bluuebunny/crossref_metadata_2025 huggingface dataset:
DESAFIOS DO CIRURGIÃO-DENTISTA DA REDE PÚBLICA DO MUNICÍPIO DE TERESÓPOLIS PARA O ATENDIMENTO DE PACIENTES COM TRANSTORNO DO ESPECTRO AUTISTA
Authors: Silva Alicia Kler Figueira da , Batista Roberta M.
Published: November 2024

O Transtorno do Espectro Autista (TEA) é um distúrbio que é avaliado em diferentes graus de suporte e começa a apresentar os primeiros sinais na infância, como dificuldade na comunicação, linguagem e comportamento. Seu diagnóstico é muito importante para que se realize o tratamento específico para cada caso. Os pacientes com esse tipo de transtorno devem ser atendidos por uma equipe multiprofissional, incluindo cirurgiões-dentistas. Porém, ainda existem dificuldades para estes profissionais quando precisam realizar o atendimento desses pacientes, em especial pela dificuldade no manejo e comunicação com os mesmos. Este trabalho teve como objetivo analisar a perspectiva dos cirurgiões dentistas em relação às dificuldades que sentem para atender pacientes com transtorno do espectro autista, e orientá-los sobre a importância de saber métodos e estratégias que visem um atendimento odontológico seguro e de qualidade. A pesquisa foi realizada através de um questionário feito com cirurgiões dentistas do município de Teresópolis, para discutir sobre as dificuldades que eles encontram no atendimento em pacientes com transtorno do espectro autista, além da conversa em palestra sobre as possibilidades e estratégias de manejos de comportamento para o atendimento de pacientes com transtorno de espectro autista no Sistema Único de Saúde. Dos 35 profissionais, 25 participaram da pesquisa. Apenas os que possuíam menos de 5 anos de formação relataram ter tido uma disciplina específica sobre pacientes com TEA durante a graduação. 18 profissionais não conhecem o Manual de Diagnóstico de Transtornos Mentais. Alguns dentistas justificaram sua insegurança em atender pacientes com TEA devido à falta de capacitação, recursos, medo de traumatizar o paciente ou falta de experiência. Esses resultados destacam a necessidade de maior capacitação e suporte para os dentistas no atendimento a pacientes com este transtorno, tanto na formação acadêmica quanto na prática profissional.
USO DO LASER DE ALTA POTÊNCIA NA CORREÇÃO DO AUMENTO GENGIVAL: RELATO DE CASO
Authors: Defante Gabriel Rosa , Rodrigues Walmir Júnio de Pinho Reis , Moraes Marcia Cristina Dias de
Published: November 2024

A instalação de aparelhos ortodônticos fixos é um fator determinante para o acúmulo de biofilme na cavidade oral. A falta de controle adequado do biofilme nesses casos contribui para a modificação da composição do biofilme, favorecendo ao aparecimento de manifestações inflamatórias do tecido gengival, culminando no aumento gengival. Esta manifestação pode se tornar crônica uma vez que os tecidos gengivais aumentados se tornam um obstáculo aos procedimentos de controle do biofilme, gerando desconforto e insatisfação aos pacientes. Nesse contexto, o objetivo deste artigo é relatar um caso clínico de excisão cirúrgica de aumento gengival em paciente ortodôntico por meio da utilização do laser de alta potência. Paciente do sexo masculino, 18 anos de idade, melanoderma e portador de púrpura foi encaminhado por sua ortodontista para correção do aumento gengival. Diante do quadro apresentado foi planejada a terapia básica periodontal seguida de excisão cirúrgica do tecido gengival aumentado por meio do laser de alta potência de diodo. Após os procedimentos iniciais relacionados ao controle do biofilme foram executados dois tempos cirúrgicos seguidos de reforço das instruções de higiene oral. Considerando o estado sistêmico geral do paciente, concluímos que a excisão dos tecidos gengivais com o laser de alta potência possibilitou um procedimento confortável, proporcionando menor sangramento no trans e pós cirúrgico, resultando num padrão adequado de cicatrização.
AVALIAÇÃO DO EFEITO DE DIFERENTES SUBSTÂNCIAS PIGMENTANTES EM RESTAURAÇÕES DE RESINAS COMPOSTAS
Authors: Emerick Gabriel Macario , Fernandes Leandro J.
Published: November 2024

Com os avanços tecnológicos, os pesquisadores e as indústrias odontológicas tentam desenvolver materiais com características que melhorem a estética e ao mesmo tempo a longevidade clínica. Sabe-se que a superfície de um material restaurador influencia diretamente na estética e na sua longevidade clínica, indicando o sucesso ou insucesso desse material. Os tratamentos estéticos, atualmente, são os mais procurados, uma vez que um novo padrão de beleza é requisitado pelos pacientes, que anseiam por dentes alinhados, bem contornados e brancos, o que leva um número cada vez maior de pacientes a procurar os profissionais para essa finalidade. Dentre os tratamentos estéticos, destacam-se as restaurações de resina composta. A resina composta, apesar de ser tão procurada, apresenta algumas desvantagens, sendo uma das quais o fato de que, quando exposta a certas substâncias e influências no meio oral, estas fazem com que sofra mudança de cor e consequentemente, ocorre a perda do padrão estético que se desejava.
O DESENVOLVIMENTO DO SISTEMA ESTOMATOGNÁTICO E SUA RELAÇÃO COM A AMAMENTAÇÃO
Authors: Azeredo Gabriela Cascardo Cernadela , Gonçalves Sandro S.
Published: November 2024

