bluuebunny/crossref_metadata_2025_split huggingface dataset:
L’appropriation des réseaux socionumériques et les arts de l’encadrer : pour une prise en compte des rapports de force entre utilisateurs et dispositifs
Authors: Stenger Thomas , Coutant Alexandre 
Published: April 2016

L’enthousiasme pour les réseaux socionumériques est associé à une grande variété d’usages et de finalités qui révèle une forte flexibilité des dispositifs. Avec près d’un milliard et demi d’utilisateurs actifs chaque mois, Facebook constitue un cas particulièrement intéressant pour étudier l’appropriation d’une plateforme socionumérique. Quelles sont précisément les formes d’appropriation ? Comment ces plateformes gèrent-elles ces appropriations ? À partir d’une analyse secondaire de données qualitatives issues de deux projets de recherche, une variété de cas d’appropriations est analysée grâce au développement d’un cadre théorique original réunissant les approches d’Akrich (1998) et de Certeau (1990). La première approche permet d’identifier et de décrire les formes-types d’appropriations opérées par les utilisateurs. La seconde permet de comprendre quelles formes sont encouragées, tolérées ou prohibées par les plateformes. Les rapports de force entre utilisateurs et dispositifs sont révélés à travers leurs positions tactiques ou stratégiques. Les contours d’un management de l’appropriation sont ainsi esquissés en distinguant cinq « arts d’encadrer » l’appropriation qui correspondent aux arts de faire avec l’appropriation des utilisateurs. La recherche s’inscrit dans la perspective socio-politique de l’appropriation des SI et contribue à la théorisation d’un management de l’appropriation des SI. Loin de consacrer un usager tout puissant ou de célébrer l’empowerment des utilisateurs, elle souligne que l’appropriation est un rapport de force, largement en faveur des dispositifs dans le cas des réseaux socionumériques.
Drivers and barriers to pre-adoption of strategic scanning information systems in the context of sustainable supply chain
Authors: Lesca Nicolas , Caron-Fasan Marie-Laurence , Loza Aguirre Edison , Chalus-Sauvannet Marie-Christine 
Published: April 2016

Cette recherche porte sur l’adoption d’un système d’information (SI) de veille stratégique (VS). Plus précisément, elle porte sur la phase de pré-adoption, c’est-à-dire l’émergence de l’idée d’un tel système et l’évaluation de son besoin pour l’organisation, en amont de considérations technologiques. La question de recherche est la suivante : quels sont les motivations et les freins qui influencent la pré-adoption d’un SI de VS ? L’objectif est ainsi de contribuer à enrichir les connaissances sur un sujet qui a été peu abordé dans la littérature. L’originalité de l’article est de mobiliser les travaux sur les processus porteurs de changements institutionnels isomorphiques du cadre néo-institutionnel pour étudier la pré-adoption dans le champ de la VS. Sur la base d’une démarche multi-méthodes, qui combine étude exploratoire qualitative et quantitative, dans le contexte spécifique de la logistique durable (LD), nos résultats révèlent 31 motivations et freins à la pré-adoption d’un SI de VS, dont dix nouveaux, et cinq types de pressions. Ils suggèrent ainsi que la pré-adoption d’un SI de VS peut être soumise à la fois à des pressions fonctionnelles et institutionnelles. Elle peut être motivée par des objectifs de compétitivité et de mimétisme, et freinée par des objectifs de performance et par l’absence de pressions coercitives. Ces résultats questionnent finalement la compréhension par les entreprises du caractère stratégique du SI de VS, ainsi que le rôle et la responsabilité de l’Etat dans le développement de la LD et l’adoption de SI de VS dans le contexte de la LD.
Risk Based Integrity Management System for FLNG Hull Structure
Authors: Ilahi Mahboob , Kar Suman , Mukherjee Kaushik , Ayob M. Sapihie B. 
Published: April 2016

