bluuebunny/crossref_metadata_2025_split huggingface dataset:
Fast Economic Analysis and Optimization of Fracture-Stimulated Wells in Condensate Reservoirs
Authors: Filippov Andrey , Jia Xinli , McNealy Timothy , Khoriakov Vitaly 
Published: April 2016

Abstract
This paper presents a method for the fast evaluation of fracture-stimulated condensate reservoir economics. For the calculation of production decline in such reservoirs, an efficient numerical model with a three-phase transient analysis of pressure distribution was built and validated using the predictions from reservoir solvers and field data. This model solves for gas-, oil-, and water-flow parameters, accounting for the gas-oil phase transition, and has been realized in a numerical code and compared with predictions from commercial software and available field data, such as production-decline curves.
The developed numerical model has been implemented in commercial software and used for the sensitivity analysis of reservoir productivity regarding changes of fracture size and spacing, as well as reservoir permeability in the fractured condensate reservoirs, with an account for multiphase reservoir flows and reservoir properties. A side-by-side comparison of predictions from two commercial reservoir simulators has shown that that this model accurately calculates transientpressure fields near the fractures and the productiondecline curve.
The objective of the economic analysis and fracture optimization stage is reduced to finding the target function minimum in an N-dimensional parametric space using various constrained minimization techniques, including a Quasi-Monte Carlo analysis and the Active Set Method.
An Enhanced Method to Correct Rate Data for Variations in Bottom-Hole Pressure
Authors: Chaudhary Nitinkumar L. , Lee W. John 
Published: April 2016

Abstract
The objective of the study summarized in this paper was to develop an accurate and robust method (deconvolution) to transform rate data from a well producing with variable bottom-hole pressure (BHP) into the rate data that would have resulted had the well been produced at constant bottom-hole pressure throughout its history. These ‘corrected’ rate data can then be analyzed with confidence to determine parameters in decline models or to use in more general rate-transient analysis. Current methods used in the industry to correct for the effects of variable BHP, such as pressure-normalized rates and material-balance time, lead to less accurate model-parameter determination and thus to less accurate forecasts of future production.
We propose a new methodology based on Inverse Problem Theory to accurately forecast performance of a reservoir exhibiting variable pressure and rate trends. We first apply a unique deconvolution algorithm to the observed rate and pressure data; this deconvolved rate response represents the true decline model response if the bottomhole pressure remained constant throughout the production history. We then use the deconvolved rate response to estimate decline model parameters (like Arps decline parameter "b", loss-ratio and derivative of loss ratio) using standard curve fitting techniques. We then convolve this rate decline model with the proposed future pressure decline to obtain an accurate forecast of reservoir performance.
We pose this deconvolution problem as a regularized and weighted least square problem; the novelty in our approach lies in the regularization and weighting strategy we propose. We have overcome the limitations due to the poor quality of production data (as compared to well test data) by proposing an unsupervised weighting scheme based on a local outlier factor. We validate our method with synthetic examples generated using numerical models of multi-stage hydraulically fractured wells in unconventional reservoirs. We then illustrate application of our method using field examples from four major shale plays. Our work demonstrates that this new methodology of integrating pressures into decline curve analysis is theoretically and practically more robust than the analysis of pressure normalized rate data currently used to solve the problem.
Trust, But Verify: Maximizing Bluefield Value by Challenging the Engineering Assumptions
Authors: Surovtsev Dmitry , Miklashevich Sergey , Komin Maxim , Meulengracht Chresten 
Published: April 2016

