Minimization of Negative Impact of Well Cementing on Productive Horizons by Utilization of Swellable Packers

2021 ◽  
Author(s):  
Mykhaylo Paduchak ◽  
Viktor Dudzych ◽  
Anatolii Boiko
Keyword(s):  
Negative Impact ◽  
Differential Pressure ◽  
High Rate ◽  
Donets Basin ◽  
Technical Solution ◽  
Negative Consequences ◽  
Well Completion ◽  
Stable Production ◽  
Geological Conditions ◽  
Gas Tight

Abstract Avoiding of negative impact of slurry contact with productive sections by utilization of swellable pakers well completion systems as a key solution for depleted reservoirs. Results are compared to previously used classic well completion method with production casing cementing The new method of the well completion is based on a long period and many wells operations within Svyrydivske field in Dnipro-Donets Basin (here and after DDB). Precise selection of hybrid, oil and water based elastomers and correct placement in the appropriate hole zones for water and sectional isolation together with oil based mud utilization during drilling have provided stable production in depleted reservoirs and have minimized negative consequences from water filtration. The results achieved and the well completion method are described in detail to allow readers to replicate all results in a comparable geological conditions in DDB. Current well completion method has a couple of outstanding results achieved: –well integrity barrier is based on sufficient differential pressure provided by swellable packers;–reliable long term water isolation of all detected water contained intervals;–the production sections are not polluted by slurry filtrated water;–increased production rate comparing to cemented wells;–no risks of slurry loss during well cementing. This technology has been successfully implemented in both vertical and deviated wells on 4.5″ (114.3 mm) casing OD, in the interval 5100-5450 meters, bottom hole temperature 120-135°C. The differential pressure provided by swellable packer is up to 10,000 PSI (68.9 MPa). Fluid reactive packers are ready to expand and isolate highly cavernous hole sections and keep differential pressure sustainably. To achieve the best results with this well completion method, it is also important to use reliable gas tight casing connections and know precise reservoir characteristics. That is why the technology is recommended to be customized for well known brownfield reservoirs with high rate of depletion. The main benefit of the well completion method is a proved and safe technical solution for mainly depleted deep gas and condensate deposits in DDB (Ukraine) with sensitive economics

Efficiency of formation and functioning of the symbiotic soybean system with glyphosate treatment

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
I. Gumeniuk ◽  
◽  
A. Levishko ◽  
O. Demyanyuk ◽  
◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
Negative Impact ◽  
Direct Action ◽  
High Rate ◽  
Negative Consequences ◽  
Symbiotic System ◽  
Nitrogen Fixation Activity ◽  
Fixation Activity ◽  
Late Treatment ◽  
Soybean Plants

The efficiency of the formation and functioning of the soybean symbiotic system during the crops treatment with glyphosate and pre-sowing seed inoculation with different strains of Bradyrhizobium in the field studied. It is known, that glyphosate can affect symbiotic nitrogen fixation through direct action on rhizobia and symbiotic formations, we took plant samples for analysis after four weeks of glyphosate treatment and determined the aboveground mass of plants and symbiotic apparatus formation evaluated by the number of nodules, their mass and nitrogen fixation activity. It was shown that the late treatment (35 days after sowing) with glyphosate does not provide a sufficient level of weed control and under such conditions inhibits the development and growth of soybean plants, reduces the growth of aboveground and root mass. Treatment of plants with glyphosate before the formation of symbiotic apparatus (21 days after sowing) reduces nitrogen fixation activity by 3550%, but it does not have a significant effect on the formation of soybean yield. The obtained results confirmed the hypothesis of intensification of the nitrogen complex during late treatment of plants with glyphosate in plants inoculated with Bradyrhizobium japonicum strain EL-35 and the composition of strains of B. japonicum EM-24 and B. japonicum EL-35. The most effective for inoculation of soybean plants was a mixture of the studied strains of B. japonicum EM-24 and B. japonicum EL-35, which provides high nitrogen fixation activity and productivity. Therefore, to reduce the negative impact of glyphosate on the nitrogen fixation activity of symbiotic systems and to obtain high soybean productivity, it is necessary to select rhizobia strains with a high rate of symbiotic system formation, because even a slight decrease in nitrogen fixation can have long-term negative consequences.

