bluuebunny/crossref_metadata_2025_split huggingface dataset:
Simulation of Hydrodynamic Conditions of Bottom-Hole Zone of Well to Test a Capsulated Corrosion - Scale Inhibitor
Authors: Aygiz Khazhiev , Alexander Faresov 
Published: October 2015

Abstract
This article describes a new approach to laboratory tests to determine the period of effective operation of a capsulated corrosion - scale inhibitor in the course of downhole oil production. The urgency of this method lies in the laboratory simulation of service conditions for a well with certain operating practices and also in determination of the period of effective operation of a capsulated corrosion - scale inhibitor. The effective operation of the capsulated inhibitor of complex action means its ability to be carried uniformly and in the required amount out from the well together with the associated produced fluid and its ability to provide the necessary protection against corrosion for downhole equipment during the whole period of production.
The below described technology can be applied, in our opinion, to protect the downhole equipment against corrosion by loading of the capsulated corrosion - scale inhibitor in the zone of mechanical impurities of well fluids surge (ZMIFS). The technology of capsulated inhibitors application provides a controlled carrying out of the inhibiting component for a long period of time. In case of application of the corrosion - scale complex inhibitor, equal time periods of effective carrying out from the capsule are required for corrosion inhibitor and scale inhibitor.
We have developed a laboratory flow testing unit which allows to simulate the operating conditions of a certain well. Based on the foregoing, the experimental testing unit is a flow-type outline that includes two sections for testing. Using this testing unit one can determine the period of carrying out of one unit of capsulated corrosion inhibitor per one unit of volume of the simulated corrosive environment in order to provide more efficient protection against corrosion and scaling.
The results of laboratory tests have been used for quantitative calculations of inhibitor demand for pilot tests in the producing wells of PJSC "RN-Nyaganneftegaz."
Investigation of Effect of Suspended Solids in Extracted Fluid on Pump Performance and Development of Means for Catching them
Authors: Isaev A. A. , Takhautdinov R. Sh. , Malykhin V. I. , Sharifullin A. A. 
Published: October 2015

Abstract
Presence of mechanical admixtures in the form of suspended solids (SS) causes wear of a rotor surface and, particularly, elastomer.
Wear of friction surfaces leads to hydraulic head and efficiency losses of Progressing Cavity Pump (PCP) due to decrease in tightness of contact between an elastomer and a rotor.
Test bech has been designed (Fig. 1) to study the effect of wear rate on head-capacity curves of PCP unit. The bench consists of the frame 1, legs 2, tank 3, pipelines 4, drive motor 5, rod 6, shut-off valves 7 and measuring tools.
The Method of Determining the Effectiveness of Dispersant for Oil Spill Response at Icy Seas
Authors: Salnikov Aleksander V. , Gribov Grigory G. 
Published: October 2015

Abstract
The most efficient way to eliminate oil spills in icy seas is the way of using dispersants. However, for to-day doesn’t exist not only universal dispersants for these purposes, but also methods of determina-tion of their efficiency. Tests, which are known in world practice, in a different measure display interac-tion of water-oil mixture with a dispersant, are expensive, possess insignificant convergence and repro-ducibility, and in Russian Federation are applied restrictedly.
On the basis of the carried-out analysis of the ways of determination of efficiency of dispersants exist-ing in world practice, this work is offering the new express method of determination of efficiency of dis-persants for the ice seas developed in Ukhta State Technical University together with LLC «USTU Oil and Gas R&D Institute».
The method, offered in work, can be used for an assessment of efficiency of dispersants for elimina-tion of emergency oil spills in the icy seas of the Arctic region in the conditions of the wide range of tem-peratures and salinity of water, and can become alternative to foreign analogs.
The method possesses considerable knowledge intensity, doesn’t demand expensive equipment and highly skilled personnel, and also allows carrying out several parallel experiments.
Net Environmental Benefit Analysis in Planning of Elimination of Oil Spills
Authors: Alekseevna Natalya , Seryy Sergey Sergeevich 
Published: October 2015