Abstract
Risk based inspections (RBI) of FLNG Hull structure provide an optimum solution to maintain the structural integrity of FLNG Hull structure. Implementing the methodology provides strategic planning for maintenance by reducing the anticipated risk. Hence, ensuring uninterrupted service of the FLNG carrier throughout the service life.
This paper presents a systematic approach for maintenance of the integrity of FLNG Hull. The methodology offers a procedure to acquire necessary design data, inspection plans, operational and maintenance records to maintain the integrity. RBI process is used for FLNG in order to investigate all degradation and failure mechanisms. The RBI will ensure that inspection and monitoring activities will be concentrated on structural critical elements (SCE) that contribute the most to the risk. These structures will be identified by qualitative and semi-quantitative risk assessment methods.
The methodology requires all necessary data e.g. design, operation, inspection and maintenance. All components are tagged for identification purpose. Different possible damage mechanisms are identified. Qualitative Risk Assessment are performed along with Reliability Analysis. Risk is evaluated based on 5×5 PETRONAS HSE Risk Matrix. A practical and optimum risk based inspection framework is prepared prioritizing maintenance and repair work. The whole process is in line to meet all the integrity requirements from stability for continuous operations.
The methodology offers optimum solution to ensure the integrity of FLNG hull during the service life is intact for continuous operation.
A New Classified Combination System of In-Depth Profile Modification for Multilayered Commingled Reservoir in China Offshore Oilfield
Authors: Xiaofei Jia 
Published: April 2016

Abstract
To solve the problem of poor effect of single profile modification agent for multilayered commingled reservoir in offshore oilfield at high water-cut stage, a new classified combination system of in-depth profile modification system was designed based on reservoir characteristics.
Pressure index method was studied for profile modification decision-making, laboratory experiments was studied for screening classified combination system for profile modification, water-swelling property of particle in dispersed phase were tested, porous flow theory was studied for matching relationship between reservoir pore-throat and particle size, a model for calculating particle size which matched the original reservoir was built by using Weibull distribution function, and the model was modified by considering pore structure change after longtime waterflooding and formation heterogeneity, and particle diameter range which matched the post-reservoir formation was obtained with taking particle water-swelling property into account.
Laboratory experiments showed that injection of high-intensity(final frozen strength 0.07 MPa) profile modification agent in continuous phase after injection of low-intensity(final frozen strength 0.05 MPa) agents provided a recovery efficiency which was 3.1% higher than that by reverse injection sequence, and injection of profile modification agent with small particle size(initial particle size 0.5-3.0 µm) in dispersed phase after that with large particle size(initial particle size 50-500 nm) contributed a recovery efficiency which was 4.1% higher than that by reverse injection sequence. Highest plugging rate was obtained when the ratio of dispersed phase particle size after expansion to that of pore throat inside formation was 1, and it was required that initial particle diameter was less than 1/7 of pore throat diameter, and minimum particle diameter after expansion was greater than 1/3 of pore throat diameter. Proposed technology was applied in SZ oilfield. Results from two well patterns which conducted proposed technology in 2014 indicated that water cut reduction ranged from 5.0% to 13.0%, accumulative oil production increased by 3,4000 m3 and oil recovery of the pilot zone was enhanced by about 0.5%, which suggests that new classified combination system of in-depth profile modification had good prospect in conventional heavy oil reservoirs of China offshore oilfield.
If appropriate profile modification agent is selected according to the reservoir property and optimized combination of profile modification system is designed, the best effect of profile modification at high water-cut stage can be achieved. Classified combination system of in-depth profile modification based on reservoir characteristics is a new idea and it is an effective way for developing multilayered commingled reservoir at high water-cut stage, it is also an important trend to adjust the water injection profile for high water-cut stage reservoir.
A Novel Mining Approach for Seafloor Massive Sulfide Deposits
Authors: Spagnoli G. , Rongau J. , Denegre J. , Miedema S. A. , Weixler L. 
Published: April 2016

