All Outputs (16)

Investigating the flow behaviour of CO2 and N2 in porous medium using core flooding experiment (2021)
Journal Article
Mohammed, N., Abubakar, A., Enyi, G., Abba, M., Onukak, I., Saidu, B., …Yar’adua, H. (2022). Investigating the flow behaviour of CO2 and N2 in porous medium using core flooding experiment. Journal of Petroleum Science and Engineering, 208(E), 109753. https://doi.org/10.1016/j.petrol.2021.109753

Several researchers employed N2 to augment CH4 recovery efficiency and CO2 sequestration during the Enhanced Gas Recovery (EGR) process in consolidated rocks. To our knowledge, there has been limited data backing the reason why CO2 experienced a more... Read More about Investigating the flow behaviour of CO2 and N2 in porous medium using core flooding experiment.

The role of N2 as booter gas during Enhanced Gas Recovery by CO2 flooding in a porous medium (2021)
Journal Article
Mohammed, N., Abbas, A., & Enyi, G. (2021). The role of N2 as booter gas during Enhanced Gas Recovery by CO2 flooding in a porous medium. Journal of Natural Gas Science and Engineering, 93, 104051. https://doi.org/10.1016/j.jngse.2021.104051

Most research on CO2 flooding is focusing on CO2 storage than CH4 recovery and mostly simulation-based. To our knowledge, there have been limited reported experimental on CO2 injections capable of unlocking a high amount of the residual methane due t... Read More about The role of N2 as booter gas during Enhanced Gas Recovery by CO2 flooding in a porous medium.

Enhanced gas recovery by nitrogen injection : the effects of injection velocity during natural gas displacement in consolidated rocks (2020)
Journal Article
Mohammed, N., Abbas, A., Enyi, G., Edem, D., & Suleiman, S. (2020). Enhanced gas recovery by nitrogen injection : the effects of injection velocity during natural gas displacement in consolidated rocks. Journal of Natural Gas Science and Engineering, 83, 103513. https://doi.org/10.1016/j.jngse.2020.103513

The choice of the flow velocity in EGR thus becomes important since higher injection rates could lead to premature mixing of the fluids and lower injection rates generally provide longer resident times for the fluids in contact and indirectly incre... Read More about Enhanced gas recovery by nitrogen injection : the effects of injection velocity during natural gas displacement in consolidated rocks.

Alternating N2 gas injection as a potential technique for enhanced gas recovery and CO2 storage in consolidated rocks : an experimental study (2020)
Journal Article
Mohammed, N., Abbas, A., Enyi, G., Suleiman, S., Edem, D., & Abba, M. (2020). Alternating N2 gas injection as a potential technique for enhanced gas recovery and CO2 storage in consolidated rocks : an experimental study. Journal of Petroleum Exploration and Production Technologies, 10(8), 3883-3903. https://doi.org/10.1007/s13202-020-00935-z

The promotion of enhanced gas recovery (EGR) and CO2 storage is still shrouded in contention, and is not well accepted, due to the excessive in-situ CO2 mixing with the nascent natural gas. This adulterates the recovered CH4 and thus, results in a... Read More about Alternating N2 gas injection as a potential technique for enhanced gas recovery and CO2 storage in consolidated rocks : an experimental study.

Enhancing the performance of Xanthan gum in water-based mud systems using an environmentally friendly biopolymer (2020)
Journal Article
Akpan, E., Enyi, G., & Nasr, G. (2020). Enhancing the performance of Xanthan gum in water-based mud systems using an environmentally friendly biopolymer. Journal of Petroleum Exploration and Production Technologies, 10, 1933-1948. https://doi.org/10.1007/s13202-020-00837-0

Xanthan gum is commonly used in drilling fluids to provide viscosity, solid suspension, and fluid-loss control. However, it is sensitive to high temperatures and not tolerant of field contaminants. This paper presents an experimental study on the eff... Read More about Enhancing the performance of Xanthan gum in water-based mud systems using an environmentally friendly biopolymer.

Water-based drilling fluids for high-temperature applications and water-sensitive and dispersible shale formations (2019)
Journal Article
Akpan, E., Enyi, G., Nasr, G., Yahaya, A., Ahmadu, A., & Saidu, B. (2019). Water-based drilling fluids for high-temperature applications and water-sensitive and dispersible shale formations. Journal of Petroleum Science and Engineering, 175(Apr 19), 1028-1038. https://doi.org/10.1016/j.petrol.2019.01.002

This study examines the effectiveness of sodium erythorbate, potassium formate, and polyethylene glycol for the formulation of high-performance water-based drilling fluids. High-performance water-based drilling fluids are environmentally-friendly, re... Read More about Water-based drilling fluids for high-temperature applications and water-sensitive and dispersible shale formations.

Stabilizing biopolymers in water-based drilling fluids at high temperature using antioxidants, a formate salt, and polyglycol (2018)
Journal Article
Akpan, E., Enyi, G., Nasr, G., & Yahaya, A. (2018). Stabilizing biopolymers in water-based drilling fluids at high temperature using antioxidants, a formate salt, and polyglycol. Journal of Engineering Technology, 7(2), 469-486

Biopolymers degrade in water-based drilling fluids when exposed to high temperatures for some time, thus leading to hole-cleaning problems such as stuck pipe. To stabilise biopolymers in drilling fluids, the mechanisms by which they degrade at elevat... Read More about Stabilizing biopolymers in water-based drilling fluids at high temperature using antioxidants, a formate salt, and polyglycol.

