bluuebunny/crossref_metadata_2025 huggingface dataset:
L'EMDR (désensibilisation et retraitement par les mouvements oculaires) comme traitement d'appoint de la dépression unipolaire : une étude contrôlée
Authors: Hofmann Arne , Hilgers Angelika , Lehnung Maria , Liebermann Peter , Ostacoli Luca , Schneider Wolfgang , Hase Michael
Published: October 2018

La dépression est un trouble mental grave qui constitue un défi pour les systèmes de santé mentale du monde entier. Environ 30 % des patients n'obtiennent pas de rémission complète après le traitement, et plus de 75 % des patients souffrent d'épisodes dépressifs récurrents. Si la psychothérapie et la médication améliorent les taux de rémission, les taux de réussite des traitements actuels sont limités. Dans cette étude exploratoire contrôlée non randomisée, 21 patients souffrant de dépression unipolaire primaire ont été traités avec une moyenne de 44,5 séances de thérapie cognitive comportementale (TCC), avec en moyenne 6,9 séances supplémentaires de désensibilisation et de retraitement par les mouvements oculaires (EMDR). Un groupe contrôle (n = 21) a été traité avec une moyenne de 47,1 séances de TCC sans séance EMDR supplémentaire. Le principal moyen de mesure des résultats a été le Questionnaire de Dépression de Beck (BDI-II). Les scores BDI-II des deux groupes étaient identiques avant traitement et les deux traitements ont produit une amélioration significative. Les patients traités avec les séances d'EMDR d'appoint (p = 0,029) ont cependant obtenu des améliorations plus importantes. Le nombre de rémissions post-traitement, indiqué par un niveau symptomatique inférieur à 12 sur l'échelle BDI-II, était aussi significativement plus élevé dans le groupe ayant bénéficié de séances d'EMDR d'appoint : ce groupe a présenté davantage de rémissions (n = 18) que le groupe de contrôle (n = 8 ; p < 0,001). Cet effet potentiel de l'EMDR chez les patients souffrant de dépression primaire doit faire l'objet d'études contrôlées randomisées plus larges.
Application de la thérapie EMDR au trouble de la personnalité borderline
Authors: Mosquera Dolores , Leeds Andrew M. , Gonzalez Anabel
Published: October 2018

Il y a aujourd'hui un intérêt croissant pour l'utilisation de la thérapie de désensibilisation et de retraitement par les mouvements oculaires (EMDR), au-delà du traitement de l'état de stress post-traumatique (ESPT) où son application est bien établie. Étant donné le fort consensus scientifique actuel autour de la responsabilité des vécus traumatiques du passé dans le développement d'un trouble de la personnalité borderline (TPB), l'EMDR semble en effet pouvoir apporter beaucoup au traitement des personnes qui en souffrent. Cependant, les traits spécifiques de ces patients font que l'application de la thérapie EMDR dans leur traitement s'avérer parfois difficile et nécessite plusieurs adaptations (mineures) des procédures standard de l'EMDR pour l'ESPT. Le présent article propose des principes et des stratégies permettant de préparer de façon sûre et efficace les patients TPB à la thérapie EMDR et d'accéder et de retraiter les origines traumatiques du TPB. Des exemples cliniques sont donnés tout au long de cet article.
Supervisión de casos: Depresión persistente
Authors: Shapiro Robin , Hofmann Arne , Grey Earl
Published: October 2018

Supervisión de casos es un nuevo apartado regular del Journal of EMDR Practice and Research. En este artículo, una terapeuta de desensibilización y reprocesamiento por movimientos oculares (EMDR) describe brevemente un caso complicado en el cual un hombre, “George”, fue derivado a tratamiento EMDR por una depresión que había comenzado hacía más de dos años. Después de haber procesado completamente con EMDR todos los recuerdos traumáticos que había descrito, George continúa gravemente deprimido y la terapeuta pregunta cómo puede proceder de manera eficaz con el tratamiento. Tres especialistas responden por escrito. La primera especialista, Robin Shapiro, describe una lista exhaustiva de posibles etiologías, que incluyen causas de apego, de trauma temprano, genéticas y otras causas biológicas, además del tratamiento de EMDR, de estados del ego o médico adecuado para cada una. El segundo experto, Arne Hofmann, analiza el tratamiento impartido y hace sugerencias de blancos alternativos para el tratamiento y sugiere que la terapeuta podría trabajar con la creencia “nada cambiará” y probar con el protocolo invertido de EMDR. El tercer experto, Earl Grey, recomienda que el terapeuta se centre en trabajar los traumas de “t” pequeña, aún si el paciente indica que apenas tiene perturbación y explica la manera de desarrollar e implementar una “secuencia reparadora de blancos de la vida”.
Caracterización de la carne de cuy (Cavia porcellus) para utilizarla en la elaboración de un embutido fermentado
Authors: Flores-Mancheno César Iván , Duarte Cira , Salgado-Tello Iván Patricio
Published: October 2018