O sistema estomatognático (SE) desempenha um papel crucial no corpo humano, envolvendo ossos, músculos, dentes e articulações. O aleitamento materno exclusivo durante o desenvolvimento craniofacial contribui para um SE saudável, evitando problemas como más oclusões dentárias. A amamentação fortalece os músculos mastigatórios, promove o crescimento adequado do maxilar e mandíbula e ajuda na correta posição da língua, influenciando positivamente as funções de mastigação e fonoarticulatórias. Interrupções precoces na amamentação podem ter impactos negativos no desenvolvimento oral. Esta revisão analisa o desenvolvimento do SE nos primeiros seis meses de vida, destacando a importância do aleitamento materno exclusivo e compreendendo seus benefícios para o bebê e a mãe. Conclui-se que o aleitamento materno exclusivo nos primeiros seis meses é vital para o desenvolvimento do SE, prevenindo problemas orofaciais, oferecendo benefícios imunológicos e nutricionais ao bebê, além de vantagens biológicas e psicológicas para a mãe. Por outro lado, a amamentação artificial e hábitos de sucção não nutritivos podem afetar negativamente o desenvolvimento oral, destacando a importância da promoção do aleitamento materno para a saúde de ambos e a prevenção de complicações futuras.
ASSOCIAÇÃO ENTRE A DOENÇA PERIODONTAL E DOENÇA DE ALZHEIMER: REVISÃO DE LITERATURA
Authors: Rosa Gleycielle Batista da , Silva Junior Gilberto F. da
Published: November 2024

A periodontite é uma doença inflamatória crônica multifatorial, iniciada por um processo de disbiose no biofilme dental. É caracterizada pela destruição do tecido conjuntivo e do osso alveolar. A Doença de Alzheimer (DA) é uma doença neurodegenerativa. É a causa mais comum de demência e está se tornando um importante problema de saúde com o envelhecimento populacional em todo o mundo. Em pacientes com DA, a periodontite pode ser ainda mais comum, uma vez que a capacidade de cuidar da higiene bucal diminui à medida que a doença progride. Estudos sustentam a hipótese que condições inflamatórias crônicas, características da periodontite, poderiam estar associadas ao aumento do declínio cognitivo presente na iniciação e progressão da DA. Sendo assim, este trabalho teve como objetivo principal avaliar a possível associação entre periodontite e DA através de uma revisão de literatura. O material pesquisado foi selecionado através do banco de dados Pubmed. A análise da literatura pesquisada nos permitiu concluir que: os estudos epidemiológicos sugerem uma associação entre a periodontite e a DA, em que a primeira poderia aumentar o risco para a segunda ou agravá-la em pacientes que já apresentam sintomas de degeneração neurológica ou declínio cognitivo. Além disso, o processo inflamatório determinado pela doença periodontal estaria associado à perda de domínio cognitivo e à perda progressiva das funções cerebrais. O Porphyromonas gingivalis se destaca devido às suas características e virulência, como tendo um papel importante na manutenção da disbiose que resultaria nos processos degenerativos característicos da DA.
SÍNDROME DA FIBROMIALGIA E DISFUNÇÃO TEMPOROMANDIBULAR
Authors: Pinheiro Grace Kelly Sobreira , Marchon Renata N. B.
Published: November 2024

A dor, por definição, é uma experiência sensorial e emocional desagradável, sendo uma condição complexa porque se trata de uma dor física e emocional e está associada a experiências vividas únicas. A Disfunção Temporomandibular (DTM) é de etiologia multifatorial, complexa, podendo ser causada por transtornos do sistema estomatognático e pode estar associada ao estresse, depressão, ansiedade, macrotraumas, microtraumas, hábitos parafuncionais, dentre outros. A fibromialgia é de etiologia desconhecida, tendo como característica a dor musculoesquelética generalizada por mais de três meses. Pacientes com fibromialgia são mais propensos a apresentarem DTM, havendo grande associação e alta prevalência de sinais e sintomas.
A INFLUÊNCIA NEGATIVA DOS FATORES PSICOLÓGICOS NA MANIFESTAÇÃO E PROGRESSÃO DA DOENÇA PERIODONTAL
Authors: Melo Helena Braune , Rodrigues Walmir Júnio de Pinho Reis
Published: November 2024

Sabe-se que a doença periodontal é multifatorial e a presença do biofilme é seu principal fator etiológico. Contudo, sua manifestação e progressão pode ser influenciada de forma negativa por diversos fatores psicossociais como o estresse, a ansiedade e a depressão. A proposta desse trabalho foi realizar uma revisão da literatura sobre a associação entre a doença periodontal e fatores psicológicos negativos. Existem dois mecanismos que evidenciam a relação entre essas duas condições patológicas: a via biológica, em que mecanismos fisiológicos alterados tornam o periodonto mais suscetível à progressão da doença periodontal e a via comportamental, na qual ocorre a negligência dos hábitos de higiene oral, promovendo aumento da exposição do periodonto à agressão bacteriana. Dessa forma, evidenciou-se que o aumento da severidade da doença periodontal foi mais prevalente em pacientes acometidos por psicopatologias. A conduta terapêutica associada aos fatores psicológicos negativos parece ser benéfica à saúde periodontal.
A ABORDAGEM CIRÚRGICA NO TRATAMENTO DA OSTEORRADIONECROSE
Authors: Caldas João Gabriel Garbelini , Moraes Marcia Cristina Dias de
Published: November 2024

