A Potential Approach for Paraffin Control for Wells in South West Trinidad Oilfields Using Wax Inhibitors and Paraffin Solvent

2021 ◽  
Author(s):  
Joel George King ◽  
Kyethann S. Francis-Lacroix ◽  
Chenelle Orosco
Keyword(s):  
Total Production ◽  
Wax Deposition ◽  
Production Flow ◽  
Subsequent Formation ◽  
South West ◽  
Temperature Loss ◽  
Well Data ◽  
Wax Crystallization ◽  
The Impact ◽  
Flow Blockage

Abstract Paraffin deposition in production tubing and flow lines is a phenomenon that affects many oil producers. Once paraffin wax has precipitated there is a tendency to agglomerate peripherally to the production flow path which eventually leads to a sectional decrease in tubing or, even, flow blockage across production zones. The impact of paraffin deposition ranges from wellbore issues, flow assurance challenges to total production impairment. In many mature fields, paraffin remediation can be challenging when deposition occurs in the formation especially in near-wellbore regions of producing wells. Temperature loss at these locations induces wax crystallization and subsequent formation damage. A mitigative approach to paraffin deposition in these areas can typically include the utilization of both paraffin inhibitors and paraffin solvents individually or in combination. However, as it pertains to paraffin remediation downhole, inhibitor placement in the formation or at near-wellbore has proven to be very challenging. This paper reviews the performance of two main chemical applications applied to address downhole wax deposition in a well from a South West Trinidad oilfield. The paper also discusses the strategy behind identifying the chemical type for the application and considerations for the placement of the chemical treatment to impact its intended target based on well data and well infrastructure.

scholarly journals Trends in incidence of pneumococcal disease before introduction of conjugate vaccine: South West England, 1996–2005

2007 ◽  
Vol 136 (8) ◽  
pp. 1096-1102 ◽  
Author(s):  
C. A. IHEKWEAZU ◽  
D. A. B. DANCE ◽  
R. PEBODY ◽  
R. C. GEORGE ◽  
M. D. SMITH ◽  
...  
Keyword(s):  
Blood Culture ◽  
Pneumococcal Disease ◽  
Annual Incidence ◽  
Protection Agency ◽  
South West ◽  
The Mean ◽  
The Impact ◽  
Susceptibility And Resistance ◽  
South West England ◽  
Immunization Programmes

SUMMARYIntroduction of pneumococcal conjugate and polysaccharide vaccines into the United Kingdom's routine immunization programmes is expected to change the epidemiology of invasive pneumococcal disease (IPD). We have documented the epidemiology of IPD in an English region (South West) with high-quality surveillance data before these programmes were established. We analysed data on isolates of Streptococcus pneumoniae from blood and CSF between 1996 and 2005 from microbiology laboratories in the South West that were reported and/or referred for serotyping to the Health Protection Agency Centre for Infections. The mean annual incidence of IPD increased from 11·2/100 000 in 1996 to 13·6/100 000 in 2005 (P<0·04). After adjusting for annual blood-culture sampling rates in hospitals serving the same catchment populations, an increase in annual incidence of IPD was no longer observed (P=1·0). Variation in overall incidence between laboratories could also be explained by variation in blood culture rates. The proportion of disease caused by serotypes 6B, 9V and 14 decreased significantly (P=0·001, P=0·007, and P=0·027 respectively) whereas that caused by serotype 4, 7F and 1 increased (P=0·001, P=0·003, and P<0·001 respectively) between 2000 and 2005. The level of penicillin non-susceptibility and resistance to erythromycin remained stable (2% and 12% respectively). This study provides an important baseline to assess the impact of changing vaccination programmes on the epidemiology of IPD, thus informing future use of pneumococcal vaccines.

Cumulative reproductive performance effect on overall lifetime productivity in Merino sheep

2018 ◽  
Vol 58 (8) ◽  
pp. 1470
Author(s):  
J. S. Richards ◽  
M. A. Sladek ◽  
G. J. Lee
Keyword(s):  
Reproductive Performance ◽  
New South ◽  
Dental Health ◽  
Age Groups ◽  
The South ◽  
Performance Effect ◽  
South West ◽  
South Wales ◽  
The Impact ◽  
Effect Of Age

