The biogenic methane potential of European gas shale analogues: Results from incubation experiments and thermodynamic modelling

Krüger, Martin; Berk, Wolfgang van; Arning, Esther T; Jiménez, Núria; Schovsbo, Niels H.; Straaten, Nontje; Schulz, Hans-Martin

doi:10.1016/j.coal.2014.09.012

Cited by 14 publications

(16 citation statements)

References 47 publications

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“…2). Accumulated production and generation rates from coal and shale incubations presented in previous works are considerably higher than those obtained in this study (Jones et al, 2010;Papendick et al, 2011;Susilawati et al, 2013;Krüger et al, 2014). However, several differences in the applied methods inhibit direct comparisons.…”

Section: Implications For Natural Gas Potential and Greenhouse Gas Emcontrasting

confidence: 73%

“…The lack of correlation between TOC and CH 4 and CO 2 production in samples from the Ponta Grossa and Irati Formations is probably related to heterogeneities in their organic matter composition and higher thermal maturity, since these factors directly affect substrate bioavailability (Meslé et al, 2013;Krüger et al, 2014).…”

Section: Factors Controlling Ch 4 and Co 2 Productionmentioning

confidence: 94%

“…Bioavailable organic matter is an important limiting factor for CH 4 production in coal and shale systems (Jones et al, 2008;Gao et al, 2013;Krüger et al, 2014). The sensitivity of CH 4 production to bioavailable substrate depletion was detected by headspace refilling and acetic acid addition tests performed in this study.…”

Section: Factors Controlling Ch 4 and Co 2 Productionmentioning

confidence: 99%

“…Thus, a relatively high concentration of acetic acid was also employed due to the possible input of organic acids in the system via oil biodegradation (Seewald, 2003;Lundegard and Kharaka, 1994). Krüger et al (2014) modeled concentrations of acetate reaching 4.9 mM in formation waters related to oil biodegradation. Additionally, other incubations were assembled with fresh samples and deionized water addition (20 ml).…”

Section: Incubation Experiments and Gas (Ch 4 And Co 2 ) Analysismentioning

confidence: 99%

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Biogenic methane and carbon dioxide generation in organic-rich shales from southeastern Brazil

Bertassoli

Sawakuchi

Almeida

et al. 2016

International Journal of Coal Geology

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Section: Implications For Natural Gas Potential and Greenhouse Gas Emcontrasting

confidence: 73%

Section: Factors Controlling Ch 4 and Co 2 Productionmentioning

confidence: 94%

Section: Factors Controlling Ch 4 and Co 2 Productionmentioning

confidence: 99%

Section: Incubation Experiments and Gas (Ch 4 And Co 2 ) Analysismentioning

confidence: 99%

See 2 more Smart Citations

Biogenic methane and carbon dioxide generation in organic-rich shales from southeastern Brazil

Bertassoli

Sawakuchi

Almeida

et al. 2016

International Journal of Coal Geology

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“…Estas condições implicam que o CH4 biogênico seja gerado principalmente na zona mais rasa que 2 km de profundidade, considerando a temperatura da superfície de 20°C e gradiente geotérmico de 25-30°C/km. Embora os efeitos de fatores como a biodisponibilidade da matéria orgânica (Jones et al, 2008;Gao et al, 2013;Kruger et al, 2014;Bertassoli Jr, et al, 2016), a umidade (Reinhart & Townsend, 1997, Bertassoli Jr et al, 2016, disponibilidade de ácido acético (Bertassoli Jr, et al, 2016) ou porosidade (Gasparik et al, 2012;Liu et al, 2015) sobre a geração de CH4 biogênica já terem sido estudados, a avaliação do efeito da temperatura na geração de CH4 biogênico foi restrita ao papel da maturidade térmica da matéria orgânica (Meslé et al, 2013;Kruger et al, 2014).…”

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Influência da temperatura na geração biogênica de metano e dióxido de carbono na formação Irati, permiano da bacia do Paraná

Almeida¹

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Methane (CH4) and carbon dioxide (CO2) have great environmental and economic importance due to their contribution to the greenhouse effect and climate change, but also as energy resource, in the case of CH4. From the energy point of view, recognizing the different sources of CH4 in sedimentary basins has a crucial factor in assessing the world's natural gas reserves, since the current estimates of hydrocarbons accumulations in sedimentary basins are based on thermogenic generation of hydrocarbons. However, few studies evaluate the importance of CH4 and CO2 generation as a product of organic matter biodegradation in sedimentary basins. This issue has great relevance to improve the estimates about the geological accumulations of CH4 and CO2. Temperature is one of the most important factors affecting microbial growth and biogeochemical processes responsible for CH4 and CO2 generation in subsurface environments. In this context, the Irati Formation (Permian of the Paraná Basin) in southern of South America represents one of the most organicrich shale around the world, reaching up to 23% of total organic carbon (TOC) and covering an area of approximately 700.000 km 2. The thermal history of this important geological carbon pool is atypical because it depends not only on the burial history, but also on the emplacement of igneous bodies during the Early Cretaceous. In this study, shale samples of the Irati Formation were used in incubation experiments performed under different temperatures (22°C, 50°C, 70°C and 80°C) to evaluate the influence of thermal conditions on biogenic generation of CH4 and CO2. Higher temperatures promoted higher production rates of CH4 and CO2. Biogenic CH4 production was more efficient when shale samples were incubated at 80°C, with a maximum yield of 2.45 ml/t.d compared to 0.49 ml/t.d at 22°C, 1.75 ml/t.d at 50°C and 2.09 ml/t.d at 70°C. The same trend was observed for CO2 generated as by-product of methanogenesis. The maximum production for CO2 was observed at 80°C, reaching 23467.37 ml/t.d. The differences in CH4 and CO2 production observed for different analyzed samples seem to be related to the composition of the mineral matrix, being observed higher production in samples with higher amount of sulfur. Additionaly, organic layers of the Água de Madeiros and Vale das Fontes Formations (Lusitanian Basin), which are thermally immature and present typically marine kerogen, were also submitted to incubation experiments to evaluate CH4 and CO2 generation. Higher biogenic generation of CH4 with the elevation of temperature was also observed for the Água de Madeiros and Vale das Fontes Formations. This suggests that biogenic CH4 generation is favored by higher temperatures, at least until 80°C, independent of the thermal maturity of the substrate, pointing that the temperature window (and depth zone) for the generation of biogenic CH4 in sedimentary basins is larger than suggested in previous studies.

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Oil and Gas Shales

Horsfield¹,

Schulz²,

Bernard³

et al. 2018

Hydrocarbons, Oils and Lipids: Diversity, Origin, Chemistry and Fate

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The biogenic methane potential of European gas shale analogues: Results from incubation experiments and thermodynamic modelling

Cited by 14 publications

References 47 publications

Biogenic methane and carbon dioxide generation in organic-rich shales from southeastern Brazil

Biogenic methane and carbon dioxide generation in organic-rich shales from southeastern Brazil

Influência da temperatura na geração biogênica de metano e dióxido de carbono na formação Irati, permiano da bacia do Paraná

Oil and Gas Shales

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