Abstract
The paper discusses a novel workflow and tools for stochastic optimization under uncertainty aimed at maximizing the value of exploration and early appraisal assets using a public example of an East Africa offshore gas discovery.
Following an initial discovery well, the prospect enters an appraisal phase with tangible uncertainties in resource base (a P10/P90 ratio of 3.1), well productivity (P10/P90 of 2.1), and cost estimates (30%/+50% tolerance). The choice of LNG train capacity and development concept changeover point has a profound effect on asset evaluation results used for attracting new project partners.
These uncertainties raise a number of critical questions: How can a facility engineer elaborate these key parameters given the three-fold uncertainty in resource base at this project stage? Will these choices change under a random walk in oil prices or given different attitudes towards risk by the management? Does maximization of project after-tax value and of production entitlement imply identical values of control parameters in these circumstances?
The challenges are resolved by sampling the solution space with 54,000 full-cycle evaluation trials run in just over 13.5 hours using a combined power of an exploration decision support tool with fit-for-purpose and fit-to-data risks, resource, and value assessment that honors all risks and uncertainties; a workflow management tool for decision optimization based on a multiple-realization approach powered by various uncertainty and optimization methods; and a proprietary link between these two applications.
The original operator's view on the facilities concept was found to reflect a P50 of reserves uncertainty and a P50 of worldwide LNG train capacity distribution. Optimizations were performed to address five progressively complicating problem formulations. The achieved outcomes match conclusions that could be derived with a reasoned train of thought in economy-of-scale context meaning our solution is applicable for modeling situations lacking simple analytical solutions.
Financial Impact of Price Volatility on the Oilfield Services Sector of the Petroleum Industry
Authors: Michael Andreas 
Published: April 2016

Abstract
Historically, oilfield services companies seemed to be financially more sensitive to crude oil price volatility compared to companies doing exploration and production. This was evident both in times of rising and falling price, imposing serious challenges to them. The year 2014 marked, after a 40 percent drop in the price of oil, the agreement for one of the largest acquisitions in the industry between two of the biggest international oilfield service providers; that of Baker Hughes, Inc. by Halliburton Co. The implications of these price fluctuations significantly influence this sector of the industry shaping the narrative around it.
This paper evaluates the extent to which crude oil price variations affect the service companies in the stock market compared to exploration and production (E&P) companies. Regression analysis is performed on two sample groups; one consisting of service companies and the other of E&Ps. Daily data from the beginning of 1986 until early 2015 is used for both stock and crude oil prices. When compared to the E&Ps group, the service companies group is more oil price sensitive throughout the whole period by a factor of almost six and a half. In particular, from 1986 to 2007 this factor is 6.3. For the post 2008 period, a reverse causality effect is observed for both groups with changes in the oil price, with the service companies group slightly less sensitive, yielding a factor of 0.9.
The factors responsible for the observed phenomena are evaluated, backed with data analysis. The higher economic limits of unconventional compared to conventional energy resources, make the service companies specializing in unconventional play development struggle as these are the first to become uneconomic in times of falling price. The downstream operations most E&Ps have unlike service providers, enables them to buffer losses in their upstream sectors when price drops and vice versa. Also, the decreasing dependence of the E&Ps on service companies as they grow bigger makes the latter less adroit to price variations than the former. Finally, the rise of the national oil companies in recent decades in terms of production and reserves control, has led to additional competition against service companies by international oil companies for providing specialized technical assistance.
Solutions to 5 Strategic Issues Plaguing Executives in 2015-2016: Solving the Right Problems With Portfolio Management
Authors: Howell John I , Warren Lillian 
Published: April 2016

Abstract
Since 2014 the energy industry has redefine the term rapidly changing business environment. Commodity prices have plunged, financing options shifted from abundant to scarce and corporations focus has moved from growth to survival. As these changes have evolved, the flaws in our traditional planning processes and tools have become evident. Executives have experienced unprecedented needs to update strategies and business plans on a weekly basis while most of our planning groups are designed to update on an annual basis. This paper will discuss three examples where companies have used portfolio management models to rapidly explore strategic scenarios in an effort to answer strategic issues. The examples illustrate how portfolio functions including optimization, uncertainty analysis and integrated financials have allowed some companies to efficiently plan in these volatile times. The examples illustrate solving strategic issues such as rapidly exploring strategic investment scenarios, assessing investment options at multiple commodity price points, balancing financial and operational metrics, balancing near and long term performance and rapidly developing capital allocation strategies.
ANALYZING THE STUDENTS'ABILITY IN WRITING OPINION ESSAY USING FLASH FICTION
Authors: Setyowati Lestari 
Published: April 2016

