Onwukwe Stanley Ibuchukwu

Federal University of Technology Owerri | FUTO · Department of Petroleum Engineering

The presence of sand particles flowing along with reservoir fluids in a pipeline increases the probability of pipeline failure. The risk of pipeline failure is either accentuated or abated by the flow conditions of the fluids in the pipeline. In this study, a quantitative risk analysis of the effect of sand on pipelines during multiphase flow, unde...

Fluid flow in gas condensate reservoir is very complex and involves phase changes, multiphase flow of the fluid, phase redistribution in and around the wellbore and retrograde condensation. This study seeks to evaluate the effect of hydraulic fracturing on gas and liquid production of gas condensate reservoir with pressure below dewpoint. This rese...

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 mate...

A common problem in edge-water drive reservoirs is inability to recover remaining oil bypassed by encroaching water from the aquifer. Early incidence of these water channels causes premature water production that leads to well abandonment at high water cuts. This early water production leads to poor sweep efficiency and low recovery from the reserv...

Poor formation permeability and near well bore damage may limit water injectivity into the reservoir in a water injection project. This paper seeks to evaluate the effect of radial drilling technique on water injectivity and oil recovery in water flooding operation. Radial drilling technology utilizes hydraulic energy to create lateral perpendicula...

With the most recent down turn in the oil industry, there is an urgent need to optimize production from deepwater oil fields. Adopting a technically sound and cost-effective severe slug mitigation technique is very important. In this work, a sample deepwater oil field in West-Africa operating at over 1000m water depth, currently operating at over 1...

Inflow control devices (ICD) have been used to balance flux around completions and also delay break-through of unwanted water into completions. Inflow-control devices (ICDs) were provided to curtail water production from heterogenous reservoirs with strong aquifer systems and/or supported with water injection. The model for the ICD consists of pres...

Application of nanofluids flooding in the oil and gas industry is recently emerging as enhanced oil recovery methods. Nanoparticles have the ability to alter the rock formation in order to recover oil trapped in the pores of the rock to improve oil recovery. In this study, core plug samples were formulated in the laboratory to investigate the effec...

Obikpo field was discovered in the late 1960s, and since then over 40 wells have been drilled. By the end of the year 2018, more than 68 MMstb oil would have been produced from the field. Water cut has risen to over 65% and this affects performances of oil wells. The field is geologically complex, heterogeneous and divided by large faults; leading...

Disposal of condensate produced from stranded gas field have been a major concern to producing companies due to unavailability of nearby oil flow stations to receive the condensate, which have resulted to abandonment of such fields. This work seek to improve the thermodynamic properties (Heat Capacity, Heating Value, Specific Heat capacity, Heat of...

A review of Niger Delta oil fields indicate that most of them are brown fields and as such vulnerable to coming due to reduced size of oil column, low oil production and lack of access to the residual oil trapped between the existing wells in the field. Due to coming in such fields, most wells have been shut-in and slot of interventions in for of w...

This research work looked at the concept and analysis of waterflooding as a means of enhancing oil production at commercial scale from oil reservoirs in the Niger Delta, south of Nigeria. It covers the linear flow profile of water injection through an input end (well 1) and production of oil and water at the output end (well 2). Relying on some bas...

This paper is a continuation of SPE paper 189167 (A realistic kick simulator for casing design-part 1). A transient kick simulator that is based on kick tolerance concept using the drillers’ method was developed for well design. The purpose of this work is to demonstrate how the formulated model was used in well design. Supplementary models was dev...

The problem of wellbore pressure drop on horizontal well performance has been a concern to many researchers and the petroleum industry. Wellbore pressure losses in horizontal well not only increases gas or water conning tendency at the heel of the wellbore but also chokes oil production at the distant part of the wellbore especially for long horizo...

A common problem in edge-water drive reservoirs is inability to recover remaining oil bypassed by encroaching water from the aquifer. Early incidence of these water channels causes premature water production that leads to well abandonment at high water cuts. This early water production leads to poor sweep efficiency and low recovery from the reserv...

A generic oil rim simulation was carried out to deepen the understanding of the oil rim recovery mechanism under two development options: natural depletion and water injection. A horizontal well of 1800 ft. length was used as the producer for both cases, and a vertical injector well was used for the water injection case. The economics of the two de...

Being unable to produce more than 35-55% of the original oil in place after the application of primary and secondary oil recovery techniques gave rise to the need for developing enhanced oil recovery techniques, hence the need to carry out further research on MEOR arose. In this paper, the mechanisms behind MEOR were discussed and also the factors...

This work proposes the use of data division and if statements in a programming language, as an effective classifier in Artificial Neural Network. The Standing and Katz chart was digitized to obtain input (pseudo reduced temperature and pressure) and output (gas compressibility factor) data points, which was used in developing the artificial neural...