Abstract
Intense development of oil and gas deposits on sea shelves and inner pools is one of the most powerful factors of negative impact on water environment and biological resources owing to inevitability of emergency spills of liquid hydrocarbons. Now, choice of ecologically suiting technologies and methods of oil spills liquidation in global practice based on net environmental benefit analysis (NEBA). NEBA is a process of decision making in the time of choosing methods of oil spills liquidation, which provide the less negative impact on the environment in every case. The main reason for making such an analysis is a presumption that not only oil spills but also operations for its liquidation could have negative impact on the environment. The decision of using such technologies as dispersion and burning oil on the spot is made only according to NEBA. Order of making this analysis from the point of ecological advantages of applying technologies of oil spills liquidation is presented fully and by stages and also analysis of ecological impact of using these technologies was made. The competent and timely analysis of ecological consequences of application of technologies of elimination of pollution will lead to the minimum negative impact on marine and coastal ecosystems.
Best Configuration of Horizontal and Vertical Wells for Heavy Oil Thermal Recovery from Thin Net Pay Zones
Authors: Khisamov Rais , Zaripov Azat , Shaikhutdinov Damir 
Published: October 2015

Abstract
Pilot projects on heavy oil production in the Republic of Tatarstan proved the efficiency of Steam Assisted Gravity Drainage (SAGD) and Cyclic Steam Stimulation (CSS) technologies for horizontal wells. This paper discusses ways of improving CSS technology and search for alternative methods of extra-viscous and heavy oil production from thin net pay zones. Various configurations of vertical wells and a single horizontal well have been considered. It has been shown that using vertical wells in combination with a horizontal well can provide a two-fold increase in ultimate oil recovery compared to CSS method. The best configuration has been identified to provide maximum recovery of heavy oil from thin pay zones. Pilot test program has been developed to test the suggested well configuration in the Ashalchy pilot area.
Modern Geosteering Technologies as the Enhanced Efficiency Method of Reserve Development in Marginal Zones—Bottom Waterdrive Reservoir of Vikulov Suite at Kamenny License Area, Krasnoleninskoye: Field Case Study
Authors: Melnikov L. P. , Zharkov A. V. , Akhmadishin A. T. , Islamgaliev R. F. , Kiselev V. Y. , Kirpischikov Y. V. , Bikchandaev E. Z. , Zaboev K. O. , Doronin R. A. 
Published: October 2015

Abstract
Hydrocarbon deposits of the Vikulov suite are currently the primary development targets for OAO "Rosneft-Nyaganneftegaz." More than 90% of the base production from the Em-Yogovskiy and Kamenny license areas consists of these horizon reserves. This became possible by drilling out conventional traps, dome, and incised river valley areas with lower oil water contact (OWC) than in other areas.
In spite of this, less than a half of the oil in place reserves of this horizon appear to be involved in production, though much of these reserves are marginal zones.
The primary problems developing such reserves are relatively small net oil thickness (net pay thickness), the presence of mobile water, high OWC, and the absence of a reliable seal between oil-saturated (VK1) and water saturated horizons (VK2 and VK3). All of these factors contribute to the reduced efficiency of the primary method for production stimulation in this horizon—hydrofracturing.
One solution to help address the current situation is drilling of horizontal wells in oil-saturated upper layers.
When developing these reserves, it is particularly important to create an accurate and detailed geological model of the deposit to help identify high-risk zones with potential minor faults. When drilling in a formation of true thickness less than 2 m, it is necessary to know the exact location of the borehole in relation to the structure to help prevent, if possible, drilling out of the reservoir.
Fines-Migration-Assisted Low-Salinity Waterflooding: Field Case Analysis
Authors: Bedrikovetsky Pavel , Zeinijahromi Abbas , Badalyan Alexander , Ahmetgareev Vadim , Khisamov Rais 
Published: October 2015