<p>The use of literature in language classroom has attracted language teachers to utilize it in the FL classroom. This paper is intended to decribe the students’ ability to write opinion essay by using flash fiction, Frank Stocton’s <em>The Lady or the Tiger.</em> The design used in the study was content analysis design in which the researcher collected the students’ composition after they were assigned to write opinion essay by using flash fiction. The subject of the study was 2013A batch of STKIP PGRI Pasuruan. The data were colected in 30 June 2015 and 7 July 2015. The result shows that students were able to make thesis statement that showed their opinion, but unable to develop the essay well, and state conclusion that reflect the essay. Moreover, two thirds of the students were not able to produce the essay in at least 250 words. The problems of the flash fiction used in the classroom and its limitation are discussed in the paper along with the suggestion for those who are interested to use literary work in FL classroom.</p><p> </p><p><strong>Key words:</strong> literary works, flash fiction, opinion essay.</p>
La croissance des nuisances routières : une source d'inégalités non reconnues
Authors: Viard Claudine 
Published: April 2016

La croissance constante de la circulation routière s'accompagne d'inégalités que la puissance publique se refuse à admettre et à corriger. Malgré des études réalisées par des organismes publics montrant que la pollution chronique de l'air tue, que la valeur des immeubles des riverains baisse, le choix de la route continue à prévaloir. Il génère mécaniquement une demande d'infrastructures accrue, toujours satisfaite, sans compensation des riverains, car le droit refuse de les reconnaître comme victimes et d'admettre concrètement qu'il y a un intérêt général à améliorer la qualité de l'air et à protéger la population contre le bruit. Pourtant des Etats européens montrent une alternative. Ils prennent des mesures effectives pour développer les modes de circulation douce dans les centres urbains et transférer au rail une part croissante du transport de marchandises longue distance. C'est notamment le cas de la Suisse.
L'audit commandé par le Gouvernement Raffarin à des ingénieurs des Ponts et Chaussées montre que le changement de cap n'est probablement pas pour demain.
Décentralisation constitutionnelle et environnement
Authors: Lambert Marie-Laure 
Published: April 2016

La décentralisation, renforcée par la loi du 28 mars 2003, marque déjà la gestion de l'eau, des déchets et des réserves naturelles, et pourrait faire progresser d'autres domaines du droit de l'environnement, par le biais d'expérimentations nationales ou locales.
Ainsi, pourrait se développer une gestion plus cohérente du patrimoine naturel, selon des indicateurs de qualité, des objectifs de « naturalité », dans le cadre de régions biogéographiques. De même la prévention de la pollution atmosphérique ou agricole, le développement des énergies renouvelables, la prise en compte localement du principe de précaution ou de protection (dans des dossiers comme la téléphonie mobile ou les OGM) pourraient être des domaines d'initiatives locales enrichissantes.
Mais inversement, la décentralisation est porteuse de risques : si le contrôle de l'Etat ou le contrôle citoyen s'affaiblit, la tentation de déroger aux règles protectrices (comme celles du littoral ou de la montagne) pourrait l'emporter, et la mise en concurrence de régions inégalement riches pourrait conduire à des situations très déséquilibrées et à une gestion non solidaire de l'environnement en France.
Checklist of British and Irish Hymenoptera - Braconidae
Authors: Broad Gavin , Shaw Mark , Godfray H. Charles 
Published: April 2016

The checklist of British and Irish Braconidae is revised, based in large part on the collections of the National Museums of Scotland, Edinburgh, and the Natural History Museum, London. Distribution records are provided at the country level together with extensive synonymy and bibliography.
Of the 1,338 species regarded as valid, presumed native and certainly identified, 83 are here recorded for the first time from the British Isles. One new synonym is established (Dyscritus suffolciensis Morley, 1933 = Syntretus splendidus (Marshall, 1887) syn. nov.)
La croissance économique est-elle encore possible ? Est-elle encore souhaitable ? Qu’en est-il de l’Europe ?
Authors: Matelly Sylvie 
Published: April 2016