Reproduction is an important driver of profitability in commercial sheep flocks. Historically, Merino flocks have been run with a fixed age structure, ignoring individual merit and casting for age at a specific age. More recently, research has focussed on utilising the variation within age groups by keeping productive older ewes longer and culling less productive ewes earlier. Previous studies have also examined the effect of age on reproduction and the impact of reproduction status on productivity, but little research has been conducted on cumulative effects of reproductive performance on later productivity, reproduction and health. The present study examined the impact of higher lifetime reproduction on other key production and fitness traits in older ewes run under commercial conditions. Data were collected from two commercial wool-producing properties in the South West Slopes and the Central West Plains of New South Wales during 2009–2011. Reproduction, fleece measurements, bodyweight and condition and dental health were recorded during the study. The results showed that age had a bigger effect on productivity and dental health than did cumulative lifetime reproduction. Environment and genetics determined the level of impact, with minimal loss in productivity from increased age of animals occurring in the South West Slopes flock, whereas the Central West Plains flock would appear to require closer monitoring of productivity as ewes aged. The data collected did not allow separation of the genetic and environmental influences within the study. Retaining animals with a higher reproductive performance past normal culling age does not necessarily result in reduction of productivity or ewe health, but this must be monitored.

scholarly journals Effective budgeting as a priority of the company›s development

2021 ◽  
Vol 16 (2) ◽  
pp. 46-53
Author(s):  
S. B. Kashkimbayev ◽  
A. N. Zhakupov
Keyword(s):  
Modern World ◽  
Budget Process ◽  
Budget Management ◽  
Subsequent Formation ◽  
Financial Condition ◽  
Analysis And Synthesis ◽  
Fierce Competition ◽  
The Right ◽  
Methodological Aspects ◽  
The Impact

In the modern world, in the conditions of economic instability and fierce competition, companies need to have effective tools that can provide an opportunity to study the current financial condition, compare cash inflows and outflows, approve the right decisions that contribute to the subsequent formation and development of the enterprise, as well as optimize management costs. In a company, such an important tool for financial planning, as well as control, is budgeting.This article discusses the tasks, goals, methods, disadvantages and advantages of budgeting, illustrates the full continuous cycle of budget management and the stages of development of the concept of budgeting. In addition to the theoretical aspects, the article considers the empirical and methodological aspects. The purpose of this article is to generalize the theoretical provisions and develop the organizational and methodological aspects of the application of budgeting and the impact of effective budgeting on the development of the overall company. The article uses complex and systematic approaches to the processes and phenomena under study, which is achieved through the methods of analysis and synthesis, review and collection of information, statistical analysis, scientific abstraction and visualization.In the conclusion of the article, the conclusions are made, that a properly formed concept of budgeting, improvement of methods and elements of the budget process will make it possible to manage the capital, as well as a single commercial, and the company as a whole, establishing the sequence of business types, terms and trends of restructuring. This will allow the owners of companies to adapt their business in time to all possible changes in market conditions.

scholarly journals Risk of Plasmodium falciparum infection in south-west Burkina Faso - potential impact of expanding eligibility for seasonal malaria chemoprevention

2021 ◽  
Author(s):  
Anne L Wilson ◽  
Steve W Lindsay ◽  
Alfred Tiono ◽  
Jean Baptiste Yaro ◽  
Hilary Ranson ◽  
...  
Keyword(s):  
Risk Factors ◽  
Plasmodium Falciparum ◽  
Burkina Faso ◽  
Malaria Transmission ◽  
Malaria Control ◽  
Control Measures ◽  
Sub Saharan Africa ◽  
South West ◽  
Seasonal Malaria Chemoprevention ◽  
The Impact

Abstract Background Burkina Faso has one of the highest malaria burdens in sub-Saharan Africa despite the mass deployment of insecticide-treated nets (ITNs) and use of seasonal malaria chemoprevention (SMC) in children aged up to 5 years. Identification of risk factors for Plasmodium falciparum infection in rural Burkina Faso could help to identify and target malaria control measures. Methods A cross-sectional survey of 1,199 children and adults was conducted during the peak malaria transmission season in south-west Burkina Faso in 2017. Logistic regression was used to identify risk factors for microscopically confirmed P. falciparum infection. A malaria transmission dynamic model was used to determine the impact on malaria cases averted of administering SMC to children aged 5–15 year old. Results P. falciparum prevalence was 32.8% in the study population. Children aged 5 to < 10 years old were at 3.74 times the odds (95% CI = 2.68–5.22, p < 0.001) and children aged 10 to 15 years old at 3.14 times the odds (95% CI = 1.20–8.21, p = 0.02) of P. falciparum infection compared to children aged less than 5 years old. Administration of SMC to children aged up to 10 years is predicted to avert an additional 57 malaria cases per 1000 population per year (9.4% reduction) and administration to children aged up to 15 years would avert an additional 89 malaria cases per 1000 population per year (14.6% reduction) in the Cascades Region, assuming coverage of pyrethroid-piperonyl butoxide ITNs. Conclusion Malaria infections were high in all age strata, although highest in children aged 5 to 15 years, despite roll out of core malaria control interventions. Given the burden of infection in school-age children, extension of the eligibility criteria for SMC could help reduce the burden of malaria in Burkina Faso and other countries in the region.