La carne de cuy, por su alto valor nutritivo, es importante en la alimentación humana, y clave para la seguridad alimentaria; además, es utilizada para la elaboración de productos agroindustriales. Las personas que consumen esta carne son menos propensas a enfermedades. El objetivo de la investigación fue caracterizar la carne de cuy para su posible utilización en la elaboración de un embutido fermentado. Las líneas de cuyes evaluadas fueron la Criolla, la Andina y la Peruana mejorada. La carne se caracterizó utilizando análisis de varianza para las diferencias y comparación de medias, según Duncan (p<0.05), desde el punto de vista físico-químico, microbiológico y sensorial. El contenido de humedad no registró diferencias entre las tres líneas evaluadas (75,6 % en el Andino, 73,3 % en el Peruano mejorado y 72,7 % en el Criollo). El mayor contenido de proteína (19,1 %) se encontró en el Criollo, así como el menor contenido de grasa (7,6 %). En cuanto a las características microbiológicas y sensoriales de la carne, cumple con los requisitos de calidad establecidos por las normas respectivas. La calidad de la carne de cuy permite su utilización en la formulación de un producto cárnico.
KULLANIMLAR VE TATMİNLER KURAMI BAĞLAMINDA SPOR BASINI OKURU, OKUMA MOTİVASYONLARI VE TATMİNLERİ
Authors: Demir Yavuz
Published: October 2018

Günümüzde spor ve basın kavramları, günlük hayatın önemli birer parçasını oluşturmaktadır. Bu iki kavramının
bir araya gelmesiyle oluşan spor basını ise başlı başına bir kurum haline gelmiştir. Spor basınıyla birlikte, spor
basını okuyucusu da önem kazanmıştır. Spor basını okuyucusu sadece kendisine sunulan içerikleri alan pasif
izleyiciler olmaktan çıkıp, içerikleri yorumlayan, anlamlandıran ve bu çerçevede değerlendiren aktif katılımcılar
haline gelmiştir.
Bu çalışmayla, Kullanımlar ve Tatminler Kuramı çerçevesinde Konya’daki spor basını okurunun, okuma
motivasyonları ve tatminlerini belirlemeye çalışılmıştır. Spor basını okurunun ne gibi motivasyonlarla spor gazetesi
okuduğu, ne gibi ihtiyaçlarını giderdiği ve tatmine ulaştırdığı, okudukları spor gazetelerine duydukları güven
belirlenmeye çalışılmıştır.Söz konusu düşünceyle gerçekleştirilen bu çalışmada, spor basını okurlarının
düşüncelerini saha araştırmasıyla ortaya koymak amaçlanmıştır.Araştırmada elde edilen veriler, Konya’nın merkez
ilçelerinde yaşayan 405 kişiyle yüz yüze görüşmeye dayalı anket tekniği ile toplanmıştır.Bu çalışmada faktör analizi
yöntemiyle, örneklem kapsamında ulaşılan deneklerin spor gazetesi okumaktan elde ettiği doyumlara ilişkin
maddeler gruplanmıştır.Saha araştırması sonuçlarına göre; katılımcıların spor gazetesi okumasında etkili olan 3
faktör ortaya çıkmıştır. Bu faktörler önem sırasına göre merak/ayrıntı, eğlence/rahatlama ve bilgilenmedir.
Cerámica tartésica con decoración grabada. Nuevos testimonios
Authors: ESCACENA José Luis , DEL RÍO Alicia , LUNA María de los Ángeles
Published: October 2018

Damos a conocer en el presente artículo dos nuevos documentos cerámicos pertenecientes a vasijas tartésicas decoradas con temas geométricos mediante la técnica del grabado. Proceden respectivamente del Berrueco de Medina Sidonia (Cádiz) y del Cerro Mariana, en Las Cabezas de San Juan (Sevilla).
Paralelos en la musivaria romana de Grecia e Hispania. A propósito de un mosaico de Alcolea del Río y un pavimento de Mitilene
Authors: NEIRA JIMÉNEZ Luz
Published: October 2018

El presente artículo aborda las circunstancias del descubrimiento y los avatares posteriores de un mosaico hallado en Alcolea del Río (Sevilla), cuyos fragmentos se conservan en la Hispanic Society of America. El estudio de su composición refleja evidentes relaciones con otros mosaicos romanos, aunque el paralelo más estrecho se encuentra en un fragmentario pavimento de Mitilene (Lesbos), para el que se propone una hipótesis de reconstrucción.
Resultados de la I.A.U. realizada en la calle Terrones 4,6 (Córdoba)
Authors: CARMONA BERENGUER Silvia
Published: October 2018

La excavación arqueológica de la calle Terrones, 4 y 6, ubicada en el Barrio de San Basilio, se debe a la documentación de restos arqueológicos cuando se realizan los pozos de cimentación de unas viviendas. Por este motivo se paralizan las obras y se solicita una intervención arqueológica para valorar los daños causados. Los restos hallados consisten en un pavimento de losas de módulo califal que avanza en dirección Norte/Sur y en una estructura -posible cimentación de pilares- que, de igual forma, sigue cánones califales.
Historiografía de la arqueología como nueva corriente de interpretación. El siglo XIX en Córdoba
Authors: DELGADO TORRES Manuel
Published: October 2018

La historiografía como corriente de interpretación desde la que abordar la historia de una disciplina posee una larga tradición. La Arqueología española, aunque tarde, se ha incorporado con fuerza a dicho movimiento. Desde estas páginas trataremos de introducirnos brevemente en el contexto sociocultural en el que a finales del siglo XIX nacerán la prehistoria y la arqueología hispanas. Para facilitar la argumentación trabajaremos en tres niveles de análisis, nacional, regional y provincial.
Development of Advanced Field Optimisation Techniques in Karachaganak Integrated Asset Model
Authors: Zhumabayev Bolat , Pulotova Lailo , Kaziyeva Indira , Kadenov Almas , Wilson Timothy , Saada Tamer , Yergazin Serik , Brancolini Alberto
Published: October 2018

This paper presents the recent developments that have been achieved to improve the Karachaganak Integrated Asset Model (IAM). In 2014, SPE-172330 showed a step change in the application of integrated modelling techniques to this complex field and demonstrated the significant value of integration compared to standalone techniques.