Abstract
Low salinity waterflooding is presently one of the most promising EOR methods. Wettability alteration and residual oil decrease are the most important EOR mechanisms of low salinity waterflooding. However, the mobility control EOR due to fines migration, induced by low salinity water, and the consequent flux diversion is also an important feature of the smart waterflooding. We analyze the limited available field data from 10 years of low salinity water injection in Bastrykskoye field (Russia) and 24 years of production from Zichebashskoe field (Russia) which includes 7 years of low salinity water injection. The mathematical model for fines-assisted waterflooding is used for history matching resulting in good agreement between the field and modelling data. The model is used to compare recovery factor for two scenarios of low salinity water injection and formation (normal) water injection. Low incremental recovery and low decrease in the amount of produced water during the development of both fields is explained by the production of significant amount of the reservoir water before the commencement of low salinity water injection and also the injectors placing.
Automation of the Flooding Optimization Process and Selection of Prospective Sites/Wells for Workover
Authors: Syrtlanov V. , Mezhnova N. , Kovaleva E. , Golovatskiy Y. , Petrashov O. , Zhirov A. , Kurelenkova Y. 
Published: October 2015

Abstract
The paper considers workover selection problems and flooding optimization in the mature fields.
The paper discusses the approaches for automation of selection of blocks / wells with good potential for workover activities (sidetracking, hydraulic fracturing, perforation to other layers) and flooding optimization activities based on 3D simulation modelling.
The process of prospective sites selection includes reservoir characterization and reserves estimation based on both modelling and engineering techniques.
The approach presented in this paper includes preliminary calculation of performance of wells workover activities followed by automated preparation of workover parameters for the further detailed calculation based on reservoir simulation.
Example provided in this paper demonstrates the implementation of the discussed approach to the one of Russian oilfields.
4D Seismic for the Filanovsky Field Reservoir Monitoring - Interdisciplinary Earth Models Integration Technique
Authors: Aristarkhov Anton 
Published: October 2015

Abstract
4D seismic monitoring appears to be quite an expensive and pinpoint tool to increase the efficiency of oil and gas fields' exploitation. To reach the desired profit results, it is necessary to select candidate-fields very accurately and provide individual monitoring parameters on every stage. In this work, the opportunity of a 4D marine seismic survey on the Filanovsky field, which is prepared for development, is being examined. The questions of technique's efficiency in these particular geological and geographical conditions are discussed. To conduct a feasibility study, 4D seismic modelling of possible reservoir development effects was performed and the most suitable design of marine 4D seismic survey was proposed considering international experience of such projects.
A full package of interdisciplinary information was utilized as initial data: 3D seismic interpretation results, AVA seismic inversion results, well log data interpretation, core data laboratory testing results, results of reservoir simulation and geomechanical modeling. 4D modeling was performed by calculating 3D elastic parameter models for various periods of field development according to flow simulation and geomechanical modeling results. Then these petro-elastic models were used to generate synthetic seismic volumes. The possibility of 4D seismic effects appearance was proved based on the modeling outcome.
After analyzing the latest field survey techniques of 4D seismic monitoring, the most effective scenario of their realization on the Filanovsky field was suggested taking into account all the specific aspects of geology and the local area. The 4D marine survey was completely designed according to all efficient parameters calculation.
Field Tests of a New Generation of Flow Control Unit Able to Prevent the Gas Breakthrough in Oil Wells
Authors: Delia S. V. , Chertenkov M. V. , Zhakovschikov A. V. , Matsashik V. V. , Zhuravlev O. N. , Shchelushkin R. V. 
Published: October 2015

Abstract
This article reports the results of field testing of new generation flow control system (ICD) carried out in wells No. 128 of the Kotovskoe Field and No. 11 of the Yu. Korchagin Field by OOO LUKOIL-Nizhnevolzhskneft. The new well completion system reported herein has been developed and is manufactured in Russia. Its distinctive feature is the possibility of adaptation to production conditions and producing additional impedance for the passing gaseous phase regardless of pressure drop for the liquid phase. The new ICD significantly reduces the gas factor and prevents free gas breakthrough in the oil well.
This article also reports the results of bench testing carried out at the flow control system development stage. Further the equipment was installed into the wells as a recompletion system. We present results of daily average gas and oil rate measurements before and after the installation of the flow control equipment. The tests were run in different well operation modes.
Acrylamide‐Forming Potential and Agronomic Properties of Elite US Potato Germplasm from the National Fry Processing Trial
Authors: Wang Yi , Bethke Paul C. , Bussan Alvin J. , Glynn Martin T. , Holm David G. , Navarro Felix M. , Novy Richard G. , Palta Jiwan P. , Pavek Mark J. , Porter Gregory A. , Sathuvalli Vidyasagar R. , Thompson Asunta L. , Voglewede Paul J. , Whitworth Jonathan L. , Parish David I. , Endelman Jeffrey B. 
Published: October 2015