La croissance est souvent perçue comme l’objectif ultime, la condition à de meilleures conditions de vie, à l’emploi et au développement. Pour autant, elle est souvent brisée par la crise. Les temps actuels nous en montre une illustration flagrante et elle apparaît plus incertaine que jamais. Elle est par ailleurs aussi facteurs de « nuisances » et d’effets pervers tels le réchauffement climatique ou diverses pollutions, les inégalités, la spéculation etc. Pourquoi alors semble-t-elle si importante ? Cet article revient sur ce concept somme toute très récent dont on n’appréhende le plus souvent que les atouts parce que finalement la croissance est source de toujours plus, comme une illusion que tout va bien. Elle permet en effet de donner un peu plus à certains sans priver d’autres mais elle permet aussi d’éviter un questionnement voire une remise en cause systémique quant à nos modes de vie, d’échange et de partage. Il est alors opportun de se demander si elle est encore possible ? Encore souhaitable ?
Subjectivations computationnelles à l’ erre numérique
Authors: Citton Yves 
Published: April 2016

Peut-on parler de subjectivités computationnelles dès lors que nous communiquons parfois avec des bots algorithmiques sans même le savoir ? L’article passe rapidement en revue neuf modalités d’articulations possibles entre subjectivation et computation : opacification, rigidification, exploitation, superposition, exclusion, extension-augmentation, interpénétration, altérité et, finalement, errement. Pourquoi ne pas apprendre à faire du computationnel – et de l’incomputable qu’il recèle nécessairement – une nouvelle forme d’altérité culturelle ? Cela implique toutefois de reconnaître un certain erratisme inhérent à l’expérience humaine de programmation. Bienvenue dans l’ erre numérique !
Esprit d’équipe
Authors: Guess Jeff , Citton Yves 
Published: April 2016

Un texte sur les sports de compétition – là où s’éprouvent les limites physiques du « soi-disant Homme » (selon la formule de Kittler) – et leur interdépendance croissante avec des algorithmes utilisés pour prendre des décisions stratégiques, améliorer les performances, alimenter les ligues Fantasy , écrire des commentaires des matchs et créer pour les fans des expériences symbiotiques avec les écrans géants vidéo placés dans les stades.
Un défi démocratique : la quête d’autorité et de reconnaissance des jeunes hommes des quartiers populaires
Authors: Bordet Joëlle 
Published: April 2016

Cet article a pour sujet le défi démocratique que représente la quête d’autorité des jeunes hommes des quartiers populaires urbains. Au delà des stéréotypes et du sentiment d’indignité vécu par les jeunes les plus « fixés » dans les quartiers, ces derniers sont au prise aujourd’hui avec une figure politico-médiatique essentialisée du « musulman ». L’identification à cette figure influence leur demande de reconnaissance et de légitimité mais aussi d’ordre et d’autorité, en particulier, dans les rapports hommes-femmes. Ce processus n’est pas nouveau mais il tend à se cristalliser dans une affirmation idéologique qui interroge et met en cause des processus démocratiques, en particulier d’égalité dans les rapports de genre. Cette dynamique concerne à la fois les jeunes hommes et les jeunes femmes. En référence à l’ouvrage Au péril de l’ordre de Sophie de Mijolla-Mellor, cet article propose une alternative démocratique pour répondre à la demande d’autorité et d’ordre des jeunes des quartiers populaires et transformer le risque de fermeture autoritaire crée par cet essentialisme du « musulman », analysé précédemment.
Le regard dans la cure psychanalytique. Interdiction ou répression ?
Authors: Roth Berta 
Published: April 2016

On ne conteste plus l’idée que c’est le récit du patient qui donne forme à ce qui est informe. Ce qui est moins acquis est que la Forme que prend parfois le récit montre l’informe qui cherche à dire. Nous faisons référence à ces Formes non interprétables comme peuvent l’être un son, une odeur, un geste, un bruit ou autre, quand ils surgissent dans la séance comme des bizarreries ou des actes « inopportuns ». De les interroger on constate que ces actes que l’on considère parfois comme des hystérisassions du discours, sont en réalité des « Signes », des appels pleins de sens face à une parole interdite.
Les cadres surchargés par leurs emails : déploiement de l’activité et expérience vécue
Authors: Créno Lisa , Cahour Béatrice 
Published: April 2016