The complexity of modelling and integration is driven by more than 120 operating wells (production and injection), a complex gathering system, multiple processing facilities and multiple export lines, combined with gas reinjection for reservoir pressure support. To correctly capture real operations, the model requires layers of constraints at well, facility and export levels and an appropriate line-up of wells to maximise field oil and gas production.

The model has been used to evaluate multiple field development projects with intensive capital investment worth several billions of US dollars. Hence, it is critical to ensure that the model is robust and replicates the reality.

The latest improvements presented in this paper include a description of a more enhanced field optimisation approach that fulfills oil and gas export as well as gas reinjection targets whilst respecting all of the field constraints. Optimising such a complex problem is a challenging task considering the number of variables and constraints in the system. Production well ranking for line-up selection has also been improved. Rather than following a single approach of well prioritisation, for example by well Gas/Oil ratio to maximise liquid production, in the new methodology wells are smartly picked to fulfill all export and gas injection targets.

Another improvement in the model was converting the optimisation logic, which was previously based on scripts, into open and transparent workflows using Visual Workflows in Resolve (application for connecting and running integrated models). This approach made it possible for Engineers to read, modify and extend the logic without having programming skills, bringing flexibility and sustainability into the model.

Several case studies of actual project evaluations using the improved Integrated Asset Model will also be discussed. These studies highlight the key results, the importance of the implemented improvements for decision-making and how these affect the bottom line of projects.
Geomechanics: A Key Input for Optimizing Drilling and Hydraulic Fracturing in a Depleted Oil and Gas Field in Kazakhstan
Authors: Kårstad Eirik , Zheng Yan , Lukpanov Akimzhan , Abzhanov Nariman , Giesemann Karl , Tyran Serik
Published: October 2018

The Akshabulak field in the South Turgayskiy basin is located in a Mesozoic intracontinental rift with an Upper Jurassic to Lower Cretaceous fill. The heterogeneous reservoir hosts significant oil and gas reserves and it has been successfully exploited with the implementation of hydraulic fracturing. After nearly 20 years of production, the reservoirs are significantly depleted and drilling new wells has been challenging. It became clear that an improved understanding of the geomechanical properties is required for delivery of a quality borehole and optimum hydraulic fracture stimulation for achieving long-term sustainable well performance.

This paper illustrates the workflow used for building the 1D-Geomechanical model required for optimum well construction and for optimizing the design of multi-stage hydraulic fracturing jobs. The one-dimensional model integrates basic petrophysical logs, dipole acoustic data, regional tectonic history, interpretation of mini-frac data and drilling data for identification of the current stress state.

The resulting best-fit 1D-Geomechanical model has been successfully applied on the latest wells drilled in this field. The new understanding of the in-situ stresses along with optimized wellbore stability predictions effectively balanced the risk of mud losses with the risk of borehole shear failures. Recently, a high quality horizontal well was successfully drilled towards the predicted best stress orientation, enabling optimal reservoir development and production.

Additionally, having a better understanding of the fracture gradient in the carbonate formation, which serves as a seal isolating the reservoir from the lower water zone, is critical. The new geomechanical model predicted a higher stress gradient as opposed to the established understanding of this formation. The hydraulic fracturing design was optimized by allowing a higher pump pressure during the stimulation treatment, which resulted in higher production without any sign of water breakthrough.

Consequently, a robust and effective geomechanical model has proven to be essential for enhancing recovery by improving the effectiveness of hydraulic fracturing, improving borehole quality by applying recommended optimal mud weights, as well as reducing NPT and costs by improving drilling performances.
Successful Application of Different Managed Pressure Drilling Techniques in Russia: Identification of Challenges and Selection of the Optimum Approach
Authors: Borges Sergio , Dobrokhleb Pavel , Krivolapov Dmitrii , Magda Andrey , Soroka Taras , Moiseenko Ivan
Published: October 2018

The utilization of managed pressure drilling (MPD) techniques has grown significantly over the past three years in the Russian Federation. This paper describes the application of MPD surface back pressure technique using both single and multiphase drilling fluid systems in several oil and gas fields located in Russia.

The Komi Republic is one of the biggest oil and gas producing areas in the European part of Russia and among Russia's top ten producers. Although the Yurkharovskoye oil and gas condensate field in Western Siberia is in the Tazov Peninsula, most of the field is situated offshore. That part of the field is developed from onshore locations using horizontal and extended reach development wells. In Eastern Siberia, the Yurubcheno-Tokhomskoye field is one of the biggest oilfields and presents highly fractured carbonates. Each field presents a different challenge and requires a specific approach.

The application of MPD technology improved drilling performance and helped avoiding non-productive time. Utilization of reduced mud weight with MPD procedures using a semi-automated system helped reduce lost circulation and safely control background gas, thus avoiding well control events in the Lambeyshorkoye, Komandirshorkoye, and Alabushina fields. In the Yurkharovskoye field, a high-pressure, high-temperature well was successfully drilled to TD with application of a fully-automated MPD system, which facilitated precise control of bottomhole pressure during drilling, pumps-off events, and tripping operations. A multiphase MPD technique helped achieve planned TD in horizontal sections in Riphean formations of the Yurubcheno-Tokhomskoye field without catastrophic fluid losses. By injecting oil-base mud with nitrogen, the equivalent circulating density (ECD) was drastically reduced, lowering the volume of losses up to 5 times. In addition, near balance conditions increased the ROP while drilling. The first ever multi-lateral well drilled with multiphase MPD was successfully completed on Yurubcheno-Tokhomskoye field with minimal mud losses and no well control events.