scholarly journals The fast-track outpatient clinic significantly decreases hospitalisation rates among polymyalgia rheumatica patients

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Stavros Chrysidis ◽  
Philip Rask Lage-Hansen ◽  
Nikoletta Svendsen ◽  
Andreas P. Diamantopoulos
Keyword(s):  
Polymyalgia Rheumatica ◽  
Fast Track ◽  
Clinical Symptoms ◽  
Classification Criteria ◽  
Duration Of Symptoms ◽  
Prednisolone Dose ◽  
South West ◽  
Hospitalised Patients ◽  
Number Of Patients ◽  
The Impact

Abstract Objectives This study aimed to investigate the hospitalisation rates and the reasons for hospitalisation in patients with polymyalgia rheumatica (PMR). Furthermore, it aimed to clarify the impact of a newly established Fast Track Clinic (FTC) approach on hospitalisation rates in connection with PMR diagnosis. Methods Patients diagnosed with PMR at South-West Jutland Hospital, Denmark, between 2013 and 2018 were included retrospectively. Only patients fulfilling the 2012 EULAR/ACR classification criteria were included in our cohort. An FTC for patients suspected of having PMR was established in the rheumatologic department of South-West Jutland Hospital in January 2018. Results Over 6 years (2013 to 2017), 254 patients were diagnosed with PMR, 56 of them while hospitalised. Hospitalised patients were more likely to have a higher initial CRP mean ± standard deviation (SD) 99.53 ± 59.36 vs 45.82 ± 36.96 mg/lt (p <  0.0001) and a shorter duration of symptoms (p = 0.0018). After implementing the FTC, a significant decrease in hospitalisation rates (from 20.4% to 3,5%) and inpatient days of care (mean ± SD 4.15 ± 3.1 vs 1 ± 0) were observed. No differences between the two groups were observed regarding clinical symptoms, laboratory values and initial prednisolone dose. Conclusion A substantial number of patients are hospitalised in connection with the PMR diagnosis. The FTC approach can decrease the hospitalisation rates significantly among these patients. Trial registration Retrospectively registered.

A Conceptual Framework for Evaluating Joint Venture Opportunities between Hospitals and Physicians

1989 ◽  
Vol 2 (3) ◽  
pp. 204-212 ◽  
Author(s):  
Carol K. Jacobson
Keyword(s):  
Conceptual Framework ◽  
Joint Venture ◽  
Transaction Cost Economics ◽  
Regulatory Environment ◽  
Strategic Decisions ◽  
Health Care Managers ◽  
Subsequent Formation ◽  
First Case ◽  
The Impact

A Conceptual Framework for Evaluating Joint Venture Opportunities Between Hospitals and Physicians This paper reviews the changes in the competitive and regulatory environment and examines the impact of those changes on the relationships between hospitals and physicians. Transaction cost economics (TCE) provides a conceptual framework for examining the emergence of closer linkages between hospitals and physicians than the traditional independent hospital and medical staff organisations. TCE predicts that as investments in support of transactions become more specialised, closer linkages are more efficient. To illustrate, two case studies of successful hospital-physician joint ventures are presented. The first case study describes a joint venture between hospitals and physicians to purchase durable medical equipment. The second case describes the breakdown of an informal arrangement and the subsequent formation of a joint venture to organise a clinical programme. The discussion reports the rationale for choosing these structural arrangements and their key features, pointing out how TCE would account for the decision to establish a joint venture. The conclusion discusses the implications of this argument for the strategic decisions of health care managers.