Abstract
Sulfidic polymetallic ore deposits, known as seafloor massive sulfides (SMS) occur on the seabed as precipitation products from hot hydrothermal solutions as a result of mixing with cold seawater and are usually found at depths between 1,500 and 4,100 m. These deposits are formed basically in tectonically active spreading zones of oceans (mid-ocean ridges and "back-arc" spreading systems) and are the result of the global heat transfer from the mantle above the oceanic crust into the water column. In these SMS deposits, metals such as copper (Cu), zinc (Zn) and lead (Pb) as well as trace elements of silver (Ag), gold (Au) and rare antimony (Sb), cadmium (Cd), gallium (Ga), germanium (Ge), and indium (In) are present. This paper describes a novel technology for mining SMS deposits based on the vertical cutting approach developed by a joint research between BAUER Maschinen GmbH and Technip. A hyperbaric mathematical cutting model has been used to calculate the forces needed to excavate SMS deposits in water depth up to 2,000m. The model shows that in hyperbaric conditions, what influences the cutting energy is the water column rather than the geomechanical properties of the rock. Based on the mathematical model a preliminary cutting tool design is shown.
Data-Driven Comparison Between Solid Model and PC-SAFT for Modeling Asphaltene Precipitation
Authors: Abouie Ali , Darabi Hamed , Sepehrnoori Kamy 
Published: April 2016

AbstractSelecting an appropriate Equation of State to model asphaltene precipitation in compositional wellbore/reservoir simulators is still unclear in the literature. Recent studies have shown that PC-SAFT is a more appropriate model for asphaltene precipitation compared to the commonly used solid model. The main objective of this paper is to compare the solid model and PC-SAFT in both static and dynamic asphaltene modeling. Through fluid characterization, the capabilities of both models are compared to reproduce precipitation experimental data.The results show that both solid model and PC-SAFT are capable of accurate modeling of asphaltene precipitation. Although matching process using PC-SAFT is much easier, solid model is also able to reproduce the experimental data with the same quality as PC-SAFT, if it is tuned properly. The simulations showed that PC-SAFT is superior to solid model in terms of accuracy for extrapolation when the experimental data are not available for the simulation conditions (i.e. variation in temperature, pressure, and fluid composition in the reservoir/wellbore). However, both models are applicable for interpolation when the experimental data covers the range of simulation condition. The wellbore simulations show that although the trend of asphaltene deposition is similar for both models, solid model overestimates the amount of asphaltene precipitation and deposition in the wellbore compared to the PCSAFT model. On the other hand, since PC-SAFT uses an iterative procedure for finding the density roots, phase equilibrium calculation, and consequently, the simulation procedure takes much more computational time when PC-SAFT is used.
Real-Time Sample Confirmation with Wireless Acoustic Technology During Downhole Sampling
Authors: Mataruco Antônio , Harner Lauren , Castellões Leonardo 
Published: April 2016

Abstract
Having full knowledge of the reservoir is crucial for the development of any hydrocarbon reservoir. Beyond gathering information about skin, boundaries, effective permeability, and production rates, knowing what type of hydrocarbons are being produced is often the key to optimizing the reservoir's production (i.e., reducing costs and raising profits). This paper describes the process of using wireless acoustic technology during downhole sampling to obtain important information to aid in the development decisions for a reservoir.
During the sampling process, valuable insight is gained about fluid sample collection, retention, and basic composition. This information can help the operator gain a better understanding of what is occurring during the lifecycle of the sampling event—before and after sample collection, during sample recovery to the surface, and in the sample transfer. Being able to follow each stage of the sampling process in real time provides important data that confirms whether the sample remained in single phase, as a representative fluid sample, for the entire duration of the well test. It is important to keep the sample at high pressure during the recovery process to ensure a monophasic sample. This is accomplished with a nitrogen pressure-compensation system to maintain pressure during recovery.
In addition, using the pressure from the common nitrogen chamber inside the sampling system in conjunction with the new data interpretation system, it is possible to confirm, in real time, the basic composition of the samples (black oil, volatile oil, condensate, dry gas, water) that are captured inside the sampler chamber housings. Additionally, the number of samples collected and the retention of those samples can be determined.
This type of knowledge about the sampling event is normally obtained once the toolstring has been pulled to surface and after the sampling cylinders have been sent off to the lab for pressure, volume, and temperature (PVT) analysis. Gaining insight into the characteristics of the reservoir in real time allows for operational decisions to be made quickly, ensuring necessary sample collection, thereby saving time and money.
Analysis of Wellbore Stability Management and Surveying Time When Using MWD Survey RPM on Cessation Method in Drilling Operations
Authors: Monterrosa Leida C. , Zegarra Erica , Soto Reinaldo A. , Celis Criss M. , Lowdon Ross 
Published: April 2016