This paper will present details about how MPD technology makes it possible to drill formations with narrow mud weight windows where traditional approach was ineffective. The application of MPD technology helped successfully drill wells while reducing non-productive time, improving performance, and increasing the safety for personnel.
Life Extension of Pierce Field Production Facilities, North Sea, UK
Authors: Forsyth Murray , Pennings Bruno
Published: October 2018

The Pierce Field in the UK Central North Sea has production potential significantly beyond the originally anticipated life. A Life Extension project was initiated to develop a scope of work to refurbish and upgrade the facilities, suitable for the revised field life. The initial plan was to perform a ‘full reset’ of the facilities to extend their operating life for a further 15 years, but this resulted in a very long production outage (14 months) with an intense period of capital spend in the short term. With the low oil price environment emerging at the same time, there was a need to identify an alternative approach which would significantly improve the field cashflow by phasing the Life Extension work.

The revised approach was to develop a solution which had a more equitable balance of risk and value against cost, with production uptime a key value driver. Fundamental to this was building an understanding of the existing condition of the facilities and then developing a risk-based view of how they were likely to perform for the extended operational period. Focussing on the major risks and assessing them individually, ‘Decision-based’ roadmaps were then developed to plan the technical work required to enable decisions on mitigations to be made. A ‘Competitive Scoping’ mindset was used to ensure fit-for-purpose solutions were tailored to the specific risks. Starting from a ‘do-nothing’ perspective as the base-case, the incremental value of the mitigations was shown and compared to the level of risk reduction they brought. This then allowed decisions to be made on the optimum mitigation solution.

In addition to the technical assessment of the individual risks, the execution strategy was also developed and concluded that a phased approach was achievable and would significantly improve cashflow from the asset.

The result was a Life Extension ‘Programme’ rather than a single ‘Project’, where short, medium and long-term Life Extension scopes are scheduled according to their necessity. Each Life Extension scope will be managed as an individual sub-project and only executed ‘when required’. The revised strategy avoided an extended production outage in the short term, reduced total cost by circa 50%, and phased the spend over approximately 10 years.
Real Time Shipping
Authors: Vedat Kris , Eldred Morgan , Fernandez Francisco , Thatcher Jimmy
Published: October 2018

This paper puts forward a first of its kind integration and transparency of Offshore Supply Vessels providing global positioning, fuel analysis and manifest details on the Tengiz mega project. Thus, enabling the project to have a faster execution time. The methods of research and design used a data-driven and action-based methodology.

First, by the integration of disparate data, analysis on verification and then trend analysis to do a higher level of analytics. Machine learning techniques have been researched that when deployed will provide further enhancement to Caspian offshore planning work, that will significantly improve speed and efficiency on major capital projects.
3D Seismic Geomorphological Analysis of Potential Pre-Salt Hydrocarbon Reservoirs in South-Eastern Margin of Precaspian Basin
Authors: Eskozha Bazar Atashevich , Aimagambetov Marat Utegenovich , Brichikova Marina Petrovna , Shaikhina Dana Serikovna
Published: October 2018

The southeastern margin of the Precaspian basin is a prolific region with number of oil and gas fields in Mesozoic and Upper Paleozoic reservoirs. During the last decades, the productivity of Upper Devonian to Artinskian age structures in pre-salt section has been proven including Kashagan, Tengiz, Kairan, Ansagan fields and South-East Tasym structure. At the same time, the complex structure of predominantly carbonate sequence at depths of 5-7 km presents challenges in assessment of hydrocarbon potential.

With expansion of technical capabilities in high temperature and high pressure deep-hole drilling and new technologies in the field of processing and interpretation of seismic data, the prospect of discovering large oil and gas accumulations in the deep Devonian and Carboniferous formations is increasingly attracting oil and gas companies.

An attempt to analyze and summarize the results of the seismic interpretation of subsalt structures Maksat-Pionerskaya, Tazhigali-Pustynnaya, Kultuk Severny, Prorva Glubokaya, Ogay and Ansagan field (located close to the giant Tengiz oil field) using modern interpretation tools was made in this work. With an integrated approach applied in this work the geomorphology of horizons was significantly refined and showed the extended technological possibilities of using modern tools for interpreting seismic data.
Evaluation of Polymer Flooding Efficiency at Brownfield Development Stage of Giant Kalamkas Oilfield, Western Kazakhstan
Authors: Sagyndikov Marat , Mukhambetov Bolat , Orynbasar Yermek , Nurbulatov Aslanbek , Aidarbayev Sanat
Published: October 2018

This paper presents results of polymer flooding application to Kalamkas oilfield with high watercut and low recovery factor (RF).

The high layered vertical heterogeneity in permeability and unfavorable oil-water viscosity ratio in reservoir conditions (>20) of the field predetermined the need for chemical methods to enhanced oil recovery (EOR), such as polymer flooding.

Polymer flooding pilot has been conducted since 2014. The analysis is based on current and cumulative production data plus Production Logging Testing (PLT) and Injection Logging Testing (ILT) interpretations.