scholarly journals Analysis of the influence of asymmetric geological conditions on stability of high arch dam

2021 ◽  
Vol 28 (1) ◽  
pp. 426-436
Author(s):  
Zelin Ding ◽  
Xuanyi Zhu ◽  
Hongyang Zhang ◽  
Hanlin Ban ◽  
Yuan Chen
Keyword(s):  
Safety Factor ◽  
Negative Impact ◽  
Decisive Role ◽  
Arch Dam ◽  
Test Method ◽  
Stable Operation ◽  
High Arch Dam ◽  
Reinforcement Scheme ◽  
Structural Plane ◽  
Geological Conditions

Abstract Geological conditions play a decisive role in the stability of arch dam engineering, and the asymmetric geological conditions of the abutment have a very negative impact on the safety of the arch dam. This article takes Lizhou arch dam as the research object, and determines that the arch dam is preliminarily affected by the geological asymmetric characteristics. Through the geomechanical model test method, the overload failure test of the Lizhou arch dam was carried out, and the resistance body, the instability deformation of the structural plane of the two dam abutments, and the influence of each structural plane on the dam body are obtained, and the safety factor is determined. According to the test results under the condition of asymmetric foundation of arch dam, for the structural plane which affects the geological asymmetry of the arch dam, the corresponding reinforcement measures are carried out. The feasibility of the reinforcement scheme is verified by the finite element method, and the safety factor after reinforcement is obtained. According to the results, it is suggested that some engineering measures can be taken to reduce the geological asymmetry between the two banks and ensure the safe and stable operation of the arch dam in the future.

scholarly journals The Impact of COVID-19 on Surgical Training: the Past, the Present and the Future

2021 ◽  
Author(s):  
Marina Yiasemidou
Keyword(s):  
Infection Control ◽  
Surgical Training ◽  
New Technologies ◽  
Negative Impact ◽  
Elective Surgery ◽  
Control Measures ◽  
Negative Consequences ◽  
Surgical Services ◽  
The World ◽  
The Impact

AbstractThe COVID-19 pandemic and infection control measures had an unavoidable impact on surgical services. During the first wave of the pandemic, elective surgery, endoscopy, and ‘face-to-face’ clinics were discontinued after recommendations from professional bodies. In addition, training courses, examinations, conferences, and training rotations were postponed or cancelled. Inadvertently, infection control and prevention measures, both within and outside hospitals, have caused a significant negative impact on training. At the same time, they have given space to new technologies, like telemedicine and platforms for webinars, to blossom. While the recovery phase is well underway in some parts of the world, most surgical services are not operating at full capacity. Unfortunately, some countries are still battling a second or third wave of the pandemic with severely negative consequences on surgical services. Several studies have looked into the impact of COVID-19 on surgical training. Here, an objective overview of studies from different parts of the world is presented. Also, evidence-based solutions are suggested for future surgical training interventions.

scholarly journals Short report: Autistic parents’ views and experiences of talking about autism with their autistic children

Autism ◽  
2021 ◽  
pp. 136236132098131
Author(s):  
Laura Crane ◽  
Lok Man Lui ◽  
Jade Davies ◽  
Elizabeth Pellicano
Keyword(s):  
Lived Experience ◽  
Online Survey ◽  
Negative Impact ◽  
Professional Support ◽  
Short Report ◽  
Negative Consequences ◽  
Autistic Children ◽  
Personal Experiences ◽  
Current Sample ◽  
Experiential Expertise