A osteorradionecrose é caracterizada como uma complicação debilitante que pode ocorrer em pacientes submetidos à radioterapia para o tratamento de câncer de cabeça e pescoço. Nesta condição, o osso maxilar ou mandibular fica enfraquecido em razão de uma alta dose de radiação, fazendo com que haja perda de integridade da pele e mucosa, expondo o osso e persistindo sem cicatrização por no mínimo três meses. Alguns dos fatores que podem desencadear a osteorradionecrose são extrações dentárias, doença periodontal, cáries, abscessos e a alta dose de radiação empregada. Os sintomas normalmente apresentados incluem dor, odor, trismo, disestesia e fístula. Com relação ao tratamento, a abordagem conservadora é indicada nos casos iniciais e de pequenas lesões. Já as lesões extensas e de longa data necessitam de um manejo cirúrgico como, por exemplo, o debridamento, a ressecção e a hemimandibulectomia. Tratando-se de reconstrução mandibular, os retalhos preconizados para a cirurgia são o de fíbula, crista ilíaca, escápula e radial do antebraço. Estes retalhos apresentam características eficazes para a devolução de função e estética ao paciente. Este consiste em uma revisão dos artigos sobre o tema, buscados na base Pubmed e Google Acadêmico com o objetivo de detalhar acerca da osteorradionecrose e enfatizar o seu tratamento cirúrgico.
O EFEITO DO PREPARO CAVITÁRIO NA ADESIVIDADE E RETENÇÃO DE RESTAURAÇÕES PARCIAIS INDIRETAS
Authors: Soares João Gabriel Wilckson Ventura , Fernandes Leandro J.
Published: November 2024

As restaurações indiretas são utilizadas em preparos cavitários amplos devido à presença de cárie, traumas ou desgastes. A adesividade é um dos pilares da odontologia restauradora contemporânea. Enquanto nos anos anteriores o desenho da cavidade era ditado pelas propriedades do material e pela necessidade de macroretenção, o objetivo atual da restauração é o mínimo de invasividade baseado na adesão. O preparo correto é fundamental para obter uma restauração duradoura. Os preparos tradicionais contavam com maior desgaste de estrutura dental sadia, porém, com os avanços na adesividade, a necessidade de métodos que promovam a retenção mecânica foi reduzida. Atualmente, a introdução de técnicas de preparo que visem diminuir os desgastes de tecido saudável são preconizadas para garantir uma longevidade maior ao elemento, visto que os preparos os enfraquecem. Através de uma revisão de literatura foram selecionados diversos artigos através do banco de dados PubMed, SciElo e Google Acadêmico, objetivando conhecer o efeito do preparo cavitário na correlação da adesividade versus a retenção mecânica em restaurações parciais indiretas. O selamento imediato da dentina irá favorecer a adesão do material restaurador à estrutura dentária. A geometria do preparo não influencia significativamente na retenção das restaurações parciais indiretas, no entanto, a presença de ângulos arredondados e superfícies lisas são fundamentais para não haver estresse entre o material e o substrato, favorecendo o sucesso clínico da restauração.
MANTENEDORES ESTÉTICO-FUNCIONAIS PARA PERDA PRECOCE DE DENTES DECÍDUOS
Authors: Paquy Barbara da Silva , Gonçalves Sandro S.
Published: November 2024

A perda prematura dos dentes decíduos ainda é bastante comum, sendo geralmente causada por cáries ou traumas. Com o intuito de reduzir os impactos dessa perda, os mantenedores de espaço estético-funcionais surgem como uma alternativa valiosa. Eles não apenas restauram um sorriso agradável, mas também desempenham um papel preventivo importante contra disfunções funcionais, tais como deglutição atípica, interposição lingual e distúrbios fonoarticulatórios. Neste contexto, através de uma revisão de literatura, o presente trabalho tem como objetivo analisar os tipos de mantenedores estético-funcionais, que possibilitam a reabilitação protética do espaço deixado pela perda precoce de dentes decíduos. Considerando a importância da dentição decídua, torna-se inegável considerar a reabilitação através de mantenedores estéticos-funcionais para garantir o bem-estar da criança, promovendo um desenvolvimento bucal saudável e minimizando as possíveis complicações decorrentes da perda prematura dos dentes decíduos.
PENGARUH TEKNIK ANAGRAM TERHADAP PENGUASAAN KOSAKATA BAHASA JERMAN SISWA SMA PGRI 1 AMBON
Authors: Anakotta Sri Kartini , Serpara Henderika , Lestuny Carolina
Published: November 2024

Studi ini bertujuan untuk menentukan apakah teknik anagram mempengaruhi penguasaan kosakata Bahasa Jerman siswa SMA PGRI 1 Ambon. Metode eksperimen kuantitatif digunakan dalam penelitian ini. Penelitian ini melibatkan 20 siswa di kelas XI IPS SMA PGRI 1 Ambon, dan berlangsung dari tanggal 13 Januari hingga 13 Februari. Hasil analisis dilakukan dengan program Spss 23, instrumen penelitian yaitu menggunakan tes tertulis berupa Lückentest. Hasilnya menunjukkan bahwa menggunakan metode anagram memiliki efek positif. pada penguasaan kosakata bahasa Jerman siswa SMA PGRI 1 Ambon. Nilai t-hitung lebih besar dari nilai t-tabel, yaitu 14,565 lebih besar dari 1,729. Hasil tersebut menunjukan bahwa adanya peningkatan penguasan kosakata Bahasa Jerman berdasarkan nilai pre-test sebelumnya yaitu dengan rata-rata nilai 47,25 mengalami peningkatan menjadi 82,25. Selanjutnya hasil kuisioner juga menunjukan bahwa 100% siswa setuju dengan penggunaan teknik anagram dalam pembelajaran kosakata Bahasa Jerman.
KETIMPANGAN GENDER DALAM NOVEL CANTIK ITU LUKA KARYA EKA KURNIAWAN MELALUI PERSPEKTIF FEMINISME
Authors: Wenno Eldaa Crystle , Serpara Henderika
Published: November 2024