There is an improvement of vertical sweep efficiency in injection wells and blocking of washed water zones in production wells. The results of the EOR pilot show a decrease in watercut and an increase in the recovery factor.

Our calculations conducted on hard data from the oilfield confirm that a specially designed polymer flooding technology for Kalamkas brownfield development is plausible and commercial.
The First Comprehensive Study of Tracer-Based Technologies in Reservoir Conditions
Authors: Dulkarnaev Marat , Ovchinnikov Kirill , Gurianov Andrey , Anopov Alexey , Malyavko Evgeny
Published: October 2018

At the present time, it has become progressively more common for countries around the world to use tracer's methods of production logging in horizontal wells. The utilization of tracers/markers doesn't require well intervention with Coiled Tubing or tractors in order to obtain qualitative and quantitative data for inflow of reservoir fluid per interval. Tracer/marker technologies is a quantum leap in production logging as it is potentially capable of producing ten (10) to twenty (20) times more downhole data in a period of several years. The knowledge of downhole production in dynamics of years helps in developing oil and gas fields, locating neighboring wells to be drilled, optimization of horizontal lateral length or even a number of fracturing stages per well.

The principal difference between these technologies and traditional methods of well surveys (WS) is their ability to monitor the operation of ports or intervals in a well over a long period of time, with a significant reduction in resources involved, a reduction in costs and an enhanced production safety. However, the question remains whether the claimed specifications of tracer technologies correspond to the actual ones. Sometimes, the decision on the implementation of tracer PLT is made with weak quality assurance measures causing subsequent compromise of project results as a whole.

The value of this article is the development of a methodology for a comprehensive assessment of the operability, reliability and accuracy of operation for various tracer technologies available in the market. Based on results of this research being conducted, the article suggests recommendations from producer companies that can be used as technical criteria when selecting a contractor for tracer studies.
Evaluating Effectiveness of Stimulation Treatment in Karachaganak Multistage Wells
Authors: Kushkumbayeva Gulmira , Zhumabayev Bolat , Gabdullin Daniyar , Burmantsev Ruslan , Adeleke Justus , Saada Tamer , Burrafato Giovanni , Brancolini Alberto
Published: October 2018

The first objective of this paper is to present some correlations between formation acid response with stimulation type, reservoir quality, post stimulation injectivity index, productivity index and production logging flow contribution from each of the stimulated zones of wells in the Karachaganak field. The second objective is to provide recommendations on acid stimulation based on geological settings, lithology, petrophysical properties and presence of natural fractures in order to optimize hydrocarbon recovery in carbonate reservoirs in a cost effective manner.

An evaluation of the technical assessment of multistage stimulation based on lithology, porosity, natural fractures, stimulation type, injectivity and the production logging data flow contribution of each zone is the methodology for acid effectiveness measurement. The zonal injectivity of each well generated in Excel describes the pre- and post-stimulation injectivity relative to the stimulation type (acid wash, high rate matrix and acid fracturing). Utilization of Python's matlab to read Excel injectivity analyses data for all the wells further enabled generation of plots for multivariable analyses of the impact of various parameters on productivity. This paper presents the cost effectiveness of stimulation treatment types.

The observation and results of stimulation carried out in many wells shows that porosity, as a petrophysical parameter is not the sole driver of stimulation effectiveness as low porosity zones particularly limestone dominated can have enhanced natural permeability (vugs, fractures) and may have a chance to flow. The high rate matrix technique especially in high dolomitic formation showed better performance when compared to acid frac in the same formation type. Good porosity lithology zones with evidence of natural fractures and/or those that experienced significant mud losses treated with gentle acid wash or high rate matrix showed great productivity with production logging results. The zones close to the toe and the oil water contact treated with acid wash gave good productivity compared to acid frac that tend to intersect natural fractures and connect to the underlying aquifer.

The holistic approach to stimulation results evaluation in carbonate reservoirs is new and will add to the body of knowledge on the most optimal and cost effective acid stimulation type for carbonate reservoirs.
Acid Fracturing Depleted Carbonates Improving Very Low Reservoir Quality Inside Slim Horizontal Open Hole
Authors: Abd El Baky Amr , Al-Shuaibi Nawaf , Alboueshi Alaa Eldine , Elmofti Mohamed , Elafify Ebrahim , Alkhaldy Meshal , Allam Ahmed , Eid Walid , Ashkanani Anfal
Published: October 2018

The execution of pinpointed multi-stage acid fracturing inside 4-1/8-in. slim horizontal open hole sections is discussed. For the first time in Kuwait, pinpoint stimulation of 16 frac stages across a total 4,666 ft open hole while commingling three reservoir sections in very low reservoir quality carbonate rock was performed. Pumping rates were optimized while managing differential sticking hazards in the implementation of this frac procedure. Electric submersible pump completion deployment and well testing enhanced production by more than 100% over the anticipated rate.

