas espanholas dos séculos XVI e XVII e o romance medievalista de Umberto Eco, <em>Baudolino</em> (2000). O presente artigo busca traçar uma ponte intertextual entre essas obras, destacando os recursos literários presentes na construção da obra que aproximam o discurso ficcional do histórico.</p>
Simbolismo francês e Modernismo brasileiro: um olho em Vinícius de Moraes
Authors: Poletto Juarez 
Published: December 2015

<p>A primeira parte deste trabalho parafraseia estudos de Hugo Friedrich e Anna Balakian sobre a poesia francesa do século XIX, acrescidos de algumas observações pessoais; a segunda, apresenta uma leitura das passagens do Prefácio Interessantíssimo que mais se aproximam das posturas poéticas dos franceses citados; a terceira estuda as epígrafes que iniciam as cinco partes da obra <strong>Forma e Exegese </strong>de Vinícius de Moraes, bem como as citações específicas em alguns poemas. Desprezam-se as epígrafes que não pertencem aos poetas franceses já nomeados.</p>
Poética da tensão
Authors: Poletto Juarez 
Published: December 2015

<p>Este estudo desenvolve análise de poemas do livro <strong>A rosa do povo</strong>, de Carlos Drummond de Andrade, para mostrar os vários níveis de tensão nele existentes, isto é, ampliar a visão do impasse <em>sério/vulgar</em>, já discutido por outros analistas, e ver como se desenvolvem as tensões temáticas, temporais, metapoéticas, formais e ideológicas.<strong></strong></p>
A heterogeneidade no discurso do professor de Língua Portuguesa
Authors: Neiva Surdi da Luz Mary 
Published: December 2015

<p>Este texto tem como objetivo analisar o discurso do professor de língua portuguesa sobre as suas práticas em sala de aula e suas relações com a Proposta Curricular de Santa Catarina, discutindo como esses sujeitos se identificam com as formações discursivas que representam a voz do Estado e se é possível identificar em seus discursos marcas do que é diferente no interior do mesmo, marcas da heterogeneidade constitutiva. Tomamos por base teórica a Análise de Discurso de Linha Francesa, nas noções de forma-sujeito, conceituadas a partir de Pêcheux (1995) e de formação discursiva heterogênea apresentada por Indursky (2002). Para construir a análise utilizamos como <em>corpus</em> recortes discursivos de falas professores de língua portuguesa.</p>
Psicanálise e literatura: o complexo de Édipo em alguns contos de Dalton Travisan
Authors: Machado de Almeida Tatiane , Caixeta Nascentes Zama 
Published: December 2015

<p>A intenção deste estudo é a de reunir os resultados de uma pesquisa que promoveu a relação entre a psicanálise e a literatura. Foram aplicados alguns conceitos de Sigmund Freud aos contos <em>O pai, o chefe e o rei</em> e <em>O caçula</em> de Dalton Trevisan. Tomando-os como objeto de análise e reconhecimento do funcionamento psíquico, utilizou-se especificamente a noção de complexo de Édipo. Sendo assim, a teoria psicanalítica é utilizada para explicar as razões de alguns aspectos da vida das personagens criadas por Trevisan.</p>
EXPERIÊNCIA DE LEITURA COM O GÊNERO LITERÁRIO CONTO EM SALA DE AULA COM BASE NO PLANEJAMENTO PEDAGÓGICO
Authors: Sampaio Maria Lúcia Pessoa 
Published: December 2015

<p class="Resumo"><span lang="EN-US">Esse estudo assume a interface entre leitura e planejamento pedagógico. Objetiva-se, aqui, focalizar as práticas de planejamento de leitura, voltadas para a implementação do gênero literário “conto” em sala de aula. Das cinco sessões de leitura de contos literários (transcritas e gravadas) que se constituíram <em>corpus</em> da pesquisa-ação, elegeu-se, para esta análise a quarta sessão. Os resultados apontam para a importância do planejamento, que desempenha a função mediadora, na medida em que ao plano foi atribuído o estatuto de instrumentalizar a ação docente, servindo à professora como guia para discussão do texto, ora atribuindo uma função utilitária, ora dando significado ao discurso literário, como instância provedora de prazer.</span></p>