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Geostatistical seismic inversion and 3D modelling of metric flow units,porosity and permeability in Brazilian presalt reservoir

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Petroleum Science 2024年第3期21卷 1699-1718页

作者： Rodrigo Penna wagner Moreira Lupinacci Exploratory Interpretation and Reservoir Characterization Group (GIECAR) Department of Geology and Geophysics Universidade Federal Fluminense Petrobras

Flow units(FU) rock typing is a common technique for characterizing reservoir flow behavior, producing reliable porosity and permeability estimation even in complex geological settings. However, the lateral extrapolation of FU away from the well into the whole reservoir grid is commonly a difficult task and using the seismic data as constraints is rarely a subject of study. This paper proposes a workflow to generate numerous possible 3D volumes of flow units, porosity and permeability below the seismic resolution limit, respecting the available seismic data at larger scales. The methodology is used in the Mero Field, a Brazilian presalt carbonate reservoir located in the Santos Basin, who presents a complex and heterogenic geological setting with different sedimentological processes and diagenetic history. We generated metric flow units using the conventional core analysis and transposed to the well log data.Then, given a Markov chain Monte Carlo algorithm, the seismic data and the well log statistics, we simulated acoustic impedance, decametric flow units(DFU), metric flow units(MFU), porosity and permeability volumes in the metric scale. The aim is to estimate a minimum amount of MFU able to calculate realistic scenarios porosity and permeability scenarios, without losing the seismic lateral control. In other words, every porosity and permeability volume simulated produces a synthetic seismic that match the real seismic of the area, even in the metric scale. The achieved 3D results represent a high-resolution fluid flow reservoir modelling considering the lateral control of the seismic during the process and can be directly incorporated in the dynamic characterization workflow.

关键词： Flow units Geostatistical inversion Presalt reservoir 3D reservoir modelling Petrophysical modelling

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Mechanical upper bowel obstruction caused by a large trichobezoar in a young woman: A very unusual case report

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World Journal of Clinical Cases 2024年第4期12卷 777-781页

作者： Magdalena Scherrer Peter Kornprat Robert Sucher Johanna Muehlsteiner Doris wagner Department of Surgery Division for GeneralVisceral and Transplantation SurgeryMedical University of GrazGraz 8036Austria Department of Surgery Clinic RohrbachRohrbach 4150Austria

BACKGROUND Bezoars usually compile human fibers and debris.A special form of bezoar in case of psychologically altered individuals is the trichobezoar.It consists of voluntarily swallowed hair bulks and is normally removed via gastroscopy.Trichobezoars leading to ileus have rarely been reported.CASE SUMMARY A 24-year-old female patient presented to the emergency room with abdominal pain,nausea,and vomiting for 3 d.Her previous medical and psychiatric history was unremarkable.Laboratory analysis showed iron deficiency anemia,leukocytosis,and elevated liver enzymes.An abdominal CT scan revealed a dense structure in the patients’stomach which turned out to be a huge trichobezoar completely obstructing the pylorus.The trichobezoar had to be removed surgi-cally.During her postoperative course,a subcutaneous seroma formed.After a single puncture,the rest of the recovery process was unremarkable,and the patient recovered fully.CONCLUSION A mechanical bowel obstruction is a potentially life-threatening event for every patient.In our case a young female was suffering from severe symptoms of an obstruction which might have resulted in serious harm without successful surgical management.

关键词： Rapunzel syndrome Hair ingestion Gastroscopy Bezoar Case report

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Light correcting light with nonlinear optics

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Advanced Photonics 2024年第2期6卷 41-49页

作者： Sachleen Singh Bereneice Sephton wagner Tavares Buono Vincenzo D'Ambrosio Thomas Konrad Andrew Forbes University of the Witwatersrand School of PhysicsJohannesburgSouth Africa Universitàdegli studi di Napoli“FedericoⅡ” Dipartimento di Fisica“E.Pancini”NapoliItaly University of KwaZulu-Natal School of Chemistry and PhysicsDurbanSouth Africa

