Welcome to FUTOSpace
FUTOSpace is the Federal University of Technology, Owerri open-access repository that collects, preserves and make available in digital format the intellectual output of the university's community:
Communities in FUTOSpace
Select a community to browse its collections.
- This community features addresses and speeches delivered by the University management and other official visitors to FUTO
- A community of media or content used to convey information about an event organized at the university
- This community features books, book chapters and books published by faculty members in the university
- This Community features the proceedings of conferences, seminars and workshops hosted by the FUTO or other bodies but had staff from FUTO attending and making presentations
- This community features research articles from FUTO staff published in journals hosted by FUTO
- A community of series of scholarly public lectures designed to commemorate a faculty member's appointment to a professorship
- Scholarly resources with relevant discussion points for use by faculty as teaching lectures, student reading content, and study guides
- A community of printed document containing information about activities in FUTO
- A community of series of lectures aimed at educating FUTO staff and the public about a specific area of study
- A community of question(s) administered to FUTO students in an examination
- Published Research Outputs
- Theses and dissertations by students and staff from all the Schools in FUTO
Recent Submissions
Performance characteristics of Parkia biglobosa as fluid loss control agent in aqueous mud system
(2020) Uwaezuoke, Nnaemeka; Onwukwe, Ibuchukwu S.; Igwilo, Chinweuba K.; Duru, Ugochukwu I.; Obah, B
Recent trend in the use of biomaterials in oilfield applications involves minimum refining and purification. The effectiveness of Parkia biglobosa as fluid loss control additive in aqueous based mud was tested according to API standard. The effect of temperature on the formulation was determined to identify any deviation due to presence of the material in the formulation. At 8ppb concentration used, 3.6mL fluid loss and 1.1mm filter cake thickness were recorded; compared with 8mL and 0.8mm, and 5.4mL and 0.8mm of Pleurotus and PAC respectively. Both fluid loss and filter cake thickness increased with increase in temperature. A low-flat discontinuous gel was observed at elevated temperatures which is desirable. Other drilling fluid rheological parameters were not adversely altered by the presence of the material, even at elevated temperature conditions. The biodegradable material was found to be suitable as fluid loss agent, both in effectiveness and environmental consideration since it is biodegradable, and might reduce cost of formulation since minimum processing is required.
An economic evaluation of investment in Mucuna solannie production
(2016) Uwaezuoke, N.; Obah, Boniface; Onwukwe, Stanley I.; Igwilo, Kevin C.
Mucuna solannie, a perennial crop, is a Fabaceae found in the South East of Nigeria and in some African and Asian countries. It exhibits interesting properties as a food additive, where it serves as viscosifier. It has, hence, been tested and used to formulate a drilling mud. The drilling mud formulated from it compares quite fine with other muds; with excellent rheological properties. It is suitable for top hole sections. The purpose of Mucuna solannie farming, as a cash crop, is to maintain adequate supply for continued application in the drilling industry; hence, it is a business venture. Also, a comprehensive list of processing equipment has been provided. The study gives the first pass assessments of the requirements for production and processing, necessary for sustained supply. A suitable farm location has been found in South-East Nigeria. Square planting pattern, on 10 hectares area of land, based on one plant per hill, with no filler crops, has been shown to yield 63.9 metric tonnes per year. An initial minimum investment of about $820,920 is required for seeds, land rent, equipment costs and other contingencies; with projected minimum revenue of $283,500 per year, at 22% DCF ROR, if the venture must remain profitable.
Determining the optimum concentration of multiwalled carbon nanotubes as filtrate loss additive in field‑applicable mud systems
(Springer, 2019) Okoro, Emeka E.; Zuokumor, Anita A.; Okafor, Ikechukwu S.; Igwilo, K, C.; Orodu, Kale B.