L’article vise à comprendre les caractéristiques de l’activité de gestion des emails et les expériences vécues associées de cadres s’estimant surchargés par leurs emails. Une triangulation des méthodes a été mise en place pour parvenir à éclairer différents points de vue de l’activité. Des journées d’observation, des journaux de bord, des entretiens « resituants » et un questionnaire ont été menés auprès de deux panels de cadres surchargés volontaires. Cet article s’appuie sur la description détaillée de 4 cas de cadres particulièrement débordés par leurs emails, aux procédures de gestion et de régulation des emails différents. Les résultats décrivent les contextes socio-professionnels de ces cadres, le phénomène de gestion continue des emails leur permettant de tenter de faire face à l’explosion d’emails mais aussi les effets délétères sur leur santé et efficacité au travail. L’article souligne les spécificités des phases de lecture/classement/rédaction d’emails, coûteuses cognitivement et émotionnellement pour ces cadres surchargés. L’identification d’emails « problématiques » et les émotions négatives associées sont apparues comme l’une des originalités de l’étude, marquant à nouveau le manque de repères et de règles communes aux usages hétérogènes du média. Enfin, des recommandations permettent de discuter des perspectives à donner à la messagerie électronique.
Dok1 and Dok2 Proteins Regulate Cell Cycle in Hematopoietic Stem and Progenitor Cells
Authors: Coppin Emilie , De Grandis Maria , Pandolfi Pier Paolo , Arcangeli Marie-Laure , Aurrand-Lions Michel , Nunès Jacques A. 
Published: April 2016

Abstract
Dok1 and Dok2 proteins play a crucial role in myeloid cell proliferation as demonstrated by Dok1 and Dok2 gene inactivation, which induces a myeloproliferative disease in aging mice. In this study, we show that Dok1/Dok2 deficiency affects myeloproliferation even at a young age. An increase in the cellularity of multipotent progenitors is observed in young Dok1/Dok2-deficient mice. This is associated with an increase in the cells undergoing cell cycle, which is restricted to myeloid committed progenitors. Furthermore, cellular stress triggered by 5-fluorouracil (5-FU) treatment potentiates the effects of the loss of Dok proteins on multipotent progenitor cell cycle. In addition, Dok1/Dok2 deficiency induces resistance to 5-FU–induced hematopoietic stem cell exhaustion. Taken together, these results demonstrate that Dok1 and Dok2 proteins are involved in the control of hematopoietic stem cell cycle regulation.
Beliefs and attitudes of male and female adolescents and the risk of smoking behavior
Authors: Kasim K , Al-Zalabani A , Abd El-Moneim ES , Abd El-Moneim S 
Published: April 2016

Background:
Adolescent smoking relates to numerous risk factors, of which beliefs and attitudes toward smoking may play a role. The study aimed to investigate the association between beliefs and attitudes and the risk of adolescent smoking.

Materials and Methods:
In a school-based cross-sectional study, 3,400 students were recruited from 34 intermediate and secondary schools in Madinah City, Al Madinah Region, Saudi Arabia. Data about sociodemographics, smoking-related factors, and beliefs and attitudes toward smoking were collected using a valid and reliable self-administered questionnaire. Prevalence of smoking was estimated and the studied beliefs and attitudes were compared by smoking status and sex using appropriate statistical analyses including multivariate logistic regression.

Results:
Of the 3,322 respondents, 33.02% (38.9% males and 26.4% females) were current smokers. Beliefs and attitudes toward smoking significantly differed between smokers and nonsmokers in the studied male and female students. The adjusted risk of smoking was significantly increased among female adolescents who believed that male smokers were more attractive [odds ratio (OR) = 2.2; 95% confidence interval (CI) = 1.6-2.9] and among male smokers who believed that female smokers are more attractive (OR = 1.7; 95% CI = 1.2-2.2). The risk was also increased among all adolescents who believed that smoking lent comfort in social gatherings. Belief that smoking is harmful, however, was negatively associated with the risk of smoking, particularly among females (OR = 0.55; 95% CI = 0.35-0.91).

Conclusions:
The study revealed a considerable high prevalence of smoking among male and female adolescents. Addressing the beliefs and knowledge about smoking during childhood is crucial in any antismoking program.