Stimulation parameters were optimized with 2-7/8-in. tubing as the frac string for greater reservoir penetration and productivity enhancement. Differential sticking was addressed by removing drilling filter cake prior to the frac job. Possible risks were evaluated, and mitigation plans were implemented which resulted in the successful application of multi-stage acid fracturing across the open hole.
Real-Time Simulation of Deep Azimuthal Resistivity Tool in 2D Fault Model Using Neural Networks
Authors: Kushnir Dmitry , Velker Nikolay , Bondarenko Alexey , Dyatlov Gleb , Dashevsky Yuliy
Published: October 2018

In most cases, interpretation of resistivity measurements is performed using 1D multilayered formation models that are used to fit data locally in real-time applications. While drilling high-angle or horizontal wells, more complex scenarios may occur, such as faults, pinch-outs, or unconformities. In these cases, resistivity logging data inversion should be performed using at least a 2D model, which is a more complex computational problem. This paper presents a neural networks approach for solving this problem exemplified by the application of a deep azimuthal resistivity tool for geosteering in the vicinity of a tectonic fault.

The tool operational frequencies of 400 kHz and 2 MHz produce eight measurements with a coaxial arrangement of transmitters and receivers, and two azimuthally sensitive measurements with axial transmitters and transverse receivers.

This paper considers a 2D model of a tectonic fault composed of three parallel layers on the one side of a displacement plane and the same three layers on the other side dislocated at a certain distance along the displacement plane. The model is described with nine independent parameters. The artificial neural networks (ANNs) were designed and trained to calculate the tool signals based on the model parameters. The training was carried out using a synthetic database of 4·105 elements containing the model parameters and corresponding tool signals. The database was calculated using distributed computations with in-house Pie2D software that used the boundary integral equation technique.

To estimate the accuracy of the ANNs designed, the signals calculated with the networks were compared against the exact values obtained with Pie2D for an independent sample of 1.8·104 points. The comparison gave a good match for all 10 measurements, with the relative error comprising less than one standard tool measurement error for most points of the sample. Computation with the ANN required a few microseconds to calculate one signal, while the algorithm based on boundary integral equations required several minutes. The obtained acceleration of ~106 indicates many opportunities for modeling and inversion of logging-while-drilling data.
New Exploration Frontiers from Xinjiang, Northwest China----Low-Rank Coal Reservoir Character and CBM Exploration Potential in Junggar Basin
Authors: Yu Yuanjiang , Wang Yonghua , Liu Damen
Published: October 2018

Low-rank coalbed methane (CBM) in Junggar Basin has recently become a new exploration frontier across Xinjiang, Northwest China. The low-rank coal reservoir mainly develops in Badaowan Fm. (J1b) and Xishanyao Fm. (J2x) coal measures, especially featuring stable distribution, great thickness and moderate burial depth, which is favorable of CBM accumulation.

The pores of Jurassic coalbed reservoirs are mainly small-micro (<100nm) and large ones, among which the large and medium sizes account for a high proportion; and macroscopic and microscopic fissures are well developed in the reservoirs, leading to a great variation of the permeability. The shallow coal reservoirs are mostly undersaturated, and the gas saturation tends to increase toward the deep coalbed. The low rank coalbed reservoirs have strong ability to adsorb and accumulate CBM. In terms of horizon, the J2x coalbed reservoir has a stronger methane adsorption and storage capacity than J1b and better physical properties, making CMB recovery easier. In terms of region, the coalbed reservoirs in Changji--Urumqi--Fukang areas in the southern margin of the basin, Cainan--Balikun coalmine regions in the eastern part as well as the hinterland of the basin reach the level with methane-rich to extremely methane-rich coal beds and have strong ability to adsorb and store CBM.

Coalbeds of the basin have gas shows in common and good gas-bearing property. The low rank CBM takes a large proportion of the CBM resource, with huge potential. In light of Langmuir’s volume, the gas provinces are classified into four types: poor CBM zone (<8m3/t), CBM-bearing zone (8-15m3/t), relatively rich CBM zone (15-20m3/t), rich CBM zone (>20m3/t). The relatively rich CBM zones cover Wellblock Qing 1 to Qi 8, Changji--Urumqi--Fukang area and slope belt of northwest margin—basin hinterland; while the rich CBM zones include eastern Junggar basin and Balikun coalmine region. These areas together with the adjacent thick coal region and hinterland have a great potential in deep CBM development.

Since 2005, Changji Liuhuanggou block in the south Junggar basin has been selected as PSC block for venture exploration, and a series of CBM projects and researches have been carried out successively. Recently the CBM extraction from Dahuangshan coal mine in the south Junggar, industrial gas flow from the exploration well in the western Baiyanghe of Fukang block, and deep CBM exploration breakthrough in Baijiahai of the east Junggar demonstrated good progress in exploration and proved the huge potential of low rank CBM development.
Influence of Hydrogen Sulfide on Proppants Performance
Authors: Gorshkov Nikolay , Abdrazakov Dmitriy , Nesterova Svetlana , Bolyspayev Nurlan
Published: October 2018

Fast production decline is a well-known negative phenomenon after some hydraulic fracturing jobs. Reasonably, it is usually attributed to the fracture and reservoir parameters. One of the potential fracture parameters that might contribute to the production decline is conductivity of the proppant pack; this conductivity can be damaged by poor proppant condition. In this study, we investigate the influence of hydrogen sulfide (H2S) on the proppant conditions and performance.

The experimental study assessed the influence of H2S on proppant properties. The study analyzed not only the crush strength and sieve size alterations after exposure of proppant to high H2S content, but also the changes in proppant pack conductivity. Because the proppant pack conductivity is directly related to fluid flow within the fracture, this parameter should be considered as a key parameter for estimation of H2S influence on proppant pack performance.