ABSTRACTProcessed potato (Solanum tuberosum L.) products, such as chips and French fries, contribute to the dietary intake of acrylamide, a suspected human carcinogen. One of the most promising approaches for reducing its consumption is to develop and commercialize new potato varieties with low acrylamide‐forming potential. To facilitate this effort, a National Fry Processing Trial (NFPT) was conducted from 2011 to 2013 in five states. More than 140 advanced breeding lines were evaluated for tuber agronomic traits and biochemical properties from harvest through 8 mo of storage. Thirty‐eight and 29 entries had significantly less acrylamide in French fries than standard varieties Russet Burbank and Ranger Russet, with reductions in excess of 50%, after one and 8 mo of storage, respectively. As in previous studies, the glucose content of raw tubers was predictive of acrylamide in finished French fries (R2 = 0.64–0.77). Despite its role in acrylamide formation, tuber free asparagine was not significant, potentially because it showed relatively little variation in the NFPT population. Even when glucose was included in the model as a covariate, genotype was highly significant (p = 0.001) for predicting acrylamide, indicating there may be yet‐unidentified genetic loci to target in breeding. The NFPT has demonstrated that there exist many elite US breeding lines with low acrylamide‐forming potential. Our ongoing challenge is to combine this trait with complex quality attributes required by the fry processing industry.
Prevalence and Timing of Screening and Diagnostic Testing for Gestational Diabetes Mellitus: A Population-Based Study in Alberta, Canada
Authors: Donovan Lois E. , Savu Anamaria , Edwards Alun L. , Johnson Jeffrey A. , Kaul Padma 
Published: October 2015

OBJECTIVE
The extent to which pregnant women are screened for gestational diabetes mellitus (GDM) at the population level is not known. We examined the rate, type, and timing of GDM screening and diagnostic testing in the province of Alberta, Canada. Geographic and temporal differences in screening rates, and maternal risk factors associated with lower likelihood of screening, were also determined.

RESEARCH DESIGN AND METHODS
Our retrospective linked-database cohort study included 86,842 primiparous women with deliveries between 1 October 2008 and 31 December 2012. Multivariable logistic regression analysis was used to examine maternal factors associated with lower likelihood of GDM screening.

RESULTS
Overall, 94% (n = 81,304) of women underwent some form of glycemic assessment in the 270 days prior to delivery. The majority (91%) received a 50-g glucose screen (GDS). Women not screened were younger and more likely to smoke and had lower maternal weight and median household income. When a diagnostic 75-g oral glucose tolerance test (OGTT) was indicated, it occurred a median of 10 (interquartile range 7, 15) days after the screen.

CONCLUSIONS
GDS occurred widely in a system where it was universally recommended and paid for publicly. When indicated, a 75-g OGTT was completed within 15 days in 75% of cases. Our finding that this two-step approach was widely implemented in a timely fashion supports continued endorsement of a two-step approach to screening and diagnosis of GDM. Further research is merited to assess whether the one-step GDM diagnostic approach results in different rates and timing of the 75-g OGTT and affects pregnancy outcomes.
Identifying Patients With Chronic Low Back Pain Who Respond Best to Mechanical Diagnosis and Therapy: Secondary Analysis of a Randomized Controlled Trial
Authors: Garcia Alessandra Narciso , Costa Luciola da Cunha Menezes , Hancock Mark , Costa Leonardo Oliveira Pena 
Published: October 2015

Background
“Mechanical Diagnosis and Therapy” (MDT) (also known as the McKenzie method), like other interventions for low back pain (LBP), has been found to have small effects for people with LBP. It is possible that a group of patients respond best to MDT and have larger effects. Identification of patients who respond best to MDT compared with other interventions would be an important finding.

Objective
The purpose of the study was to investigate whether baseline characteristics of patients with chronic LBP, already classified as derangement syndrome, can identify those who respond better to MDT compared with Back School.