In a bid to combat fluid loss in muds where the effects of high downhole temperatures have pronounced effects on conventional fluid loss additives, several materials have over time been evaluated. One of such materials is the multiwalled carbon nanotubes (MWCNTs). Most studies in the literature limit the scope of their investigation to how the MWCNT affects mud rheology when added in minute concentrations (0.01–1 ppb). In this study, however, the performance of high concentrations (0.5–3 ppb) of multiwall carbon nanotubes as fluid loss control additives in field-applicable mud systems was put to the test. The essence was to establish an optimal concentration useful for field applications. The degree to which the introduction of varying concentrations of the MWCNT altered the muds capacity to control filter loss was the cardinal areas evaluated. The following are the major outcomes of the experimental study: The plastic viscosity, the yield point and the gel strengths showed a progressive increase as the concentration of the MWCNT in the mud increased for both the water- and oil-based muds. However, an optimum concentration of 2 ppb was observed for the water-based mud. For the filter loss tests on the oil-based mud, the results indicate that low concentrations (0.5 ppb) of the MWCNT led to high filter loss volumes (15 ml), but an increase up to 2.5 ppb reduced the margin of the filter loss volume by 52% (7 ml) from the initial value and a 50% decrease for the standard case. In the case of the water-based mud, equivalent amounts of MWCNT recorded less fluid loss than the standard. A moderately hard and firm cake was reported for all concentrations of the standard and MWCNT for the water- and oil-based muds; however, their cake thickness values were 2 mm and 1 mm for the water- and the oil-based muds, respectively
Data on shale-water based drilling fluid interaction for drilling operation
(Elsevier, 2018) Okoro, Emeka Emmanuel; Igwilo, Kevin C.; Mamudu, Angela Onose; Ekeinde, Evelyn Bose; Adewale, Dosunmu
The shale dispersion test (rolling test) is a common procedure that is used to measure the interactions between drilling fluids and shales. The shale rolling test depends on the moisture content of the shale, the shale composition, the viscosity of the test fluid, the rotation speed of the rollers, and the test temperature. The rheological behavior of the test fluid has the strongest influence on test results. The data was generated experimentally, shale samples from Agbada an formation Niger-Delta was used. These shale samples were cored at a depth of 2000ft and 3400ft. Water based mud that will minimize shale dispersion and swelling of shale was formulated. The dispersion test was conducted, and it involves exposing a weighted quantity of sized shale to the formulated mud in roller-oven. This test is used to design fluids and screen the effectiveness of inhibitor additives to maintain the integrity of the cuttings and minimize the interaction of fluids with the shale sections during the drilling and completion operations. The swelling test was conducted and the linear expansion adopted because it is the most representative of the increase seen by the wellbore but was measured in the direction perpendicular to the bedding plane as this is the direction of swelling into the wellbore.
Cellulosic Cyperus esculentus L. as a filtrate loss modifier in field applicable aqueous and non-aqueous drilling fluids
(Springer, 2019) Okoro, Emeka Emmanuel; Igwilo, Kevin C.; Ifeka, Kelvin; Okafor, Ikechukwu S.; Idowu, Sangotade
The design and formulation of drilling fluids require additives that are cost-effective and environmental friendly in line with international best practices. This study was conducted to investigate the potentials and effects of Cyperus esculentus (Tiger Nut) as a filtrate loss modifier in field applicable aqueous and non-aqueous drilling fluids. Sixteen (eight aqueous and eight non-aqueous) drilling fluid systems were formulated, four aqueous and non-aqueous had Cyperus esculentus as a filtration additive, while the others do not contain the additive. The rheological properties, as well as the fluid filtration properties of the drilling muds, were investigated and compared with standard drilling mud. To ascertain validity, the results obtained were validated with the classic filtration model to ensure fit. Results obtained showed that the formulated mud systems had rheological properties that favored the suspension and transportation of drill cuttings, as well as the prevention of flocculation and clogging of drill strings. The rheological properties also showed a progressive trend as the concentrations of the additive were increased from 2 to 8 ppb. It was also further observed from the API and HPHT filter press test that the increase in the concentration of the additive exhibits a progressive trend that can be compared with the standard. In addition, it was observed from the classic filtration model that the experimental results from both mud systems were fit for the adopted model.