A novel is a literary work created by an author in the form of a long prose essay and contains a series of stories of a person's life that emphasizes his character and behaviour. The study aimed to describe the structural and existential elements of gender inequality in Eka Kurniawan's novel Cantik itu Luka. The study used two theories: structure theory and literary criticism of feminism that focuses on women as readers. Intrinsic elements of the novel will be examined using structural theories while feminist literary critique theories are used to examine gender inequality in the novel. The method used in this research is the descriptive qualitative method. The results of this study showed that (1) the structure in the novel Cantik itu Luka in the form of themes, plots, characters and strengthening, background, point of view, and mandate, (2) gender inequality that arises is in the form of gender inequality towards women through the perspective of feminism that leads to subordination that subordinates women, vulnerable to violence, negative stigma against women, and marginalization of women. This study suggest that a male writer must really understand women’s behaviors before writing about them.
PEMERTAHANAN IDENTITAS BUDAYA MELALUI PENDIDIKAN: PERAN BAHASA INDONESIA DI SAMPING BAHASA ASING DI ERA GLOBALISASI
Authors: Habeahan Deviana Claudia , Nainggolan Katlin Febrina , Sitorus Dinda Oktaveresia , Febriana Ika
Published: November 2024

Dialek dapat menjadi cerminan sejarah dan kecerdasan sosial suatu masyarakat. Sebagai salah satu bahasa dengan jumlah penutur terbanyak di dunia, bahasa Indonesia menunjukkan kemewahan dan perbedaan kata yang meningkatkan ekspresi dan pemahaman. Dalam situasi ini, kata-kata awal dari bahasa Jerman adalah sudut pandang yang menarik untuk diselidiki. Intuitif antara Indonesia dan negara-negara berbahasa Jerman, baik melalui pertukaran, pengajaran atau budaya, telah membentuk dasar yang kuat untuk proses peminjaman kata ini. Pembahasan dimulai dengan menggali sejarah hubungan antara bahasa Indonesia dan bahasa Jerman, terutama pada masa kolonialisme Belanda di Indonesia. Peran penting tokoh-tokoh Indonesia yang belajar di Jerman dalam menyebarkan kata-kata serapan serta pemahaman budaya Jerman yang kemudian diadopsi dalam bahasa Indonesia akan menjadi fokus utama. Selain itu, pembahasan juga mencakup analisis pola serapan dan adaptasi kata-kata dari bahasa Jerman ke dalam bahasa Indonesia. Bagaimana kata-kata tersebut berubah bunyi, struktur, dan maknanya sesuai dengan tata bahasa dan konteks sosial budaya Indonesia akan menjadi sorotan penting.
Kata serapan dari bahasa Jerman berperan penting dalam memperkaya kosakata bahasa Indonesia, terutama dalam bidang-bidang yang memerlukan istilah teknis dan ilmiah. Penggunaan kata serapan ini juga mencerminkan dinamika globalisasi dan pertukaran pengetahuan antarbangsa. Dengan memahami asal-usul dan adaptasi kata serapan dari bahasa Jerman, kita dapat lebih menghargai keragaman linguistik dalam bahasa Indonesia.Peran dalam Pengayaan Kosakata Kata serapan dari bahasa Jerman berperan penting dalam memperkaya kosakata bahasa Indonesia, terutama dalam bidang-bidang yang memerlukan istilah teknis dan ilmiah. Penggunaan kata serapan ini juga mencerminkan dinamika globalisasi dan pertukaran pengetahuan antarbangsa. Dengan memahami asal-usul dan adaptasi kata serapan dari bahasa Jerman, kita dapat lebih menghargai keragaman linguistik dalam bahasa Indonesia.
Pore System Characterization of Carbonate Rocks: A Multiphysics Approach Through Acoustic and NMR Measurements
Authors:   SLB, Ma Juntao , Liang Lin ,   SLB, Yan Xi ,   SLB, Yan Gongrui ,   SLB, Van Steene Marie ,   SLB, Abdallah Wael ,   SLB, Ma Shouxiang Mark ,   Saudi Aramco
Published: November 2024

Pore system characterization and, thus, permeability estimation in carbonate rocks have always been challenging due to the complexity of the carbonate rocks. Both acoustic and nuclear magnetic resonance (NMR) measurements have been employed individually to characterize different aspects of pore structure. In this study, we combine acoustic and NMR measurements for an improved, quantitative pore structure characterization of carbonate rocks. We first calculate the volume fractions of crack pores (microcracks and microfractures with a low aspect ratio), reference pores (interparticle pores with a medium aspect ratio), and stiff pores (moldic and vuggy pores with an aspect ratio close to one) through the inversion of an effective medium rock physics (EMRP) model using acoustic compressional and shear measurements. We then add the microporosities and macroporosities inferred from NMR interpretation to determine the volume fractions of six pore groups (microcrack, micro reference, micro stiff, macrocrack, macro reference, macro stiff) by joint inversion. We finally calculate the semi-long axis (l), semi-short axis (s), and cross-section area index (l×s) for the six pore groups through the aspect ratios from acoustic measurement and pore surface area to volume ratio for micropores and macropores from NMR. The derived pore geometry parameters are used along with the total porosity to build an empirical model for permeability estimation based on calibration with core data. This integrated pore characterization method was implemented to work on log data. Applying the developed workflow to field data demonstrated promising results for carbonate pore system characterization. The total porosity is partitioned into six pore types with corresponding pore body size information of the long axis and short axis. Comparisons with interpretation based on borehole images and core analysis present consistent results. Subsequent permeability estimates based on derived pore geometry parameters improved the permeability evaluation compared to conventional methods, confirming that the integration of NMR and acoustic data enhances understanding of rock productivity. Through the integration of NMR and acoustic measurements, this novel workflow significantly improves carbonate pore characterization by defining groups of subpores, together with the pore body size information for each pore type. In addition, carbonate rock permeability estimation is improved by introducing a cross-sectional area index by integrating the pore surface area to volume ratio from the NMR measurement and the aspect ratio from sonic measurements. This new method leads to improved formation evaluation and reservoir characterization in carbonate reservoirs.
Integrated Petrophysical Evaluation of Reservoir Fluids Affected by Production Using Combination of NMR and Elemental Spectroscopy Log Data Combined With Core Experiment Analysis
Authors:   Aker BP ASA, Kotwicki Artur , Kozlowski Maciej ,   Halliburton, Birkeland Kristoffer ,   Aker BP ASA, Elfenbein Carsten ,   Aker BP ASA, Skorve Torstein ,   Aker BP ASA, Jambunathan Venkat ,   Halliburton, Engelman Bob ,   Halliburton, Gales Robert ,   Halliburton
Published: November 2024