Methods
This study was a secondary analysis of data from a previous trial comparing MDT with Back School in 148 patients with chronic LBP. Only patients classified at baseline assessment as being in the directional preference group (n=140) were included. The effect modifiers tested were: clear centralization versus directional preference only, baseline pain location, baseline pain intensity, and age. The primary outcome measures for this study were pain intensity and disability at the end of treatment (1 month). Treatment effect modification was evaluated by assessing the group versus predictor interaction terms from linear regression models. Interactions ≥1.0 for pain and ≥3 for disability were considered clinically important.

Results
Being older met our criteria for being a potentially important effect modifier; however, the effect occurred in the opposite direction to our hypothesis. Older people had 1.27 points more benefit in pain reduction from MDT (compared with Back School) than younger participants after 1 month of treatment.

Limitations
The sample (n=140) was powered to detect the main effects of treatment but not to detect the interactions of the potential treatment effect modifiers.

Conclusions
The results of the study suggest older age may be an important factor that can be considered as a treatment effect modifier for patients with chronic LBP receiving MDT. As the main trial was not powered for the investigation of subgroups, the results of this secondary analysis have to be interpreted cautiously, and replication is needed.
Order in the Lake: Managing the Sustainability of the Lake Constance Fisheries, 1350-1900
Authors: Zeheter Michael 
Published: October 2015

Abstract
Around 1350 the authorities of the Lake Constance region began to regulate the local fisheries by issuing fishermen's ordinances and signing fisheries treaties with other principalities with the stated interest of protecting the fish stocks, which were considered a commons. The fishermen and their guilds were heavily involved in this process, since some of their practices - like the destruction of spawn and the catching of young fish - could have devastating consequences. The fishermen and their authorites decided regularly for more than four centuries to prioritise the long-term preservation of the fish stocks and not short-term profits to be made on the local fish markets. Thus, they avoided the disastrous outcome of a 'Tragedy of the Commons'.
Microparticles from apoptotic RAW 264.7 macrophage cells carry tumour necrosis factor‐α functionally active on cardiomyocytes from adult mice
Authors: Milbank Edward , Soleti Raffaella , Martinez Emilie , Lahouel Badreddine , Hilairet Grégory , Martinez M. Carmen , Andriantsitohaina Ramaroson , Noireaud Jacques 
Published: October 2015

After ischaemic injury and in patients with atherosclerosis, the pool of inflammatory macrophages is enlarged in the heart and in atherosclerotic plaques. Monocyte/macrophage‐derived microparticles (MPs) are part of the pathological process of unstable atherosclerotic plaques. The present study focused on effects of MPs, produced by apoptotic murine RAW 264.7 macrophage cell line, in adult murine cardiomyocytes. Flow cytometry and western blot analysis showed that these MPs contained the soluble form of tumour necrosis factor alpha (TNF‐α). Cardiomyocyte sarcomere shortening amplitudes and kinetics were reduced within 5 min of exposure to these MPs. Conversely, Ca2+ transient amplitude and kinetics were not modified. The contractile effects of MPs were completely prevented after pretreatment with nitric oxide synthase, guanylate cyclase or TNF‐α inhibitors as well as blocking TNF‐α receptor 1 with neutralizing antibody. Microscopy showed that, after 1 h, MPs were clearly surrounding rod‐shaped cardiomyocytes, and after 2 h they were internalized into cardiomyocytes undergoing apoptosis. After 4 h of treatment with MPs, cardiomyocytes expressed increased caspase‐3, caspase‐8, Bax and cytochrome C. Thus, MPs from apoptotic macrophages induced a negative inotropic effect and slowing of both contraction and relaxation, similar to that observed in the presence of TNF‐α. The use of specific inhibitors strongly suggests that TNF‐α receptors and the guanylate cyclase/cGMP/PKG pathway were involved in the functional responses to these MPs and that the mitochondrial intrinsic pathway was implicated in their proapoptotic effects. These data suggest that MPs issued from activated macrophages carrying TNF‐α could contribute to propagation of inflammatory signals leading to myocardial infarction.