Source rock characteristics, depositional setting and hydrocarbon generation potential of Cretaceous coals and organic rich mudstones from Gombe Formation, Gongola Sub-basin, Northern Benue Trough, NE Nigeria

Ayinla, Habeeb A.; Abdullah, Wan Hasiah; Makeen, Yousif M.; Abubakar, M.; Jauro, Aliyu; Yandoka, Babangida M. Sarki; Mustapha, Khairul Azlan; Abidin, Nor Syazwani Zainal

doi:10.1016/j.coal.2017.02.011

Cited by 41 publications

(28 citation statements)

References 29 publications

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“…The oxygen and hydrogen contents are relatively high compared to nitrogen and total sulphur contents. This observed pattern is in agreement with available data in the literature (Ayinla et al 2017).…”

Section: Thermogravimetric Analysis (Tga)supporting

confidence: 93%

“…The comprehensive reports of the geological and stratigraphic progressions in the Benue Trough are highlighted in the literature (Ayinla et al 2017;Obaje et al 2004;Offodile 1976;Petters 1982;Yandoka et al 2016). The upper section of the Benue trough is split at the northeastern side into the basins around Gongola and Yola (Fig.…”

Section: Geological Setting Of Benue Troughmentioning

confidence: 99%

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Petrology, physicochemical and thermal analyses of selected cretaceous coals from the Benue Trough Basin in Nigeria

Akinyemi

Adebayo

Nyakuma

et al. 2020

Int J Coal Sci Technol

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Abundant coal resources that were previously neglected due to a crude oil boom need revitalisation and integration into the national electricity mix to address the energy demands of the Nigerian population. Selected coal samples from the Benue Trough sedimentary basin in Nigeria were examined by various techniques, including proximate and ultimate analyses, organic petrography, Fourier transform infrared ray spectroscopy, and thermogravimetric analysis. Based on vitrinite reflectance, the Lafia-Obi (OLB), Garin Maiganga (GMG), Imiegba (IMG), and Okaba (OKB) coals are classified as subbituminous, while the Lamja1 (LMJ1), Lamja2 (LMJ2) and Chikila (CHK) coals are high volatile B bituminous. The Enugu (ENG) coal is on the boundary between subbituminous and high volatile C bituminous. Organic petrographic results indicate vitrinite and fusinite contents steadily increase from the Lower Benue Trough coals to the Upper Benue Trough coals, while semifusinite and total mineral contents follow a reverse pattern. Thermal decomposition occurred in three stages, i.e., drying, devolatilization, and coke formation above 700°C; and the coal reactivity follows the following order, ENG [IMG[IGH[CHK[LMJ[OKB[GMG[LFB. The higher temperatures (above 900°C) are required to decompose the coals for efficient energy recovery. The LMJ1, LMJ2, OLB, CHK, GMG, and OKB coals can be exploited for electricity power generation. However, the Imeagha and Enugu coals are best suitable for both cement and power generation.

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Section: Thermogravimetric Analysis (Tga)supporting

confidence: 93%

Section: Geological Setting Of Benue Troughmentioning

confidence: 99%

Petrology, physicochemical and thermal analyses of selected cretaceous coals from the Benue Trough Basin in Nigeria

Akinyemi

Adebayo

Nyakuma

et al. 2020

Int J Coal Sci Technol

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“…However, this requires comprehensive characterisation of the fuel and energy properties of the nation's coal resources, particularly the newly discovered deposits around the country. It is envisaged that the findings will contribute to the existing literature on the geology and geochemistry (Ayinla et al 2017b;Akinyemi et al 2020a), petrology and petrography (Wuyep and Obaje 2012;Ayinla et al 2017a), mineralogy and sedimentology (Ogala et al 2012;Sonibare et al 2013) of selected Nigerian coals in the literature. Other studies have critically examined the physicochemical (Akinyemi et al 2020a), thermal and kinetic properties (Sonibare et al 2005;Nyakuma et al 2016) of selected Nigerian coals.…”

Section: Introductionmentioning

confidence: 84%

“…The geology and stratigraphic successions in the Benue Trough have been extensively reviewed (Yandoka et al 2016;Ayinla et al 2017b). The upper part of the trough bifurcates at its northeastern end into the Gongola and the Yola basins ( Figure 1).…”

Section: Geological Settingsmentioning

confidence: 99%

Physicochemical, Mineralogy, and Thermo-Kinetic Characterisation of Newly Discovered Nigerian Coals under Pyrolysis and Combustion Conditions

