Investigation of slug mitigation: self-lifting approach in a deepwater oil field

Slug flow is a flow assurance issue that staggers production and, in some cases, 'kills the flow' of the well. Severe slugging, a type of slugging which usually occurs at the base of the riser column, causes large amplitudes in the fluctuation of pressure within the riser column and consequently damages equipment placed topside. An adaptation of a novel concept to slug mitigation: the self-lifting model, is presented. This model presents variations to the internal diameter of the self-lift bypass to produce effective mitigation to severe slugging

Microbiological and chemical compositions of agbarati and ogiri Igbo, popular foods of south eastern Nigerians

The microbial and chemical compositions of two indigenous foods of South eastern Nigeria were investigated. The TAPC of ogiri Igbo ranged from 1.2 x 1010 to 2.4 x1011cfu/g, the coliform count was 2.8 x 102 to 7.0 x 106cfu/g, and fungal count was 1.0 x 108 to 3.3 x 1011cfu/g. Agbarati had a TAPC of 1.1 x 109 to 1.2 x 1011cfu/g, coliform count of 3.9 x 105 to 2.7 x 106cfu/g, and fungal count of 1.9 x 107 to 2.4 x 107cfu/g. Species of Bacillus, Streptococcus, Staphylococcus, Micrococcus, Geotrichum, Mucor, Rhizopus and Saccharomyces were prevalent in the samples. The chemical analysis of the food samples indicated the presence of saponin, tannin, alkaloid, flavonoid, oxalate and cyanide in varied amounts. The nutritional analysis revealed that agbarati and ogiri had moisture contents of 11.40 and 36.12%, Fat contents of 39.10 and 30.24 %, Fiber contents of 2.91 and 3.65%, Protein contents of 29.63 and 12.75%, Ash contents of 4.25 and 1.62% and Carbohydrate contents of 12.71 and 15.62, respectively. These traditional foods are good sources of nutrients however, their microbial loads above 106 tolerant limits and the presence of coliforms calls for concern, adequate hazard analysis and critical control point (HACCP) measure and effective good manufacturing practice (GMP) is imperative in the production of these local foods

STAFF MOTIVATION AND EFFECTIVE LIBRARY SERVICE DELIVERY IN FEDERAL UNIVERSITY OF TECHNOLOGY, OWERRI AND MICHAEL OPARA UNIVERSITY OF AGRICULTURE, UMUDIKE

This study examined staff motivation variables and effective library service delivery at the Federal University of Technology, Owerri (FUTO) and Machael Okpara University of Agriculture, Umudike (MOUAU). Three research questions and three hypotheses guided the study. A linear correlation design was adopted in this study. A census technique was employed to cover the entire population of one hundred and sixty-seven (167) library personnel. A rating scale captioned Staff Motivation and Effective service Delivery Rating Scale (SMESDRS) was used as an instrument for data collection. Data collected were analyzed using Pearson (r) statistics whereas the hypotheses were tested using t-test statistics of simple linear correlation. The findings showed that the delivery of effective services in the university libraries was significantly and positively influenced by a strong level of motivation in terms of providing opportunities for staff development, giving the staff promotion due to them and ensuring regular payment of salaries and wages among others. It was, however, recommended that university library staff with degrees in librarianship are immediately converted and promoted as this would serve as a morale booster and encourage hard work among them

3-D Seismic Interpretation and Volumetric Estimation of “Osaja Field” Niger Delta, Nigeria

3-D seismic interpretation and petrophysical analysis of the Osaja Field, Niger Delta, was carried out with aim of carrying out a detailed structural interpretation, reservoir characterization and volumetric estimation of the field. Four wells were correlated across the field to delineate the lithology and establish the continuity of reservoir sand as well as the general stratigraphy of the area. The petrophysical analysis carried out, revealed two sand units that are hydrocarbon bearing reservoirs (Sand_A and Sand_B).The spatial variation of the reservoirs were studied on a field wide scale using seismic interpretation. Time and depth structural maps generated were used to establish the structural architecture/geometry of the prospect area of the field. The depth structure map revealed NE-SW trending anticlinal structures with F5 and F6 as faults assisted closures to the reservoir. Furthermore, reservoir parameters such as net pay, water saturation porosity, net-to-gross etc, were derived from the integration of seismic and well log data. The structural interpretation on the 3-D seismic data of the study area revealed a total of seven faults ranging from synthetic to antithetic faults. The petrophysical analysis gave the porosity values of the reservoir Sand_A ranging from 18.1 - 20.3% and reservoir Sand_B ranging from 13.1-14.9% across the reservoir. The permeability values of reservoir Sand_A ranging from 63-540md and reservoir Sand_B ranging from 18-80md hence there is decrease in porosity and permeability of the field with depth.The net-to-gross varies from 22.1% to 22.4% in Rerservoir Sand A to between 5.34- 12% for Rerservoir Sand _A while Sw values for the reservoirs ranges from 38-42% in well 2 to about 68.79-96.06% in well 11. The result of original oil in place for all the wells calculated revealed that well 2 has the highest value with 9.3mmbls. These results indicate that the reservoirs under consideration have a poor to fair hydrocarbon (oil) prospect

Effects of Household Waste Generation, Disposal and Management on Farmers’ Health in Owerri Metropolis of IMO State, Nigeria

The study investigated the effects of household waste generation, disposal and management on farmers' health in Owerri metropolis. It specifically ascertained the socio-economic characteristics of the farmers, identified the types and sources of waste in the study area, examined the waste disposal and management methods in the study area examined the effects of inappropriate waste disposal and ascertained the appropriate waste disposal methods used in the study area. A multi stage sampling technique was used to select one hundred and eight farmers from the three Local Government Area in Owerri metropolis. Data were collected using a validated questionnaire and were analyzed using descriptive statistics tool such as mean, frequency, percentage, and mean scores. Results show that waste is majorly generated from markets and residential homes. Waste disposal methods were mainly burning, landfills and open dumping. Its effects includes destroys the beauty of the environment, blocks gutters and drainage system, pollutes the environment among others. Subsequently, appropriate waste disposal methods in the study area includes burning of waste (29.17%), placing of bins at appropriate places (16.07%). The study recommends amongst others that waste management environmental agency should make waste dumps or receptacles accessible to residents, public campaigns should be embarked upon to educate the citizens on ills of dirty environment

Comparing impacts of the COVID-19 pandemic on training of public health Specialty Registrars starting before or after its onset

ObjectivesTo capture and compare the differences in experiences of public health Specialty Registrars who commenced training prior to the COVID-19 pandemic (pre-pandemic Registrars) and those who commenced training during the pandemic (post-pandemic Registrars). Study designThis is a mixed methods study comprising a cross-sectional survey and participatory action research. MethodsA questionnaire of 10 open and 5 closed questions exploring participants experience of training during the pandemic was sent to East Midlands Specialty Registrars. Thematic analysis and double coding were undertaken, coded based on pre- or post-pandemic Registrar status. Participatory action research was then undertaken in 2 rounds with 2 groups, based on pre/post-pandemic status to consolidate themes. ResultsThe survey was completed by 17 Registrars (8 pre-pandemic, and 9 post-pandemic) and 19 Registrars took part in participatory action research. The findings showed pre-pandemic Registrars noted the importance of negative impacts on their mental health whilst post-pandemic Registrars were more positive and felt well supported in their training. ConclusionsThere is a stark difference in the impact of the pandemic for Registrars who started training before compared to during the pandemic. The training programme was not resilient to the impact of the pandemic. Robustness could be increased by encouraging early leadership experience and providing wellbeing support, particularly for post pandemic Registrars now and in future