Compressed natural gas : gas distribution option for Sub-Saharan West Africa (2018)
Journal Article
Enyi, G., Welekwe, D., & Appah, D. (2018). Compressed natural gas : gas distribution option for Sub-Saharan West Africa. Journal of Engineering Technology, 7(2), 356-376

Natural gas production in Sub-Saharan West African is projected to grow annually by 5% from 2010 to 2040. The distribution of this gas is vital to economic growth in the sub region. Compressed Natural Gas (CNG) which is natural gas that has been comp... Read More about Compressed natural gas : gas distribution option for Sub-Saharan West Africa.

Experimental investigation of methane-water and methane-brine IFT measurements using pendant drop (rising bubble) method (2018)
Journal Article
Yahaya, A., Akpan, E., Enyi, G., Nasr, G., & Abbas, A. (2018). Experimental investigation of methane-water and methane-brine IFT measurements using pendant drop (rising bubble) method. Journal of Engineering Technology, 6(1), 394-407

Gas hydrate formation involves low molecular gas mass transfer to a cage-like structure formed by water molecule under low temperature and high-pressure conditions. Gas hydrate is considered a problem if it develops along a pipeline. In order to solv... Read More about Experimental investigation of methane-water and methane-brine IFT measurements using pendant drop (rising bubble) method.

Economic evaluation of environmentally friendly vegetable oil-based invert emulsion (2017)
Journal Article
Ihenacho, P., Burby, M., Nasr, G., & Enyi, G. (2017). Economic evaluation of environmentally friendly vegetable oil-based invert emulsion. Journal of Engineering Technology, 6(2), 776-783

Stringent environmental regulations and technical requirements of difficult formations such as shale demand the use of functional mud system to complete a well safely and economically. The economic viability of 50/50 oil-water ratio invert emulsion... Read More about Economic evaluation of environmentally friendly vegetable oil-based invert emulsion.

Impact pressure distribution in flat fan nozzles for descaling oil wells (2016)
Journal Article
Abbas, A., Nasr, G., Nourian, A., & Enyi, G. (2016). Impact pressure distribution in flat fan nozzles for descaling oil wells. Journal of Energy and Power Engineering, 10(6), 352-357. https://doi.org/10.17265/1934-8975/2016.06.003

The suitability of high pressure nozzles in terms of impact upon targeted surfaces has indicated its effectiveness for the cleaning of oil production tubing scale, which has recently attracted wider industrial applications considering its efficiency... Read More about Impact pressure distribution in flat fan nozzles for descaling oil wells.

Utilization of egg yolk as a non-toxic emulsifier in environmentally friendly invert emulsion drilling mud (2016)
Journal Article
Ihenacho, P., Burby, M., Nasr, G., & Enyi, G. (2016). Utilization of egg yolk as a non-toxic emulsifier in environmentally friendly invert emulsion drilling mud. Journal of petroleum engineering & technology (Online), 6(1),

Vegetable oil such as Jatropha has been shown to be a comparable alternative to diesel and mineral oils for environmentally friendly oil based drilling mud. However compatibility of the vegetable oils with the usual chemical additives is still a majo... Read More about Utilization of egg yolk as a non-toxic emulsifier in environmentally friendly invert emulsion drilling mud.

The effects of dissolved Sodium Chloride (NaCl) on well injectivity during CO2 storage into saline aquifers (2016)
Journal Article
Beinashor, R., Nourian, A., Nasr, G., & Enyi, G. (2016). The effects of dissolved Sodium Chloride (NaCl) on well injectivity during CO2 storage into saline aquifers. Journal of petroleum engineering & technology (Online), 6(2),

Saline aquifer formations seem to be promising candidates for carbon dioxide (CO2) storage due to their wide availability as well they have large storage capacity. Once CO2 is injected into saline aquifer variety of processes will take place, among o... Read More about The effects of dissolved Sodium Chloride (NaCl) on well injectivity during CO2 storage into saline aquifers.

50/50 oil-water ratio invert emulsion drilling mud using vegetable oil as continuous phase (2016)
Journal Article
Ihenacho, P., Burby, M., Nasr, G., & Enyi, G. (2016). 50/50 oil-water ratio invert emulsion drilling mud using vegetable oil as continuous phase

Formulation of a low oil-water ratio drilling mud with vegetable oil continuous phase without adversely affecting the mud rheology and stability has been a major challenge. A low oil-water ratio is beneficial in producing low fluid loss which is esse... Read More about 50/50 oil-water ratio invert emulsion drilling mud using vegetable oil as continuous phase.

Integration of Nano CT and SEM in study of Marcellus Shale Heterogeneity (2015)
Journal Article
Amadi, F., Enyi, G., & Nasr, G. (2015). Integration of Nano CT and SEM in study of Marcellus Shale Heterogeneity. Journal of petroleum engineering & technology (Online), 5(3), 39-51

The increase in exploration and production in Shale gas reservoir, and few studies so far reported regarding the general topology of tight reservoir, it is now imperative to critically understand the complexities surrounding the geology of Shale rese... Read More about Integration of Nano CT and SEM in study of Marcellus Shale Heterogeneity.

Optimization of multi-zone unconventional (shale) gas reservoir using hydraulic fracturing technique (2015)
Journal Article
Amadi, F., Enyi, G., & Nasr, G. (2015). Optimization of multi-zone unconventional (shale) gas reservoir using hydraulic fracturing technique

Hydraulic fracturing is one of the most important stimulation techniques available to the petroleum engineer to extract hydrocarbons in tight gas sandstones. It allows more oil and gas production in tight reservoirs as compared to conventional means.... Read More about Optimization of multi-zone unconventional (shale) gas reservoir using hydraulic fracturing technique.