Production in East Frigg Alpha and Beta structures started in 1988 and produced gas until production was shut down in 1997. The oil accumulation in these structures was considered non-economical at that time and was not produced. Technological advances in drilling horizontal wells have led to a renewed interest in economically producing oil from this field. The main uncertainty in the redevelopment of this field is related to the remigration of the oil column due to extensive gas production. An appraisal well was drilled on the East Frigg Alpha structure in 2022 with the objective of testing the remaining oil potential. An extensive logging program, including nuclear magnetic resonance (NMR), elemental spectroscopy, and fluid sampling, was planned in addition to quad-combo log data for fluid identification and quantification of remaining oil and gas volumes. Elemental spectroscopy data, along with the other log data, were used as input to probabilistic solvers to obtain the mineralogy and quantify the oil and gas volumes. Extensive coring was performed to provide basic log calibration and information about movable fluids. Saturation was determined from center core plugs sampled offshore. Twin plug sets were drilled using brine and mineral oil as cooling agents in order to better address invasion effects. Additional centrifuge experiments were performed on fresh core material to investigate movable fluids phases associated with selected reservoir sections. Intra-reservoir baffles combined with historic gas production have triggered significant hydrocarbon remigration. Two thin oil-bearing intervals were found at shallow depths, separated by a water-filled zone. Underlying intervals contained residual hydrocarbons and the original water leg. Formation sampling on wireline was operationally constrained to the shallow reservoir section, confirming movable oil. Fluid distribution in deeper sections relied purely on wireline NMR and spectroscopy, further supported by core analysis. Combined data evaluation suggests the complex distribution of movable oil, residual gas, and variability in oil quality. Integration of all available data provided internally consistent interpretations critical to understand fluid movement and to evaluate further commercial potential. The results prove the importance of advanced logging and proper planning of core experiments for time-critical decisions.
The Impact of Fractures on Producibility and Completions in a Heavy Oil Carbonate Reservoir
Authors:   Chevron U.S.A. Inc., Adole Sunday , Li Ting ,   Chevron U.S.A. Inc., Se Yegor ,   Chevron U.S.A. Inc., Wilkinson Peter ,   Chevron U.S.A. Inc., Ranson Andrew ,   Chevron U.S.A. Inc., Azobu Joshua ,   Chevron U.S.A. Inc., Turner Jim ,   Chevron U.S.A. Inc., Gumilar Bambang ,   Chevron U.S.A. Inc., Whittlesey Karen ,   Chevron U.S.A. Inc.
Published: November 2024

The Wafra Field is located in the Partitioned Zone (PZ) between Saudi Arabia and Kuwait. Designing the right completion strategy to minimize water cut has been challenging in the Maastrichtian reservoir. One of the biggest challenges relates to variable hydrocarbon mobility and understanding of production from fractures. Also, there is uncertainty around the initial mobile water saturations in pay zones. Many wells come online with a high initial water cut, while other wells show low initial water cut before a sharp increase in produced water volume within a few months. Previous studies identified fracture production in at least one well based on core observations and production logging. In this paper, we make an integrated analysis of oil production from apparent tight zones with irregular fractures. A rich suite of borehole measurements was acquired across the field. Mud logs, wireline triple combo logs, formation pressure and fluid samples, core data, image logs, NMR logs, geochemical logs, and production logs (PLT) were collected. Initial production (IP) rates and well tests were utilized to provide the ground truth for our log interpretation. In many wells, oil production does not come from interpreted pay zones (porosity > =15%, water saturation < 50%) but rather from apparently tight rocks. The wireline logs offered limited insight into how fluids entered the wellbores. Conventional cores revealed either vugs or fractures in the rock with an aperture of several centimeters filled with oil. A PLT in one of the wells shows a significant inflow of relatively light oil and no water from an impermeable rock matrix. Wireline logs were interpreted with a multimineral model to compute rock and fluid volumes. The capture spectroscopy data provided clay concentrations, which led to a more robust porosity and matrix permeability interpretation. Image log processing revealed fracture networks with a considerable aperture in zones with higher production. Interpretation results were validated by core, fluid samples, mud logs, and production data (PLT, well tests). Ongoing assessment of fracture-related production and improved understanding of the role vugular zones and matrix permeability contribute to fluid mobility is key to future Maastrichtian development. The significance of this work is that it presents a multidisciplinary approach, combining openhole and casedhole petrophysics, to optimize producibility and completions.
Fundamentals of Distributed Acoustic Sensing for Inflow Profiling
Authors:   Shell, Panhuis Peter In ‘t
Published: November 2024