Little is known about how parents talk about autism with their autistic children, particularly among families in which both a parent and child are autistic. Using an online survey, we gathered quantitative and qualitative data from 34 autistic parents (most of whom had told their children about their diagnosis) to address this knowledge gap. There was considerable overlap between the views and experiences of the autistic parents in this study and the largely non-autistic parent samples in previous research. Specifically, parents emphasised the importance of being open and honest about the diagnosis, disclosing the diagnosis as early as possible, individualising discussions to children’s needs and framing the diagnosis positively. There were, however, areas in which the views and experiences of the current sample differed from previous research on non-autistic samples. First, our sample of autistic parents outlined the benefits of their own experiential expertise, which they felt resulted in heightened understanding and empathy with their children. Second, our sample tended not to express concerns about disclosure potentially having a negative impact. Finally, our participants did not express a want or need for professional support with disclosure. Instead, they reported feeling well equipped to support their children using their own knowledge and lived experience. Lay abstract Previous research examining how parents talk about autism with their children has tended to focus on parents who are not autistic themselves. We collected information on this topic from 34 autistic parents of autistic children (most of whom had told their children about their diagnosis). We found similarities, but also differences, between the views and experiences of autistic parents in this research and those reported in previous research (in studies of largely non-autistic parents). Similarities include the following: it is important to be open and honest about the diagnosis; the diagnosis should be introduced/discussed as early as possible; discussions should be tailored to each individual child’s needs; and we should not overlook the challenges associated with autism, but it is important to focus on positive aspects too. Differences include the following: autistic parents used personal experiences in conversations about autism, which was felt to result in increased understanding and empathy with their children; autistic parents overwhelmingly focused on more positive aspects of an autism diagnosis; our sample did not express concerns that discussions could have negative consequences too (e.g. making children more anxious); and autistic parents did not want or need professional support to talk about autism with their children (instead, they felt confident in using their own knowledge/experiences to guide discussions).

scholarly journals Power Imbalance and the Dark Side of the Captive Agri-food Supplier–Buyer Relationship

2021 ◽  
Author(s):  
Richard Glavee-Geo ◽  
Per Engelseth ◽  
Arnt Buvik
Keyword(s):  
Financial Performance ◽  
Negative Impact ◽  
Positive Impact ◽  
Dark Side ◽  
Curvilinear Relationship ◽  
Power Imbalance ◽  
Negative Consequences ◽  
Key Informants ◽  
Economic Satisfaction

AbstractThis paper highlights the dark side of power imbalance regarding its consequences in agri-food supplier–buyer relationships. We report on findings from two studies. The first study is based on a sample of 105 key informants, while study 2 is based on a sample of 444 key informants, all from the cocoa agri-food supply market of Ghana. While the first study focuses on the antecedents of power imbalance and its consequences, the second study explores the role of cooperatives/collective action in minimizing supplier exploitation. Data from these studies were analysed using the partial least squares technique (SmartPLS). Analysis of these findings shows switching costs’ impact on power imbalance to be curvilinear, while power imbalance has a curvilinear relationship with opportunism. The negative consequences of power imbalance are further exacerbated by dependency and the lack of joint action. Furthermore, we found the negative impact of power imbalance on financial performance to be stronger for non-cooperative members than for cooperative members, while, counterintuitively, we found the positive impact of economic satisfaction on financial performance to be stronger for non-cooperative members than for cooperative members.

Analysis of the state of the migration process of the ukrainian population in the context of domestic and international levels

2021 ◽  
Vol 72 (5) ◽  
pp. 110-118
Author(s):  
M. Shkurat ◽  
K. Pavlotska
Keyword(s):  
Social Protection ◽  
Negative Impact ◽  
Migration Policy ◽  
Cash Flows ◽  
The State ◽  
Negative Consequences ◽  
Migration Process ◽  
State Of The Economy ◽  
Migration Flows ◽  
High Level

Analysis of the migration process of the Ukrainian population, which takes place within the state and at the international level during 2014–2019 is carried out in this paper. On the basis of scientific works of domestic scientists and institutes the problems which have not been investigated, and also aspects which have been solved partially are defined. The negative consequences of the Ukrainian migration process on the state of the country are identified. The classification of migration flows of the Ukrainian population according to the reasons of movement is carried out. The main regions and countries which, as of the beginning of 2021, are more attractive to compatriots and are characterized by significant influxes of Ukrainians are identified. The main centers of departure – regions and countries – which are characterized by high level of outflow of Ukrainians are determined, the main problems and reasons that motivate the outflow of Ukrainians are highlighted in this paper. The level of growth of the Ukrainian population in terms of migration flows is defined. The investigation of Ukrainian diasporas, territorial location and analysis of their share in comparison is carried out. The main factors that force the Ukrainian population to move, which affects the demographic situation in Ukraine, the level of employment, as well as the amount of cash flows to the country and the state of the economy as a whole are identified. The main regulations and identified solutions to the migration flows of the domestic population, which were approved and implemented in the period from 2001 to 2019 are compared in this paper. On the basis of current and newly introduced strategies, critical analysis of the ways of regulating the migration process of the Ukrainian population is carried out, the main aspects and problems of the implemented migration policy of Ukraine are determined. The results of the work are to identify the main ways to reduce the negative impact of the migration process on the country's economy and related processes, and strategies to benefit from the movement of citizens of Ukraine, namely: introduction of intellectual security, revision of wages by region, stimulating the process of attracting technology in all spheres of activity and formation of the social protection system.