Abstract
This paper explores various case studies to evaluate how an innovative methodology for sending MWD surveys up hole, based on cessation of surface RPM rather than variations of mud flow rate, helps drilling operations become more cost effective, decreasing wellbore stability & HSE risks, reducing surveying time and optimizing connection procedures.
Conventional surveys are taken by recycling the mud pumps. Mud flow is brought to below the MWD turn-on rate in order to switch off the tool and trigger the survey, and then the flow is increased to above the turn-on rate and the survey is sent to surface. Surveys based on RPM cessation use a different technique that allows the MWD tool to take the survey and to transmit it to the surface acquision system when it detects that the rotation has being stopped, allowing the mud flow to remain unchanged and removing the need to recycle the pumps.
Various distinct applications were analyzed in terms of MWD surveying time, wellbore stability and stuck pipe risks to evaluate the impact of this new approach in drilling operations. The cases analyzed deal with the following aspects: reduction of stuck pipe events in projects with high risk wellbore stability issues, ECD and pressure management in MPD projects, anti-collision avoidance and overall reduction of rig time for projects taking MWD surveys before connection.
It was concluded that more and more phases of a well construction have seen the benefit of this methodology as it has greatly contributed to the efficiency of drilling operations and in some of the cases allowing the fulfillment of the well objectives by the significant reduction of drilling risks, in comparison with the conventional way to take MWD surveys.
This is a novel approach to take MWD surveys and send them up-hole; very little has been written in industry literature about how its application enhances the reduction of key drilling challenges such as reduction of stuck pipe events. This will allow operators and contractors to push the envelope even further, in scenarios where extra fluctuations in the mud flow are adding significant financial or HSE risks.
Offshore Wind Farm OWF Installation Best Practices Based on Field Experience
Authors: Ekici Deniz , White Mike , Drunsic Michael 
Published: April 2016

Abstract
Offshore Wind Farm (OWF) operations have a significant growth potential outside of the North Sea, which is the only part of the world at the moment with a significant operational offshore wind farm presence. However, there are multiple pilot projects around the world in progress. Similar to other construction industries, one of the most critical and high risk phases of a project is the installation phase, particularly the marine components. Marine operations are inherently more complex compared to land-based installation operations, due to involvement of more sophisticated machinery to address the hindrances of performing construction activities in the marine environment. This paper highlights some of the critical installation points in a typical offshore wind farm project, as experienced first-hand during recent offshore installation campaigns in Northern Europe.
Logistics and Supply-Chain Management in Offshore Wind Farm (OWF) Applications
Authors: Drunsic Michael , Ekici Deniz , White Mike 
Published: April 2016