When light travels through an optical fiber, the smallest vibration impinging on the fiber will cause small disturbances in the back-scattered light. This principle is the foundation for distributed acoustic sensing (DAS), a fiber-optic technology that can turn an ordinary telecom fiber into a sensitive distributed sensor capable of detecting both acoustic and thermal disturbances over distances of several kilometers. DAS offers a wide range of applications for continuous and real-time monitoring of all well operations along the entire length of the wellbore without a need for well interventions. In this paper, we will demonstrate some of the foundational principles, experimental data, and key data processing steps to illustrate how DAS may be used for in-well production or injection profiling. Laboratory experiments were conducted in a horizontal flow loop, with multiple fibers clamped on the outside, with accelerometers and pressure sensors mounted to provide a reference signal, and with a separate inflow line to simulate perpendicular inflow of different types of fluids into the main flowline. Different types of orifices were used on the inflow line to model different types of flow restrictions. By pumping fluids at different rates through the main flowline and the inflow line, while monitoring the acoustic signatures using DAS, flow-noise correlations could be derived (see attached figure). It showed that flow noise could be predicted based on a single parameter that encompasses the impact of both inflow rate (Q) and inflow geometry, where the latter is represented by the diameter of the orifice (D) and the number of orifices (N). The results from the flow-loop experiments were used to develop algorithms for quantitative single-phase flow allocation, which were implemented into software workflows and successfully applied to actual field data to monitor injection and production performance. The impact of different acquisition parameters and key processing steps will also be demonstrated, and how they may impact data quality. Finally, advanced signal processing steps were applied to filter and distinguish the key parameters of interest, to improve the signal-to-noise ratio of the data, and to reduce the potentially large volume of data produced by DAS to allow for more efficient and quick decision making. These algorithms were subsequently implemented into the first software designed for the visualization, processing, and interpretation of DAS data for production and injection monitoring and have since been used for the interpretation of data from more than 100 wells from producing assets across the world.
Advanced Well Integrity Assessment by Using the New Generation of Acoustic Analysis Tool, Multifrequency Electromagnetic Tool, and Pulsed-Neutron Log in Oxygen Activation Mode: Colombia Case History
Authors:   Halliburton, Reyes Johana , Mata Jose ,   Halliburton, Méndez Osmary ,   Halliburton, Guevara Zunerge ,   Halliburton, Falla Jorge ,   Hocol S.A, Muñoz Alberto ,   Hocol S.A, Trujillo Hernando ,   Hocol S.A
Published: November 2024

Well integrity logs are fundamental for the optimization of the production of wells and for mitigating risks of environmental disasters. The information obtained helps identify potential problems and design correct remediation plans when encountered. This paper presents an actual example from Colombia that demonstrates how the well integrity log data was used as input for the operator to decide future operations in a producing well that was presenting a leakage at surface. This leak could eventually lead to serious environmental issues. Two wells were analyzed to understand the issue; the first was an injector well that was suspected of having the leakage, and the second was a nearby producing well that was showing unexpected water production at surface, which was analyzed and determined that it was coming from the injector well. The injector well was completed with 9.625 in. surface casing, 7 in. production casing, and 3.5 in. tubing. The entire well was logged in a rigless scenario with the multifrequency electromagnetic tool to determine metal loss across all strings and complemented with temperature logs. Additional diagnostics were performed, opening the annulus space to stimulate the leak while running the acoustic noise tool upward. Stationary measurements were done to confirm areas where leaks were identified. In the subsequent run, a pulsed-neutron log in oxygen activation mode was logged with the annulus open to identify the water movement direction. After logging the injector well, the producer well was analyzed by using multifrequency electromagnetic and temperature logs for proactive corrosion monitoring and to better define completion integrity. The integration of these three different technologies clearly indicated the location of the leak in the production casing. More precisely, the vertical and radial position was determined using acoustic and multifrequency electromagnetic tools. This analysis increased the chance of success for a safer operation after a well intervention program.
Holistic Integrated Approach for Reliable Leak Detection Using Beamforming of Acoustic Waveform and Basic Cased Hole Logging
Authors:   Halliburton, Kozlowski Maciej , Howard Rodney ,   Halliburton, Vican Kresimir ,   Halliburton, Lee Chung Yee ,   Halliburton, Garcia Dominguez Ana Maria ,   Enagas Transporte SAU, Gonzalez Cansado Borja ,   Enagas Transporte SAU
Published: November 2024

Well integrity is the obvious condition for safe and reliable well operations; therefore, reliable logging diagnosis and description of present leaks are necessary to plan and conduct effective and safe remediation. The case study well is a subterranean gas storage reservoir located on land. During a recent workover, the upper completion was removed, and as a best practice, a multifinger caliper survey was performed to check the status and integrity of the casing. No major problems with casing integrity were identified. The operator subsequently installed a new upper completion, and a successful pressure test was conducted confirming tubing integrity. However, a significant pressure drop was observed during testing annulus A between the tubing and the casing. Since no potential leak point could be ascertained from the multifinger caliper logging, the customer confirmed a requirement to perform further diagnosis with casedhole logging in the tubing to detect the leak. The proposed methodology included the acquisition and analysis of basic production logging sensor analysis in both static and dynamic conditions, along with spectral noise leak detection tool logging in continuous and stationary modes. The results of the subsequent logging acquisition program were consistent and pointed out a few areas of concern where the source of the leak could exist. The key element of investigation was the beamforming analysis of the acoustic waveform. Beamforming yields an estimate of the radial distance of the noise source of the leak from the tool. The beamforming analysis combined with corroborating data from high-resolution temperature (PRT), multifinger caliper (MIT), casing collar locator (CCL) pinpointed the leak source at a collar connection, thus distinguishing it from tubing to casing or formation noise as the source of the leak. This holistic approach required analysis of all available logging data – starting from basic casedhole logging sensors and advanced techniques for radial noise location. Especially beamforming technology allows for the identification of radial distance as well as the drawing of the flow map at the leak point.
Magneto-Electric Antenna and Its Application in Geosteering Tool Design
Authors:   Geoprance, LLC, Li Shanjun , Han Weishan ,   Geoprance, LLC
Published: November 2024