Most reservoir in mature oil fields are vulnerable to challenges of water and/or gas coning as the size of their oil column reduces due to extensive period of oil production. These often result to low oil production and excessive water and/or gas production. This study therefore seeks to evaluate the occurrence of coning through the movement of flu...

The separation of wax as a solid phase from wax-prone crude oils and subsequent accumulation in tubings, flowlines, process equipment and pipelines is a major problem confronting the oil industry all over the world with its attendant high operational costs. To address these problems, this paper seeks to characterize waxy crudes for wax deposition t...

Water injection is a notable method used primarily for reservoir pressure maintenance and voidage replacement which boosts oil recovery. A problem associated with water injection operation is the injectivity loss due to rock porosity and fluid resistance to displacing oil to producing well, formation damage caused by accumulation of oil and solid p...

When drilling for hydrocarbon, one most important thing to recognise is the bottom hole cleaning. Poor well hydraulics will lead to poor bottom hole cleaning. Several suggestions have been made in years back to prevent cuttings from falling to the lower side of the borehole thereby forming cutting bed. One of the main functions of drilling fluids i...

The need to optimize rheological parameters by the use of appropriate techniques is the best consideration in drilling mud rheology studies. Various methods are used considering experience on the side of the user, available methods, and flow in pipe or annulus and depending on whether study is done in the field or for research purposes. Mucuna sola...

The aim is to determine the impact of substitution of a local material for another, on rheological properties and hole cleaning capability. A local biopolymer Mucuna solannie was used as a substitute for another biopolymer, Detarium microcarpum, primarily as a viscosifier in a water-based drilling fluid. Tests were carried out using standard equipm...

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;...

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Saturates, aromatics, resins, asphaltenes (SARA) analysis is one method of characterizing crude oils. It is versatile because it can apply to many components of the crude oil. SARA analysis furnishes one with the composition of any crude and ultimately gives an idea of the potential of the crude oil to precipitate and deposit wax. This analysis met...

Water coning in oil reservoirs pose serious hindrance to optimizing oil production as unwanted fluids tend to replace the oil in the production stream, which invariably limits the ultimate oil recovery. The coning of water into production wells is caused by pressure gradients established around the wellbore by the production of fluids from the well...

Natural gas hydrate (NGH) technology is a feasible alternative to capture associated-gas, which are usually difficult to harness in the stranded and/or marginal oil field. The importance of gas hydrates is related to its potential to be able to contain about 160 Sm 3 of gas and 0.85 m 3 of water in 1 m 3 of gas hydrate at standard temperature and p...

There has been persistent effort by the government and the operating oil companies to develop gas infrastructure in Nigeria. These have led to the steady reduction in gas flares in the oil producing areas. If the country is to practically eliminate gas flaring by 2020 when it envisage to be among the twenty developed country in the world (Vision 20...

A review of some Niger Delta oil field reservoirs indicates that most of the reservoirs are at the mature stages, thereby vulnerable to challenges such as; coning due to reduced size of the oil column, low oil production and lack of access to the residual oil trapped between existing wells of the mature field. Due to coning occurrences in the Niger...

Mathematical model equation was successfully developed for improving oil recovery in Gas-Condensate Reservoirs. The condensable hydrocarbons recovery modelling using water injection at dew-point pressure was developed based on traditional simulation and can be used in condensable hydrocarbons recovery evaluations. The primary input data of the mode...

Mathematical model equation was successfully developed for improving oil recovery in Gas-Condensate Reservoirs. The condensable hydrocarbons recovery modelling using water injection at dew-point pressure was developed based on traditional simulation and can be used in condensable hydrocarbons recovery evaluations. The primary input data of the mode...

Mathematical model equation was successfully developed for improving oil recovery in Gas-Condensate Reservoirs. The condensable hydrocarbons recovery modelling using water injection at dew-point pressure was developed based on traditional simulation and can be used in condensable hydrocarbons recovery evaluations. The primary input data of the mode...

This study examines the potential improvements in recovery factors in optimizing oil production from oil rim reservoirs through water injection and without water injection (i.e. primary production) scenarios in the development strategies of the oil rim reservoirs. A generic simulation model developed from ECLIPSE dynamic simulator was used as core...

This study examines the potential improvements in recovery factors in optimizing oil production from oil rim reservoirs through water injection and without water injection (i.e. primary production) scenarios in the development strategies of the oil rim reservoirs. A generic simulation model developed from ECLIPSE dynamic simulator was used as core...

Water and gas coning in oil rim reservoirs pose serious hindrance to optimizing oil production in the thin oil beds as unwanted fluids tend to replace the oil in the production stream. This invariably limits the ultimate oil recovery. In this study, Semi-Analytical models of estimating critical rate and optimum horizontal well placement was develop...

Most reservoirs in the Niger Delta are characterized by relatively thin oil columns that are overlain by a primary gas cap and underlain by bottom water. The completion pattern in such reservoirs is such that perforation intervals fall somewhere between the gas-oil contact and oil-water contact. A review of the production performance of producing w...