According to test results, no significant influence of the H2S was revealed for all considered parameters. The proppant pack conductivity change was found to be negligible for the given conditions. Therefore, the influence of H2S on well productivity due to proppant pack conductivity impairment was not proved. The field cases and published examples presented in the current study also did not show evidence of proppant pack conductivity damage by the H2S.
To Find Karachaganak
Authors: Anisimov Leonid
Published: October 2018

The nature of the margins of the Precaspian Basin remains one of the most controversial issues, which at the same time, is crucial for determining the prospects of oil and gas potential. The success of the Karachaganak field discovery in 1979 is still not repeated, which is due to the suboptimal modeling of objects of this kind. A new approach to understanding the conditions of formation of carbonate massifs in the inner part of the depression as a consequence of the gravitational sliding of rocks from the side of the margins is proposed. This approach will allow more productive work on the search for structures of the Karachaganak type.
Markov chain Monte Carlo based on adaptive Metropolis algorithm applied in combined model to deal with the uncertainty of weights of single models
Authors: Xing Zhenxiang , Zhang Han , Ji Yi , Xinglong Gong , Fu Qiang , Li Heng
Published: October 2018

Reliability and validity of model prediction play a decisive role in water resource simulation and prediction. Among many prediction models, the combined model (CM) is widely used because it can combine the prediction results of multiple single models and make full use of the information provided by various methods. CM is an effective method to improve the predictive veracity but the weight of single model estimation is the key to the CM. Previous studies take errors as the objective function to calculate the weight, and the uncertainty of the weight of the individual model cannot be considered comprehensively. In order to consider the uncertainty of the weight and to improve universal applicability of the CM, in this paper, the authors intend the Markov chain Monte Carlo based on adaptive Metropolis algorithm (AM-MCMC) to solve the weight of a single model in the CM, and obtain the probability distribution of the weight and the joint probability density of all the weight. Finally, the optimal weight combination is obtained. In order to test the validity of the established model, the author put it into the prediction of monthly groundwater level. The two single models in the CM are time series analysis model (TSAM) and grey model (GM (1,1)), respectively. The case study showed that the uncertainty characteristic of the weight in the CM can be obtained by AM-MCMC. According to the study results, CM has obtained a least average root mean square error (RMSE) of 0.85, a mean absolute percentage error (MAPE) of 8.61, and a coefficient of determination (R2) value of 0.97 for the studied forecast period.
Structural Barriers to Pre-exposure Prophylaxis Use Among Young Sexual Minority Men: The P18 Cohort Study
Authors: Jaiswal Jessica , Griffin Marybec , Singer Stuart N. , Greene Richard E. , Acosta Ingrid Lizette Zambrano , Kaudeyr Saara K. , Kapadia Farzana , Halkitis Perry N.
Published: October 2018

Background:

Despite decreasing rates of HIV among many populations, HIV-related
health disparities among gay, bisexual and other men who have sex with men persist, with disproportional
percentages of new HIV diagnoses among racial and ethnic minority men. Despite increasing
awareness of HIV pre-exposure prophylaxis (PrEP), PrEP use remains low. In addition to exploring
individual-level factors for this slow uptake, structural drivers of PrEP use must also be
identified in order to maximize the effectiveness of biomedical HIV prevention strategies.

Method:

Using cross-sectional data from an ongoing cohort study of young sexual minority men
(N=492), we examine the extent to which structural-level barriers, including access to health care,
medication logistics, counseling support, and stigma are related to PrEP use.

Results:

While almost all participants indicated awareness of PrEP, only 14% had ever used PrEP.
PrEP use was associated with lower concerns about health care access, particularly paying for PrEP.
Those with greater concerns talking with their provider about their sexual behaviors were less likely
to use PrEP.

Conclusion:

Paying for PrEP and talking to one’s provider about sexual behaviors are concerns for
young sexual minority men. In particular, stigma from healthcare providers poses a significant barrier
to PrEP use in this population. Providers need not only to increase their own awareness of and
advocacy for PrEP as an effective risk-management strategy for HIV prevention, but also must work
to create open and non-judgmental spaces in which patients can discuss sexual behaviors without
the fear of stigma.
Cu-Fe Spinels: First Heterogeneous and Magnetically Recoverable Catalyst for the Ferrier Rearrangement of 2-Nitroglycals
Authors: Lafuente Leticia , Rochetti María Florencia , Bravo Rodolfo , Sasiambarrena Leandro , Santiago Cintia C. , Ponzinibbio Agustín
Published: October 2018

Cu-Fe spinels promoted the Ferrier rearrangement of 2-nitroglycals with several
O-nucleophiles. 2,3-Unsaturated carbohydrate derivatives were prepared by the reaction of 3,4,6-tri-Oacetyl-
2-nitroglucal and alcohols in the presence of 5 % of CuFe2O4. After separation of the catalyst with
an external magnet, the reaction products were obtained in good yields and high stereo and regioselectivity.
Also, S- and heterocyclic C-3 substituted 2-nitro-endo-glycals could be prepared by this method.
Searching for Potential Novel BCR-ABL Tyrosine Kinase Inhibitors Through G-QSAR and Docking Studies of Some Novel 2-Phenazinamine Derivatives
Authors: Kale Mayura , Sonwane Gajanan , Choudhari Yogesh
Published: October 2018

Background:

The computational studies on 2-phenazinamines with their protein targets have been carried out to design compounds with potential anticancer activity and selectivity over specific BCR-ABL Tyrosine kinase.

