Geothermal energy potential from analysis of aeromagnetic data of part of the Niger-delta basin, southern Nigeria

Chukwu, Chibuzo Gabriel; Udensi, Emmanuel Emeka; Abraham, Ema Michael; Ekwe, A. C.; Selemo, A. O. I.

doi:10.1016/j.energy.2017.11.040

Cited by 22 publications

(9 citation statements)

References 9 publications

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“…Generally, this study have shown that the geothermal energy sources are viable in those regions that were underlain by basement rocks and it is supported by previous researches conducted by Chukwu et al (2017), Abraham et al (2014), and Anakwuba and Chinwuko, (2015). Despite this numerous abundance across our country, Nigeria, little or no attention has been paid to the chase for geothermal energy exploration.…”

Section: Geothermal Energy Potentials and Its Implicationsupporting

confidence: 82%

“…Therefore, there is great need to investigate and harness the geothermal energy potentials for satisfaction of the nation's energy needs especially around the fields of lighting, transportation, communication, and others. Accordingly, recent researches have shown that the geothermal energy sources are viable in those regions that were underlain by basement rocks, which comprises metamorphic and igneous rocks that were formed from the interior part of the earth (Chukwu et al, 2017, Abraham et al, 2014, Anakwuba and Chinwuko, 2015. Surprisingly,…”

Section: Introductionmentioning

confidence: 99%

“…Thermomagnetic properties such as Curie isotherm depth, subsurface geothermal gradient and heat flow are essential in exploration of geothermal energy. According to several authors (Burke, 1972;Chinwuko et al, 2012, Okonkwo et al, 2012, Abraham et al, 2014Abraham et al, 2015;Biswas et al, 2017;Chukwu et al, 2017), the palaeomagnetic signal of rocks (including the thermomagnetic properties) occurs primarily due to the existence of iron-bearing oxide solid solutions with the spinel crystal structure (like titanomagnetites). These authors also established that there are possibilities of these minerals to obtain strong and stable remanent magnetization due to the presence of Curie temperature, saturation magnetization, and remanence properties of the rock based on their fundamental crystal chemical state and microstructure of minerals.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of thermomagnetic properties and geothermal energy potential in parts of Bida Basin, Nigeria, using spectral analysis

Okonkwo¹,

Chinwuko²,

Onwuemesi³

et al. 2020

Bulletin of the Mineral Research and Exploration

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Thermomagnetic properties and geothermal energy potential in parts of Bida Basin, Nigeria have been evaluated using spectral analysis of integrated nine aeromagnetic data. The study area covering 27,225km 2 of aeromagnetic data was examined and construed in order to delineate the thermal properties of the country rock in the area. The result of the visual inception of residual map reveals that the area comprises an extremely irregular pattern of magnetic intensities that range from 220 to 240nT. Two structural features of folding evidence were also delineated in the area namely; uplift and depression. The result of the lineament structures from the shaded relief map and Rose diagram depicts NE-SW as the major trend with the minor trend in NW-SE. Two depths to magnetic sources were distinguished in the area: the shallower bodies which vary from 1.27 to 1.96km and the deeper bodies that vary from 2.01 to 4.27km. The result also shows an average depth to the centroid as 12.97km in the area. The thermomagnetic properties analysis show average values of 23.12km Curie isotherm, 25.27 o C/km geothermal gradients and 63.17mWm 2 heat flows in the area. The study concludes that the study area possess good potential quality for geothermal energy generation and exploration.

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Section: Geothermal Energy Potentials and Its Implicationsupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Evaluation of thermomagnetic properties and geothermal energy potential in parts of Bida Basin, Nigeria, using spectral analysis

Okonkwo¹,

Chinwuko²,

Onwuemesi³

et al. 2020

Bulletin of the Mineral Research and Exploration

View full text Add to dashboard Cite

show abstract

“…Furthermore, as there have been no known downhole geothermal explorations and data for the various sites in Nigeria, it is perhaps impossible to fully ascertain a 500 MW estimate, particularly an estimate based on temperature [18]. In fact, in [19], and buttressing the work of [9], it was determined that parts of the Niger Delta Basin, in which sig-Open Access Library Journal nificant oil and gas drilling has occurred, has heat flow values of less than 100 mW/m 2 (100 mW/m 2 being the minimum standard for a viable geothermal source).…”