Structured light,where complex optical fields are tailored in all their degrees of freedom,has become highly topical of late,advanced by a sophisticated toolkit comprising both linear and nonlinear optics.Removing undesired structure from light is far less developed,leveraging mostly on inverting the distortion,e.g.,with adaptive optics or the inverse transmission matrix of a complex channel,both requiring that the distortion be fully characterized through appropriate measurement.We show that distortions in spatially structured light can be corrected through difference-frequency generation in a nonlinear crystal without any need for the distortion to be known.We demonstrate the versatility of our approach using a wide range of aberrations and structured light modes,including higher-order orbital angular momentum(OAM)beams,showing excellent recovery of the original undistorted field.To highlight the efficacy of this process,we deploy the system in a prepare-and-measure communications link with OAM,showing minimal cross talk even when the transmission channel is highly aberrated,and outline how the approach could be extended to alternative experimental modalities and nonlinear processes.Our demonstration of light-correcting light without the need for measurement opens an approach to measurement-free error correction for classical and quantum structured light,with direct applications in imaging,sensing,and communication.

关键词： phase conjugation aberration correction orbital angular momentum nonlinear optics

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Stochastic seismic inversion and Bayesian facies classification applied to porosity modeling and igneous rock identification

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Petroleum Science 2024年第2期21卷 918-935页

作者： Fábio Júnior Damasceno Fernandes Leonardo Teixeira Antonio Fernando Menezes Freire wagner Moreira Lupinacci Exploratory Interpretation and Reservoir Characterization Group(GIECAR) Department of Geology and GeophysicsFederal Fluminense UniversityNiter oiRJ24210-346Brazil Petrobras Rio de JaneiroRJ20231-030Brazil National Institute of Science and Technology of Petroleum Geophysics(INCT-GP/CNPQ) Niter oiRJ24210-346Brazil

We apply stochastic seismic inversion and Bayesian facies classification for porosity modeling and igneous rock identification in the presalt interval of the Santos Basin. This integration of seismic and well-derived information enhances reservoir characterization. Stochastic inversion and Bayesian classification are powerful tools because they permit addressing the uncertainties in the model. We used the ES-MDA algorithm to achieve the realizations equivalent to the percentiles P10, P50, and P90 of acoustic impedance, a novel method for acoustic inversion in presalt. The facies were divided into five: reservoir 1,reservoir 2, tight carbonates, clayey rocks, and igneous rocks. To deal with the overlaps in acoustic impedance values of facies, we included geological information using a priori probability, indicating that structural highs are reservoir-dominated. To illustrate our approach, we conducted porosity modeling using facies-related rock-physics models for rock-physics inversion in an area with a well drilled in a coquina bank and evaluated the thickness and extension of an igneous intrusion near the carbonate-salt interface. The modeled porosity and the classified seismic facies are in good agreement with the ones observed in the wells. Notably, the coquinas bank presents an improvement in the porosity towards the top. The a priori probability model was crucial for limiting the clayey rocks to the structural lows. In Well B, the hit rate of the igneous rock in the three scenarios is higher than 60%, showing an excellent thickness-prediction capability.

关键词： Stochastic inversion Bayesian classification Porosity modeling Carbonate reservoirs Igneous rocks

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肾肿物的动脉自旋标记MR成像:与组织病理结果的对照研究

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国际医学放射学杂志 2013年第1期 75-75页

作者： R.S.Lanzman P.M.Robson M.R.Sun A.D.Patel K.Mentore a.a.wagner 霍晓婷 Department of Radiology Beth Israel Deaconess Medical CenterBostonMass

目的以组织病理学结果为参照,评价肾脏实性肿物的动脉自旋(ASL)MRI灌注特征与价值。材料与方法这项前瞻性研究符合HIPAA原则,获得单位伦理委员会的批准。所有病人均于检查前签署了知情同意书。42例怀疑肾肿物的病人在进行常规1.5T临床MR... 详细信息