Abstract
The offshore wind industry is experiencing significant global growth and with the first offshore wind project in the United States currently under construction, the budding U.S. market is poised for growth. One of the significant differentiators between new entrant markets such as the U.S. and the established European market, is the existence of an established and relatively mature supply chain. Even with the developed supply chain in Europe, there is still significant opportunity for cost reduction and effective supply chain management can be a key factor for realizing these opportunities. Construction of offshore wind projects requires a robust supply chain management system to manage the complex logistics and flows of goods and services. The serial nature of the manufacturing and installation of offshore wind farm components combined with the large sizes of the components necessitates specialized equipment and approaches to supply chain management. In emerging markets such as the U.S., additional challenges associated with vessel restrictions (e.g the Jones Act[1] and the Cargo Preference Act[2]), port infrastructure limitations, and limited domestic manufacturing of key components increase the need for strong supply chain management to ensure successful projects. The installation and transportation infrastructure, equipment, and logistics represent critical areas of the supply chain and there are numerous areas where the U.S. market can build upon experience from European experience. As the offshore wind industry develops in North America, effective supply chain management will be critical to delivering the first projects and ensuring offshore wind can be a competitive contributor to the energy supply mix.
Drilling Technology: Drill Cutting Remediation System (DCRS) for Subsea Top Hole Drilling
Authors: Price William R. 
Published: April 2016

During subsea field development, a significant amount of drill cuttings, mud and cement, is discharged on the seabed while the tophole sections of subsea wells are drilled and cased before the BOP and drilling riser are set in place atop each well. Discharging this material at the wellhead can reduce visibility and make ROV operations more difficult. In fields where multiple wells are drilled in a small area, the large volume of discharge can cover the seabed with a layer of material of 90 feet or more, enough to bury manifolds and complicate hardware installation. In some cases, an intervention vessel is required to move the accumulation of discharged cuttings before the installation of the production infrastructure.
A Drill Cutting Remediation System (DCRS) was developed to address these issues during top hole drilling by diverting discharged cuttings and cement away from the wellhead and clear of te areas planned for subsea infrastructure. The system consists of a Wellhead Funnel (WHF) placed on the wellhead to capture the cuttings and cement, and a subsea dredge, connected to the WHF with hose, which transports the material outside the field perimeter to keep the near-well area clean and to keep the water clear.
While it can be applied to single wells, the DCRS provides the greatest benefit in drilling campaigns with multiple wells that are batch set in a small area. The DCRS can be deployed without impacting critical rig time. The system helps maintain water clarity and visibility for ROV operation and other activities. The DCRS removes potentially troublesome cement discharges and prevents their buildup in the near-well area. In addition, the seabed is kept clear to enable efficient installation of manifolds, jumpers and hydraulic and electrical flying leads (HFL and EFL).
The DCRS has been applied in the Gulf of Mexico on two batch-set projects and one single well project, saving time and money. The DCRS has the potential to provide similar advantages in subsea fields around the world.
Widened Safe Mud Window for Subsalt Well Sections: A Workflow and Case Study
Authors: Shen Guoyang , Shen Xinpu 
Published: April 2016

Abstract
This paper presents a 3D numerical study on the mechanical behaviors of natural fracture under injection loading, and further proposes a practical workflow for designing a widened safe mud weight window (MWW) for drilling subsalt well sections with natural fractures. The original safe MWW value for subsalt well sections is usually narrow. More specific, for a subsalt well section with natural fractures, no safe MWW existed because of this unfavorable geological environment. Therefore, hydraulic plug technology was adopted to reinforce wellbore stability and widen the MWW. The value for opening a natural fracture under the given mud-weight pressure was numerically calculated, and then used for selecting the lost circulation material (LCM) treatment size. In addition, stress cage, which is quantified by enhancement of hoop stress at the wellbore surface, was numerically analyzed.
An illustrative example is performed with information from a well in a deepwater Gulf of Mexico (GOM) field. It is observed that a fracture with initial width of 0.5 mm opening to 0.664 mm will result in an increment of 0.55 lbm/gal mud weight. This solution is obtained with assumption of one pair of natural fractures. In the case of two existing pairs of fractures, a 1.1 lbm/gal increment of mud weight can be directly obtained for this set because of the linear property of the model,.
The case study described in this paper provides a workflow for widening the MWW for safe drilling through a naturally fractured subsalt well section. A best practice for using this type of MWW design is also presented.