“De terughaalactie geld alleen voor de hierboven afgebelede pizza’s geldig.”

2015 ◽  
Vol 43 (3) ◽  
Author(s):  
Mariet Raedts ◽  
Irene Roozen
Keyword(s):  
Negative Impact ◽  
Purchase Intentions ◽  
The Other ◽  
Product Recalls ◽  
Negative Consequences ◽  
Product Recall ◽  
Brand Evaluations ◽  
Different Types

Consumers’ responses to product recalls with language errors Consumers’ responses to product recalls with language errors Product recall notices not only warn consumers for faulty products, they also limit the damage which may be caused to the company. But what happens when the product recall notice itself contains errors? This study investigated the effects of three different types of language errors: typographical errors, verb errors and sentence errors. Four versions of a product recall were created. The control condition contained no errors. The other three versions contained either five typos, five grammatical conjugation errors or five poorly formed sentences. Participants (N = 710) were randomly assigned to one of the four conditions. Results indicate that participants who detected the errors, had lower attitudes towards the advertisement and the company than participants in the control condition and participants who failed to detect the errors. Poorly formed sentences also had a negative impact on consumers’ brand evaluations and their future product purchase intentions. Hence, language errors in product recall notices can have negative consequences for companies.

scholarly journals PSYCHOLOGICAL STATES AND PROPERTIES OF THE PERSONALITY HAVING DEPENDENCE ON THE SMARTPHONE

2021 ◽  
pp. 225-235
Author(s):  
Виктор Павлович Шейнов ◽  
Наталья Васильевна Дятчик
Keyword(s):  
College Students ◽  
Communicative Competence ◽  
Negative Impact ◽  
Self Regulation ◽  
Female Gender ◽  
Self Control ◽  
Smartphone Addiction ◽  
Poor Sleep ◽  
Negative Consequences ◽  
Educational Work

Зависимость от смартфона стала распространенным явлением, особенно в молодежной среде. В предыдущих исследованиях установлены большая распространенность данной зависимости и то, что жертвы этой зависимости испытывают страдания от плохого качества сна (а то и от бессонницы), депрессии, тревожности, стресса, а также отрицательные эмоции, характеризуются значительным снижением физической активности. Распространенность зависимости от смартфона и ее отрицательные последствия диктуют необходимость ее всестороннего исследования. Изучаются проявления феномена зависимости от смартфонов у учащихся медицинского колледжа. Установлено, что зависимость от смартфона положительно связана с одиночеством, агрессивностью, плохим настроением и отрицательно – с коммуникативной компетентностью, настойчивостью, самообладанием, саморегуляцией, а также с возрастом. В большей степени она проявляется у представителей женского пола. Выявленные корреляции зависимости от смартфонов с одиночеством, агрессивностью, саморегуляцией, коммуникативной компетентностью в целом соответствуют характеру корреляций, установленных в зарубежных исследованиях. Новыми как для отечественных, так и для зарубежных исследований являются установленные авторами отрицательные связи зависимости от смартфона респондентов с настойчивостью и самообладанием. Smartphone addiction has become common, especially among young people. Previous studies have established a high prevalence of this addiction and the fact that the victims of this addiction experience suffering: from poor sleep quality (and even insomnia), depression, anxiety, stress, experience negative emotions, and are also characterized by a significant decrease in physical activity. The prevalence of smartphone addiction and its negative consequences dictate the need for a comprehensive study. The article examines the manifestations of the phenomenon of smartphone addiction in medical college students. It is shown that the psychological mechanism of the emergence of addictions is described by a general model of psychological impact. It was found that that smartphone addiction is positively associated with loneliness, aggressiveness, bad mood, with the female gender, and negatively – with communicative competence, persistence, self-control, self-regulation, as well as with age. The connections identified in the article with loneliness, aggressiveness, self-regulation, and communicative competence generally correspond to the nature of the correlations established in foreign studies. New for both domestic and foreign studies are the negative links of dependence on smartphones with persistence and self-control revealed in the article. Based on the results of this study, recommendations were developed (based on the obtained empirical data) for college students to minimize the negative impact of smartphones on their mental and physical health. It is recommended in the process of educational work with students to explain the negative consequences of dependence on smartphones and the value of direct, live communication with their environment.