Section: Resultsmentioning

confidence: 99%

Low-Enthalpy Geothermal Springs for Power Generation—An Alternative Approach

Amoo¹

2019

OALib

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The Earth is under increasing stress owing to carbon emissions. Clean energy forms constitute an area of increasing technological interest. Geothermal energy is a clean alternative energy form that can be harnessed from the Earth's core. The use of geothermal energy resources is gaining substantial interest in many countries, as an integral part of 21 st century clean energy solutions and meeting stringent emission requirements. The objective of this research is to investigate an alternative approach to clean and renewable geothermal energy utilization through geothermal ground water pressure applied within a water turbine. The groundwater pressure from the candidate geothermal sites considered is applied to drive a water turbine for the generation of electrical energy. The geothermal candidate sites are low-temperature (i.e. <60˚C) geothermal springs, where it is not beneficial to apply low temperatures in a Rankine cycle steam turbine due to the low enthalpy. Simple calculations are conducted to estimate the electrical energy output of each candidate site. This may technically be regarded as a thermodynamic problem, albeit one that does not require full thermodynamic cycle analysis. The results of the simple non-rigorous analysis indicate that the electrical energy generation potential is greater when using geothermal water pressure (2.5 MW e ) than when using low geothermal temperature (0.005 MW e ).particularly high projected increase in energy demand. The deployment of alternative and clean energy forms will undoubtedly enhance socio-economic conditions, and over time, climate changes will also be reduced (that is, by preventing anthropogenic greenhouse gases from fossil fuels and the resulting warming).According to World Bank estimates, countries in SSA experience annual electrical power outages ranging from 50 h to 4600 h, which can be juxtaposed with the 8760 h available in a year. As a result, the majority of the populace rely on diesel-or-petrol generated internal combustion engine (ICE) to meet electrical energy needs. However, the cost of using such generators is significant. In the most populous nation in Africa, namely Nigeria, the mean net cost of electrical energy from ICE generators is approximately $14 billion annually, whereas in a smaller nation like Senegal it is approximately $4 million annually. These estimates are also higher than the cost of grid electricity. Also, in Nigeria, the unreliable electricity, costs the economy over $25 billion annually. The broader implications thereof include pollutant emissions that endanger both the environment and human health [1] [2].One of the many means of addressing the electrical energy deficit and improving the environment in developing nations may be through the use of renewable energy forms, such as geothermal energy. Diversifying energy resource generation will enhance energy security and help build an all-encompassing base in the mid-to-long-term energy situation. For example, according to the US Energy Information Administration, as of 2018, car...

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“…Mono et al (2018) estimated CPD values, heat flow, and geothermal gradient from spectral analysis of magnetic anomalies in the Loum-Minta region, Cameroun. Using aeromagnetic maps, Chukwu et al (2018) determined CPD and heat flow values for the Niger Delta Basin of Nigeria. Özer andPolat (2017a, 2017b) investigated the relation among seismic velocity, Curie depth, heat flow, and geothermal resources.…”

Section: Introductionmentioning

confidence: 99%

Investigating edge detection, Curie point depth and heat flow using EMAG2 magnetic and EGM08 gravity data in northern part of Eastern Anatolia, Turkey

2019

Turkish J Earth Sci

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The edge detection, the Curie point depths (CPDs), and the heat flow in the northern part of Eastern Anatolia were examined using EMAG2 magnetic and EGM08 Bouguer gravity data. Edge detection methods are extensively employed to delineate the edges of sources using potential field data. In the study area, the tilt angle, total horizontal derivative, theta map, and 3D Euler deconvolution methods were used to delineate the subsurface geology and heterogeneity. The 3D Euler deconvolution method was carried out to determine the depth of the subsurface magnetic and gravity anomalies. The Euler depth solutions show that the depths range from 0 to 15 km for the Bouguer gravity anomalies, while the depths vary from 0 to 16 km for the magnetic anomalies. In this study area, the CPD values vary between 15.7 km and 18.6 km. For a thermal conductivity of 2.5 W m-1 K-1 , the heat flow values were determined to be between 75 and 95 mW m-2. A plot of CPDs versus heat flow values revealed an exponential correlation between heat flow and CPD values. A good relationship was detected between the CPDs and the heat flow values.

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Geothermal energy potential from analysis of aeromagnetic data of part of the Niger-delta basin, southern Nigeria

Cited by 22 publications

References 9 publications

Evaluation of thermomagnetic properties and geothermal energy potential in parts of Bida Basin, Nigeria, using spectral analysis

Evaluation of thermomagnetic properties and geothermal energy potential in parts of Bida Basin, Nigeria, using spectral analysis

Low-Enthalpy Geothermal Springs for Power Generation—An Alternative Approach

Investigating edge detection, Curie point depth and heat flow using EMAG2 magnetic and EGM08 gravity data in northern part of Eastern Anatolia, Turkey

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