目的以组织病理学结果为参照,评价肾脏实性肿物的动脉自旋(ASL)MRI灌注特征与价值。材料与方法这项前瞻性研究符合HIPAA原则,获得单位伦理委员会的批准。所有病人均于检查前签署了知情同意书。42例怀疑肾肿物的病人在进行常规1.5T临床MRI检查前,进行了ASL检查。1名放射医师在不知最终病理结果的情况下,通过对兴趣区的分析,计算肿瘤灌注的平均值和峰值水平。通过方差分析检验灌注值与病理学结果的相关性。采用线性模型评价肾透明细胞癌的肿瘤体积与灌注值之间的相关性。P<0.05为差异具有统计学意义。结果 34例病人[男28例,女6例;(60.4±11.7)岁]获得组织病理学结果。乳头型肾细胞癌的平均灌注值[(27.0±15.1)mL/(min.100g)]低于透明细胞型[(171.6±61.2)mL/(min.100g),P=0.001]、嫌色细胞型[(152.9±80.7)mL/(min.100g),P=0.04]、未分类型肾细胞癌[(208.0±41.1)mL/(min.100g),P=0.001]和肾嗜酸细胞瘤[(373.9±99.2)mL/(min.100g),P<0.001]。肾嗜酸细胞瘤的灌注平均值和峰值水平[分别为(373.9±99.2)mL/(min.100g)和(512.3±146.0)mL/(min.100g)]高于乳头型[(27.0±15.1)mL/(min.100g)和(78.2±39.7)mL/(min.100g),两者P<0.001],嫌色细胞型[分别为(152.9±80.7)mL/(min.100g),P<0.001和(260.9±61.9)mL/(min.100g),P=0.02]和未分类型肾细胞癌[分别为(208.0±41.1)mL/(min.100g),P=0.01和(273.3±83.4)mL/(min.100g),P=0.03]。肾嗜酸细胞瘤的平均肿瘤灌注值高于透明细胞癌(P<0.001)。结论动脉自旋标记MR成像可在灌注水平上区分和诊断不同病理类型的肾脏肿物。肾嗜酸细胞瘤的灌注水平高于肾细胞癌,乳头型肾细胞癌的灌注水平低于其他亚型的肾细胞癌。

关键词：肾细胞癌灌注值肾嗜酸细胞瘤病理结果肿物自旋标记动脉 MR

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肾功能损害肾脏肿瘤病人的动脉自旋标记MRI特性:初步经验

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国际医学放射学杂志 2012年第2期 204-204页

作者： I.Pedrosa K.Rafatzand P.Robson a.a.wagner M.B.Atkins N.M.Rofsky 李华兵 Department of Radiology Beth Israel Deaconess Medical Center and Harvard Medical School330 Brookline AveBostonMA02215USA

目的回顾性评价动脉自旋标记(ASL)MRI对肾功能损害病人的肾脏肿瘤血管评估的可行性。方法 2007年5月—2008年11月,对67例中的11例因中度至重度慢性或急性肾功能衰竭的连续病人行未增强ASL-MRI检查,以评

关键词： MRI 肾肿瘤灌注肾功能不全肾源性系统性纤维化

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Determination of critical state line(CSL)for silty-sandy iron ore tailings subjected to low-high confining pressures

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第5期16卷 1684-1695页

作者： Nilo Cesar Consoli João Vítor de Azambuja Carvalho Alexia Cindy wagner Hugo Carlos Scheuermann Filho Inácio Carvalho Pedro Pazzoto Cacciari João Paulo de Sousa Silva Civil Engineering Universidade Federal do Rio Grande do SulPorto AlegreRS90035-190Brazil Exploration and Mineral Projects-Mineral Development Centre VALE S.A.Santa LuziaMG33040-900Brazil Department of Civil Geological and Mining EngineeringPolytechnique MontrealQuebecH3C 3A7Canada

The disposal of filtered tailings in high dry stacks can induce particle breakage,changing the material's behaviour during the structure's lifetime.The grading changes influence material properties at the critical state,and this is not mature for intermediate artificial soils(tailings)in a broad range of confining pressures.In this paper,it aims to describe the behaviour of iron ore tailings in a spectrum of confining pressures broader than the reported in previous studies.A series of consolidated drained(CD)triaxial tests was carried out with confining pressures ranging from 0.075 MPa to 120 MPa.These results show that the amount of breakage plays an essential role in the response of iron ore tailings.The existence of curved critical state line(CSL)in both specific volume(ν)-logarithm of mean effective stress(p′)and deviatoric stress(q)-mean effective stress(p′)planes,and different responses in the deviatoric stress-axial strain-volumetric strain curves were verified.An inverse S-shaped equation was proposed to represent the silty-sandy tailings'behaviour up to high pressures onν-lnp′plane.The proposed equation provides a basis for enhancing constitutive models and considers the evolution of the grading up to severe loading conditions.The adjustment considered three regions with different responses associated with particle breakage at different pressure levels.