Nyakuma

Jauro

Akinyemi

et al. 2020

Preprint

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In this study, the physicochemical, microstructural, mineralogical, thermal, and kinetic properties of three (3) newly discovered coals from Akunza (AKZ), Ome (OME), and Shiga (SHG) in Nigeria were examined for potential energy recovery. Physicochemical analysis revealed high combustible but low levels of polluting elements. The higher heating values (HHV) ranged from 18.65 MJ/kg (AKZ) to 26.59 MJ/kg (SHG). Microstructure and mineralogical analyses revealed particles with a rough texture, surfaces, and glassy lustre, which could be ascribed to metals, quartz, and kaolinite minerals. The major elements (C, O, Si, and Al), along with minor elements (Ca, Cu, Fe, K, Mg, S, and Ti) detected are associated with clays, salts, or the porphyrin constituents of coal. Thermal analysis showed mass loss (M L ) ranges from 30.51% – 87.57% and residual mass (R M ) from 12.44% – 69.49% under combustion (oxidative) and pyrolysis (non-oxidative) TGA conditions due to thermal degradation of organic matter, vitrinite, inertinite and liptinite macerals. Kinetic analysis revealed that the coal samples are highly reactive under the non-isothermal oxidative and non-oxidative conditions based on the Coats-Redfern Model. The activation energy ( E a ) ranged from 23.81 kJ/mol – 89.56 kJ/mol whereas the pre-exponential factor ( k o ) ranged from 6.77×10 -04 min -1 – 1.72×10 03 min -1 under pyrolysis and combustion conditions. In conclusion, the coals are practical feedstocks for either industrial applications or energy recovery.

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“…Coals can be one of the most important source rocks for oil and gas (Ayinla et al, 2017;Petersen et al, 2010;Snowdon, 1991). Coaly rocks as sources for oil and gas have been found in a number of oil basins worldwide, including the Jurassic of the Turpan-Hami Basin (Huang et al, 1991;Shao et al, 2003;Wu et al, 2016;Zhang et al, 1997), the Late Cretaceous to Eocene of the Gippsland Basin (Smith and Cook, 1984), and the Cretaceous-Cenozoic of the Taranaki Basins (Sykes et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Petrology and hydrocarbon significance of the coaly source rocks from the Pinghu Formation in the Xihu Sag, East China Sea Shelf Basin

Liu

Kang

Shen

et al. 2020

Energy Exploration & Exploitation

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The Xihu Sag in the East China Sea Shelf Basin contains abundant oil and gas reserves and is a focus for hydrocarbon exploration and development. Source rocks are mainly coals and coal-measures mudstones in the Paleogene Pinghu and Huagang formations. Samples from the Pinghu Formation in the Xihu Sag were collected for petrology, total organic carbon, and Rock-Eval analysis for the purpose of investigating macerals component and their contributions to hydrocarbon generation potential. The coaly source rocks from the Pinghu Formation are dominated by vitrinite (average 86.18%) but have an obviously elevated content of liptinite (average 12.59%) and a much lower amount of inertinite (average 1.23%). Liptinite of the samples is mainly composed of resinite, with a small amount of cutinite, sporinite and alginate in descending order. TOC values are 37.55%–65.58% (average 49.16%). Effective HI values are 167–281 mg HC/g TOC (average 223.5 mg HC/g TOC), suggesting the organic matter is type II kerogen. Relatively high HI values and macerals components suggest that the coaly source rocks can generate both oil and gas. Although the liptinite in the coaly source rocks has a content lower than vitrinite values, it makes a significant contribution to both total hydrocarbon and liquid hydrocarbon generation. The contributions of vitrinite, liptinite and inertinite to the total hydrocarbon generation approximately are 63.21%, 36.46% and 0.33%, respectively. The contributions of vitrinite and liptinite to the liquid hydrocarbon generation are approximately 40.95% and 59.05%, respectively. These results demonstrate that the coaly source rocks are dominated by vitrinite macerals with a relatively higher content of liptinite macerals, especially resinite, and these source rocks are more prone to both total hydrocarbon and liquid hydrocarbon generation. Paleogene coaly source rocks from other parts of the world should be considered for their oil-prone nature.

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Source rock characteristics, depositional setting and hydrocarbon generation potential of Cretaceous coals and organic rich mudstones from Gombe Formation, Gongola Sub-basin, Northern Benue Trough, NE Nigeria

Cited by 41 publications

References 29 publications

Petrology, physicochemical and thermal analyses of selected cretaceous coals from the Benue Trough Basin in Nigeria

Petrology, physicochemical and thermal analyses of selected cretaceous coals from the Benue Trough Basin in Nigeria

Physicochemical, Mineralogy, and Thermo-Kinetic Characterisation of Newly Discovered Nigerian Coals under Pyrolysis and Combustion Conditions

Petrology and hydrocarbon significance of the coaly source rocks from the Pinghu Formation in the Xihu Sag, East China Sea Shelf Basin

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