scholarly journals Verbal abuse facing Saudi nurses during internship program

2021 ◽  
Vol 12 (3) ◽  
pp. 75
Author(s):  
Maram Banakhar ◽  
Maha Alzahrani ◽  
Amani Omar Essa ◽  
Asal Fathi Al-dhahry ◽  
Rahma Farooq Batwa ◽  
...  
Keyword(s):  
Workplace Violence ◽  
Negative Impact ◽  
Care Delivery ◽  
Cross Sectional Study ◽  
Verbal Abuse ◽  
Negative Consequences ◽  
Online Questionnaire ◽  
Cross Sectional ◽  
Staff Members ◽  
Night Shifts

Background: Verbal abuse, in the context of workplace violence, is increasing, with nurses at high liability of being subjected to it since they are the first line of care delivery. This phenomenon is now receiving greater recognition due to its negative impact on nurses. This study aims to assess the prevalence of verbal abuse faced by Saudi nursing intern students in Jeddah, Saudi Arabia.Methods: A cross-sectional study was conducted via a modified online questionnaire completed by Saudi intern nurses in Jeddah in March 2020. Descriptive statistical analysis was executed using statistical software SPSS Version 21.Results: From a total of 132 nurses, 94 participants met the study criteria. The findings show that 39.4% of Saudi intern nurses have experienced verbal abuse. The common perpetrators are patient/client (73%) and other staff members (73%), followed by patients’ relatives (45.9%). 48.6% of the participants did not report incidences of verbal abuse, commonly citing fear of the negative consequences (51.4%) and not knowing who to report it to (45.9%). A significant relation between working night shifts (6 pm to 7 am) and being verbally abused was found.Conclusions: Saudi nursing interns are vulnerable to verbal abuse. This study’s results highlight the possible risk to nursing interns, which may be diminished by modifying perceptions of verbal abuse and by clarifying the rules and regulations for both nursing interns and suspected perpetrators. We recommend future studies of verbal abuse are conducted in larger groups of nurses across different provinces in Saudi Arabia.

scholarly journals Reducing Red Tape’s Negative Consequences for Leaders: The Buffering Role of Autonomous Motivation

2022 ◽  
Vol 12 ◽  
Author(s):  
Jolien Muylaert ◽  
Robin Bauwens ◽  
Mieke Audenaert ◽  
Adelien Decramer
Keyword(s):  
Job Satisfaction ◽  
Negative Impact ◽  
Autonomous Motivation ◽  
Underlying Mechanism ◽  
Negative Consequences ◽  
Healthcare Organizations ◽  
Protection Mechanism ◽  
Mediating Role ◽  
Red Tape

In a context where the amount of red tape in healthcare organizations continues to rise, head nurses’ job satisfaction is constantly under pressure. By building on the Job Demands-Resources model, we developed a theoretical model investigating the relationship between red tape and job satisfaction. By investigating the mediating role of discretionary room and the moderating role of autonomous motivation in this relationship, this study does not only aim to provide additional knowledge regarding the underlying mechanisms in this relationship, but also to increase our understanding of how this suffering at work can be mitigated. Our conditional process analyses (N = 277 head nurses) indicate that red tape undermines head nurses’ job satisfaction and that discretionary room acts as an underlying mechanism in this process. By revealing the mediating role of discretionary room, this study advances our understanding of the risks originating from red tape for leaders. Furthermore, our findings also indicate that autonomous motivation mitigates the negative relation between red tape and discretionary room and between red tape and job satisfaction. As autonomous motivation turns out to be an important protection mechanism against the negative consequences of red tape, organizations should put extra effort into stimulating the autonomous motivation of their leaders. When organizations make sure that their leaders’ job designs and work environments meet the need for autonomy, competence, and relatedness, leaders will become more autonomously motivated, which will buffer the negative impact of red tape.

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