Methods:

This has been achieved through G-QSAR and molecular docking studies. Computational chemistry was done by using VLife MDS 4.3 and Autodock 4.2. 2D and structures of ligands were drawn by using Chemdraw 2D Ultra 8.0 and were converted into 3D. These were optimized by using semi-empirical method called MOPAC. The protein structure was downloaded as PDB file from RCSC protein data bank. PYMOL was used for studying the binding interactions. The G-QSAR models generated were found to possess training (r2=0.8074), cross-validation (q2=0.6521), and external validation (pred_r2=0.5892) which proved their statistical significance. Accordingly, the newly designed series of 2-phenazinamines viz., 3-chloro-4-aryl-1-(phenazin-7-yl) azetidin-2-ones (4a-4e) were subjected to wet lab synthesis. Alternatively, docking studies were also conducted which showed binding interactions of some derivatives with > 30% higher binding energy values than the standard anticancer drug imatinib. The lower energy values obtained for these derivatives indicate energetically favorable interaction with protein binding site as compared to standard imatinib.

Results:

G-QSAR and molecular docking studies predicted better anticancer activity for the synthesized azitidine derivatives of 2-phenazinamines (4a-4e) as compared to standard drug.

Conclusion:

It is therefore surmised that the molecular manipulations at appropriate sites of these derivatives suggested by structure activity relationship data will prove to be beneficial in raising anticancer potential.
Burkholderia Cepacia Complex Causing Pneumonia in an Immunocompetent Non-Cystic Fibrosis Patient: Case Report and Review of Literature
Authors: Datta Priya , Gupta Menal , Kumar Mani B. , Gupta Varsha , Chander Jagdish
Published: October 2018

Background:

Burkholderia cepacia complex is widespread in the environment and has been recognized as a cause of opportunistic pulmonary infections, particularly in patients with Cystic Fibrosis (CF). The natural ecology of the bacteria as part of plant growth-promoting rhizosphere provides stark contrast to its infectious potential. Its preponderance as a nosocomial pathogen may be due to its ability to survive in antiseptic solutions, contaminate equipments and intrinsic antimicrobial resistance.

Case:

An elderly, diabetic male was evaluated for hemoptysis, fever and cough. Chest computed tomography showed a thick walled cavity in the left lung and hilar lymphadenopathy. Sputum examination showed Gram negative bacilli and no acid fast bacilli. Sputum culture yielded growth of non-fermentative Gram negative bacilli on two occasions, but blood culture was sterile. The isolate was identified as B. cepacia by Matrix Assisted Laser Desorption Ionization-Time of Flight Mass Spectrometry (MALDI-TOF MS). The patient’s general condition remained poor and in spite of initiation of antibiotics, the patient expired after an episode of massive hemoptysis.

Conclusion:

This report raises concerns regarding the spread and severity of B. cepacia infection in non-compromised patients in the community and the need to suspect and identify it. Since the organism is inherently resistant to antipseudomonal penicillins, aminoglycosides and polymyxin B, differentiation from Pseudomonas spp. and determining antimicrobial susceptibility is paramount for treatment..
ANTECEDENTS AND CONSEQUENCES OF CARBON EMISSIONS’ DISCLOSURE: CASE STUDY OF OIL, GAS AND COAL COMPANIES IN NON-ANNEX 1 MEMBER COUNTRIES
Authors: Hapsoro Dody , Ambarwati Ambarwati
Published: October 2018

The purpose of this study is to determine the characteristics of companies that voluntarily disclose carbon emissions and to examine the economic consequences of the carbon emissions’ disclosure. Companies used in the sample are oil, gas and coal companies in non-Annex 1 member countries registered in the Osiris database. The observation period was from the commencement of the Kyoto Protocol's second commitment to date, or from 2013 to 2016. Measuring the carbon emissions’ disclosure is achieved by using a checklist developed from an information request sheet from the CDP (Carbon Disclosure Project). An assessment of the extent of the disclosure is made using the content analysis method. Company characteristics are proxied with leverage, profitability and firm age, while the economic consequences are proxied by using bid-ask spreads, the trading volume and share price volatility. The data analysis method used in this research is the Partial Least Square (PLS) method using the WarpPLS 4.0 application. Test results show that leverage, profitability and firm age have a positive effect on the carbon emissions’ disclosure. Furthermore, the test results show that carbon emissions’ disclosures have a positive effect on the trading volume and a negative effect on the bid-ask spreads and share price volatility. The above findings imply that firms with higher leverage, higher profitability and are older are more willing to reveal their carbon emissions’ disclosures. The more information that is contained in a carbon emissions’ disclosure, the more investors are interested in trading that company's shares, while the broader the carbon emissions’ disclosure is, the smaller the bid-ask spread and the less volatile the stock price are.
Conflict-Induced Displacement of Skilled Refugees: A Cross-Case Analysis of Syrian Professionals in Selected OECD Countries
Authors: Tigau Camelia
Published: October 2018

The mainstream literature on skilled diasporas has focused on economically-induced professional migration and free-choice mobility of educational elites. I introduce the concept of conflict-induced displacement of skilled refugees (CIDSR) to study the skilled Syrian refugees as political migrants who flee from violence and conflict in their home countries. I use a cross-case analysis of seven OECD countries (Brazil, Canada, Germany, Mexico, Turkey, the U.K. and the U.S.) to prove that the Syrian CIDSR is a crisis but also an economic and political opportunity. OECD countries take advantage of the skilled refugees in order to maintain growth in their aging economies, solve brain drain caused by internal conflict, as well as to strengthen their status as moral powers.