关键词： Tailings Iron ore tailings dry stacking Silty-sandy material Critical state soil mechanics High confining pressures Particle breakage

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谷歌的AI人物图像生成功能陷入困境

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商业周刊（中文版） 2024年第5期 56-58页

作者： Kurt wagner Alex Barinka 孟洁冰(译) 不详

对于谷歌雄心勃勃的人工智能发展战略来说,2月原本是个铸就辉煌的月份。该公司将其聊天机器人重新命名为Gemini,并发布了两项重要产品升级,以便在利益攸关的人工智能竞赛中更好地与各方对手竞争。在此之际,谷歌还开始允许Gemini的用户... 详细信息

对于谷歌雄心勃勃的人工智能发展战略来说,2月原本是个铸就辉煌的月份。该公司将其聊天机器人重新命名为Gemini,并发布了两项重要产品升级,以便在利益攸关的人工智能竞赛中更好地与各方对手竞争。在此之际,谷歌还开始允许Gemini的用户生成逼真的人物图像。

关键词：人工智能聊天机器人谷歌图像生成产品升级 Gemini AI 重新命名

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Evidence-Based Complementary and Alternative Medicine Effects of Capybara Oil on Cardiac Remodeling of C57bl/6 Mice

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Journal of Biosciences and Medicines 2024年第5期12卷 213-232页

作者： Rafael M. Almeida wagner D. Giannetti Guilherme R. Silveira Carolina R. Castilho Renata V. Lisboa Bianca T. Ciambarella Rodrigo N. Ferreira Jorge José de Carvalho Laboratory of Ultrastructure and Tissue Biology Institute of Biology State University of Rio de Janeiro Rio de Janeiro Brazil Higher Education Center of Valenç a Dom Andr&#233 Arcoverde Educational Foundation Valen&#231a Brazil

Cardiovascular diseases are the main cause of morbidity and mortality in the world, and obesity and the metabolic syndrome are risk factors for its development. One of the therapies to reduce cardiovascular risk is the use of polyunsaturated fatty acids. In Brazil, a source of such acid is the oil extracted from the fat of the capybara. The objective of this work is to study the effects of the capybara oil on lipid and glucose metabolism, as well as its effects on the adipose tissue and cardiac remodeling. We assessed the effects of capybara oil treatment on body mass, lipid and carbohydrate metabolism, systolic blood pressure, adipose tissue and cardiac remodeling, and performed an ultrastructural evaluation of the myocardium in C57Bl/6 mice treated with high-fat diet. Treatment with capybara oil reduced total cholesterol and triglyceride levels, systolic blood pressure, visceral and subcutaneous adipose tissue, and adipocyte diameter. In addition, cardiac remodeling was attenuated, preserving cardiomyocytes, increasing vascularization, reducing cardiomyocyte hypertrophy and the extracellular matrix, and preserving the morphological integrity of mitochondria. Capybara oil has several beneficial effects on the cardiovascular and metabolic system, and further studies are needed to better understand its role in the prevention or treatment of cardiovascular diseases.

关键词： Capybara Oil Cardiac Remodeling Polyunsaturated Fatty Acids Obesity Metabolic Syndrome

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Nonlinear optics with structured light

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Opto-Electronic Advances 2022年第6期5卷 1-19页

作者： wagner Tavares Buono Andrew Forbes School of Physics University of the WitwatersrandPrivate Bag 3Johannesburg 2050South Africa.

The interest in tailoring light in all its degrees of freedom is steadily gaining traction,driven by the tremendous developments in the toolkit for the creation,control and detection of what is now called structured light.Because the complexity of these optical fields is generally understood in terms of interference,the tools have historically been linear optical elements that create the desired superpositions.For this reason,despite the long and impressive history of nonlinear optics,only recently has the spatial structure of light in nonlinear processes come to the fore.In this review we provide a concise theoretical framework for understanding nonlinear optics in the context of structured light,offering an overview and perspective on the progress made,and the challenges that remain.

关键词： wave mixing parametric conversion high harmonic generation structured light photonic crystals holography nonlinear optics second harmonic generation metasurfaces

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