The Coarse Particle Influence on the Strength of Wax Deposition

2020 ◽  
Author(s):  
Xun Zhang ◽  
Qiyu Huang ◽  
Yu Zhang ◽  
Yaping Li ◽  
Xin Liu
Keyword(s):  
Yield Stress ◽  
Colloidal Particles ◽  
Critical Mass ◽  
Solid Particles ◽  
Coarse Particle ◽  
Silica Sand ◽  
Coarse Particles ◽  
Wax Deposition ◽  
Wax Deposits ◽  
The Impact

Abstract Wax deposition has always been an essential issue for flow assurance, especially in subsea pipelines. The coarse particles, which are usually measured in millimeters, will be carried out by oil flow during the deep-water oil fields production. However, due to insufficient understanding of the structure of wax deposits and the complexity of sandy crude oil deposition, the interaction between coarse particles and wax deposits in the pipeline have rarely been investigated. In this paper, the effect of coarse particles on the yield stress of wax deposits has been studied. The sample was mixed at reversible structure temperature so that the impact of shear history could be eliminated, and the rapid particle settlement at high temperature could be avoided. Experimental results have found that there is a critical fraction in coarse particle influences, below which a small number of coarse particles added will lead to a slight increase in bulk yield stress. On the contrary, a dramatic decrease in yield stress when exceeding the critical mass fraction and increasingly marked enhancement of yield stress as the fraction increases. This phenomenon has been explicated microscopically by the structural interaction between coarse particles and wax deposits. The interlock between wax crystals is the major contribution of the structure as the less particle fraction contains. Even though the silica sand is a typical non-colloidal particle, the asphaltene and resin could be absorbed on the surface of particles and forming a cluster of colloidal particles. As the fraction of particles slightly increased, the slip between colloidal particles and wax crystal interlock accelerates structural failure. Nevertheless, more particles involved the overall yield stress may depend on the friction and the adhesive force between solid particles. The subtle changes induced by coarse particles would have a harder deposit, which can hinder pig passing and affect pipeline pigging operations.

Assessment of the Impact of Wax Deposition in a Pre-Salt Project

2021 ◽  
Author(s):  
Nathalie Carvalho Pinheiro ◽  
Sergio Paulo Gomes Pinho
Keyword(s):  
Diffusion Coefficient ◽  
Wax Deposition ◽  
Full Field ◽  
Deposition Model ◽  
High Production ◽  
The One ◽  
Wax Deposits ◽  
Transient Models ◽  
The Impact ◽  
Production Losses

Abstract Despite pre-salt fields in Brazil usually having high production per well, one of the areas presents a reservoir with low permoporosity, which results in small flowrates with fluid temperatures during production below the one that is critical for wax deposition. The operations commonly used to remove the wax deposits are diesel soaking and pigging, which brings production losses and OPEX increase. Thus, the economic analysis should consider these events reducing the operational efficiency of production. To evaluate the production drop due to wax deposition, it was necessary to perform a loop test to determine the wax growth throughout time. With a multiphase simulator, it is possible to choose the deposition model and the diffusion coefficient that best fits the analyzed fluid. However, one of the limitations of this first analysis is the lack of data to determine the effect of the shear stripping, as the test is performed under a laminar flow. As this term plays an important role in wax growth, it was necessary to add to the simulation model the shear coefficient fitted from another pre-salt field. With this information, it will be possible to make a more reliable evaluation of the impact of wax deposition, increasing the confidence in the production curve, OPEX and NPV of the full field project. This paper shows the methodology that has been applied to evaluate the impact of wax deposition in pre-salt fields. It presents the deposition model, and its coefficients used to fit the multiphase transient models to a pre-salt field.

Impact of Innovation on the Entrepreneurial Success in Selected Business Enterprises in South-West Nigeria

2017 ◽  
Vol 8 (2) ◽  
pp. 29-38
Author(s):  
Olu Ojo
Keyword(s):  
Product Quality ◽  
Positive Relationship ◽  
Secondary Data ◽  
Corporate Image ◽  
Primary Data ◽  
Manufacturing Companies ◽  
Entrepreneurial Success ◽  
South West ◽  
Business Enterprises ◽  
The Impact

This study examined the impact of innovation on the entrepreneurial success in selected business enterprises in SOUTH-WEST Nigeria. The paper dwelt on the extent to which the selected enterprises innovation effort affects the quality of their product as well as the company image. Five manufacturing companies in the Food and Beverages line were selected using purposive sampling method because of their contributions to economic development of Nigeria while the respondents were selected through stratified random sampling technique. Survey research design was used in carrying out the study. Both primary and secondary data were used in the study. Primary data were collected through the administration of questionnaire while secondary data were garnered from Annual Report and Accounts of the companies. Data were analysed using descriptive and inferential statistics. Hypotheses were tested at 0.05 significant levels with the aid of parametric student t-test. The results revealed that there is a positive relationship between innovation and product quality as well as a positive relationship between innovation and good corporate image and that both of them significantly affect entrepreneurial success. The study recommends that business enterprises should engage more on innovation of their production process to improve their product quality and even enhances good corporate image. This will help them to sustain their position in the face of stiff competition.

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