Using coil antennae as transmitter and receiver to develop a geosteering tool, one has to increase the spacing between the transmitter and receiver to detect formation boundaries far away from a well trajectory. This causes the dimension of some tools to go up to 100 ft. We propose a magneto-electric antenna for the development of geosteering tools to overcome the problem of tool lengthening. We introduced a magneto-electric antenna, which has both functions of coil antenna and electric antenna at the same time. When a conductive wire is bent into a semicircle arc, it can be regarded as a combination of two imagined antennae. One is a coil antenna formed by the semicircle arc and an imagined straight conductive wire connecting between the two ends of the arc. The other is an electrode antenna formed by the imagined straight wire. The semicircle arc antenna can thus be used as a coil antenna and as an electrode antenna; therefore, we named it the ME antenna. We propose a prototype tool that includes a coil antenna as a transmitter and an ME antenna as a receiver, and experimentally verify the definition of the ME antenna and demonstrate that the induced voltage on the ME antenna can be measured, and use numerical simulations to investigate the characteristics of ME antenna. The experiment results prove the correctness of the definition of the electromagnetic antenna and also prove that the induced voltage on the ME antenna can be measured. The simulated results show that: 1. The smaller the spacing between the transmitter and the receiver, the stronger the signal reflected by the boundary will be received by the ME antenna. 2. The signal strength received by the ME antenna is far stronger than that received by a coil antenna used by the existing commercial tools. 3. The signal received by the ME antenna is very sensitive to the boundary position. 4. The average of the signal measured by the ME antenna equals that measured by the imagined coil antenna while the tool was rotated, proving that the ME antenna can be used as a coil antenna. 5. The difference between the measured signal and the average of the signal equals that measured by the imagined electric antenna, proving that the ME antenna can be used as an electrode antenna. When a conductive wire is bent into a semicircle arc, it can be regarded as a combination of two imagined antennae. One is a coil antenna formed by the semicircle arc and an imagined straight conductive wire connecting between the two ends of the arc. The other is an electrode antenna formed by the imagined straight wire. The semicircle arc antenna can thus be used as a coil antenna and an electrode antenna at the same time; therefore, we named it the ME antenna. A prototype tool including one coil antenna as the transmitter and one ME antenna as the receiver was designed to study the characteristics of the ME antenna and test its feasibility.
Libri, storie, persone e parole fra Venezia e la Grecia
Miscellanea di scritti in memoria di Mario Vitti
Authors: Liosatou Eugenia , Scalora Francesco
Published: November 2024

Passing through the Heptanese and on the route to Constantinople, dominating Candia, Cyprus and the other outposts in the Levant, the Republic of Venice left its mark on the modern Greek world for many centuries. In the shadow of Saint Mark’s banner, relations between the two worlds, exchanges and the dense network of contacts that contributed to the development of knowledge were natural and obvious. Stories of encounters, animated by events, people, books and words that have left deep traces on the path of history are partly retraced and recounted in this volume dedicated to the memory of the illustrious Hellenist Mario Vitti (1926-2023).
Grammatiche greche a stampa da Venezia alla Grecia: XVII-XVIII secolo
Authors: Dieli Marta
Published: November 2024

Venetian printing, which played a pivotal role in the rediscovery of Greek in Western Europe during the Renaissance, contributed also to the cultural revival of modern Greece. During the seventeenth and eighteenth centuries, Greek schools gradually developed, and the necessary books were published in Venice. This paper briefly outlines this phenomenon. The first printed Greek grammars by Byzantine humanists (late fifteenth to early sixteenth century) were reprinted in Venice for use by Greeks from the late seventeenth century onward. Additionally, during the 18th century new grammars were published, aiming to renew the tradition and more effectively promote Greek paideia.
Le kandàdhes dell’Eptaneso: un repertorio di canto ‘artistico’ e ‘popolare’
Authors: Sanfratello Giuseppe
Published: November 2024

This paper presents some results of the first systematic investigation on the multipart singing practices transmitted in the Ionian Islands, represented mainly by the urban genre of the kandadhes, the arekies of Zakynthos and the ariettes of Kefalonia. These vocal music repertoires of these islands, both secular (urban and rural) and sacred (in the Byzantine rite) ones, are characterised by the use of a homophonic chordal idiom. More prominence here is specifically given to the repertoire of kandadhes, accompanied by musical instruments and distinguished as ‘folk’ (laikès) and ‘artistic’ (èndechnes) ones.
Su alcuni riflessi della concezione bizantina del potere nella Vita di Pietro il Grande di Antonio Catiforo
Authors: Cerroni Enrico
Published: November 2024

The dense web of cultural, religious, and political relations linking Greek intellectuals and Tsarist Russia in the eighteenth century has been the subject of several recent studies. A distinct chapter of this story concerns the Greeks of Venice, many of whom were educated at the Greek College in Rome or the Flanginian School in Venice. Antonio Catiforo (1685–1763), author of a Vita di Pietro il Grande (1736) written in Italian and subsequently translated into Greek (as the Βίος του Πέτρου του Μεγάλου), belongs to this category. In the context of the longue durée of the Byzantine legacy in Eastern Europe, this contribution aims to illustrate the reaction of Catiforo to both the establishment of the Russian Empire by Peter the Great in 1721 and another significant aspect of the contemporary nature of centralised power in relation to the periphery, the representation of the rebel ataman Mazepa and the Ukrainian Cossacks at the time of the Battle of Poltava (1709).
El Greco e Nikos Kazantzakis: due cretesi erranti
Authors: Tentorio Gilda
Published: November 2024

The painter Domìnikos Theotokòpoulos (1541‑1614) is a case of cultural osmosis, between the Byzantine tradition and the Western art (Crete, Venice, Spain). The writer Nikos Kazantzakis (1883‑1957) had a special link with his Cretan compatriot. The different references in his literary works (especially: Report to Greco) highlight his complex approach to the restless spirit of the ‘Beloved Ancestor’, who becomes the companion of his life, a personal myth, a hero who struggles for the quest of ascent.
Introduzione
Authors: Casonato Simona
Published: November 2024

In occasione del 150esimo anniversario della nascita di Guglielmo Marconi (1874-1937), inventore, imprenditore e scienziato, questo volume propone di avviare una riflessione sulla sua eredità culturale, a partire dalla storia e dalle collezioni del Museo Nazionale Scienza e Tecnologia Leonardo da Vinci di Milano. La biografia di Guglielmo Marconi e la storia del suo contributo allo sviluppo delle telecomunicazioni senza fili, o wireless, sono stati ripercorsi in dettaglio da innumerevoli analisi e racconti, in libri, riviste, programmi televisivi, documentari e mostre.
Detector magnetico in scatola di sigari. Il mito ‘fai da te’
Authors: Spada Roberta
Published: November 2024

L’oggetto analizzato in questo contributo è una piccola scatola di sigari di legno di circa 25 centimetri di larghezza per 16, alta qualche centimetro, con i bordi colorati di rosso e nero e il fondo sostituito da una tavoletta di legno che sborda rispetto alla scatola. Notiamo che è una scatola di sigari per via delle molte iscrizioni sul legno, dei resti delle etichette del monopolio e del marchio Conte di Cavour. Ma contiene anche due magneti a ferro di cavallo, è fissata a una tavoletta di legno che ne sostituisce il fondo e contiene una bobina di fili di rame attraverso cui passa una trecciola di fil di ferro e seta.
Questo oggetto si presenta come una riproduzione del prototipo del detector magnetico di Guglielmo Marconi, uno strumento per ricevere segnali telegrafici a distanza (precedente alla valvola termoionica) che utilizzava il principio dell’isteresi magnetica e la legge di Faraday-Neumann per rivelare onde elettromagnetiche. Era considerato molto più affidabile del coherer, una tecnologia precedente ritenuta instabile e soggetta a scariche atmosferiche, che quindi impediva una ricezione continua del segnale.
I jigger. Gli assistenti di Marconi nella sperimentazione sul campo (1897-1901)
Authors: Guagnini Anna
Published: November 2024

Nel 1900 Marconi ottenne il brevetto 7777, di fondamentale importanza per lo sviluppo della telegrafia senza fili, sia sul piano commerciale che tecnologico. Le innovazioni introdotte da quel brevetto costituirono un importante passo avanti nel tentativo di raggiungere l’obbiettivo della trasmissione sintonica, e nello stesso tempo consentirono di aumentare considerevolmente le distanze di comunicazione. Il dispositivo al centro di questa innovazione era il jigger, un trasformatore di frequenza che sia nella versione di prototipo, sia in quella di prodotto commerciale, figura spesso tra gli oggetti iconici nelle esposizioni marconiane.
Come Marconi influenzò la politica telegrafica italiana
Le Conferenze di Berlino del 1903 e 1906
Authors: Balbi Gabriele
Published: November 2024

La telegrafia senza fili nacque alla fine dell’Ottocento e, per molti aspetti, fu subito concepita come un mezzo di comunicazione internazionale. Da un punto di vista politico, le onde telegrafiche non potevano essere limitate ai confini nazionali e quindi le regole internazionali furono stabilite molto presto, tanto che, spesso, la legislazione internazionale ha anticipato quella nazionale. Inoltre, il wireless era visto dai governi come un’arma di comunicazione internazionale e il suo controllo divenne cruciale per Stati come il Regno Unito, la Germania, la Francia e più tardi gli Stati Uniti.
Utilization of Sengon Wood Sawdust as Bio-Pellet Feedstock: Characteristics, Potential, and Feasibility for Renewable Energy
Authors: Setyawan Eko Yohanes , Paepenan Semuel Poumer
Published: November 2024

The pellet-making process involves stages of drying, compaction, cooling, and size separation. Considering that Indonesia has great potential for biomass supply, this research aims to identify the characteristics of bio-pellets produced from sengon wood sawdust based on the pellet standard SNI8675:2018. The results showed that the highest calorific value at the Dry Basis (DB) condition was 4703 Kcal/kg, meeting national and international standards. The moisture content in the As Received (AR) condition was recorded at 10.36%, while the lowest ash content was 1.72%. The highest combustion rate was found in sample 3, with a value of 0.174 gr/min, indicating good combustion performance. The utilization of sengon wood sawdust as bio-pellets can be an efficient and environmentally friendly renewable energy solution, and has the potential to be further developed to support diversification and national energy security.