Methane released from groundwater: the source of natural gas accumulations in northern West Siberia

Cramer, Bernhard; Poelchau, H. S.; Gerling, P.; Лопатин, Н.В.; Littke, Ralf

doi:10.1016/s0264-8172(98)00085-3

Cited by 78 publications

(33 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This finding is also consistent with our hypothesis because CH 4 in natural gas is even more depleted in D/H than gasoline, e.g. δD equals −190‰ to −220‰ vs. VSMOW for natural gas of Russian origin (Cramer et al, 1999), which accounts for a significant fraction of the European pipeline natural gas mixture from which the CH 4 in our experiment was extracted.…”

Section: H 2 Isotope Equilibration With H 2 Osupporting

confidence: 92%

Molecular hydrogen (H2) emissions and their isotopic signatures (H/D) from a motor vehicle: implications on atmospheric H2

et al. 2010

View full text Add to dashboard Cite

Abstract. Molecular hydrogen (H 2 ), its isotopic signature (deuterium/hydrogen, δD), carbon monoxide (CO), and other compounds were studied in the exhaust of a passenger car engine fuelled with gasoline or methane and run under variable air-fuel ratios and operating modes. H 2 and CO concentrations were largely reduced downstream of the three-way catalytic converter (TWC) compared to levels upstream, and showed a strong dependence on the air-fuel ratio (expressed as lambda, λ). The isotopic composition of H 2 ranged from δD=−140‰ to δD = −195‰ upstream of the TWC but these values decreased to −270‰ to −370‰ after passing through the TWC. Post-TWC δD values for the fuelrich range showed a strong dependence on TWC temperature with more negative δD for lower temperatures. These effects are attributed to a rapid temperature-dependent H-D isotope equilibration between H 2 and water (H 2 O). In addition, post TWC δD in H 2 showed a strong dependence on the fraction of removed H 2 , suggesting isotopic enrichment during catalytic removal of H 2 with enrichment factors (ε) ranging from −39.8‰ to −15.5‰ depending on the operating mode. Our results imply that there may be considerable variability in real-world δD emissions from vehicle exhaust, which may mainly depend on TWC technology and exhaust temperature regime. This variability is suggestive of a δD from traffic that varies over time, by season, and by geographical location. An earlier-derived integrated pure (end-member) δD from anthropogenic activities of −270‰ (Rahn et al., 2002) Correspondence to: M. K. Vollmer (martin.vollmer@empa.ch) can be explained as a mixture of mainly vehicle emissions from cold starts and fully functional TWCs, but enhanced δD values by >50‰ are likely for regions where TWC technology is not fully implemented. Our results also suggest that a full hydrogen isotope analysis on fuel and exhaust gas may greatly aid at understanding process-level reactions in the exhaust gas, in particular in the TWC.

show abstract

Section: H 2 Isotope Equilibration With H 2 Osupporting

confidence: 92%

Molecular hydrogen (H2) emissions and their isotopic signatures (H/D) from a motor vehicle: implications on atmospheric H2

et al. 2010

View full text Add to dashboard Cite

show abstract

“…Such uplift movements may have a strong effect on the petroleum systems by changing the temperature and decreasing the pore pressure within the sediments. The most important effect of uplift on hydrocarbon distribution is the release of formerly dissolved gas from the pore water leading to new accumulations of natural gas (Cramer et al, 1999(Cramer et al, , 2001.…”

Section: Influence Of Cyclic Glaciations On Petroleum Systemsmentioning

confidence: 99%

pT-effects of Pleistocene glacial periods on permafrost, gas hydrate stability zones and reservoir of the Mittelplate oil field, northern Germany

Grassmann

Cramer

Delisle

et al. 2010

Marine and Petroleum Geology

Self Cite

View full text Add to dashboard Cite

“…The Kela 2 gas field, the main supplying field for Gas Transportation Project, is considered to be a water-dissolved origin [19,20] . In northern West Siberia, Cramer et al think that the gas is related to the water-soluble gas [21] . So the water-soluble gases are ubiquitous in nature and have not been sufficiently regarded.…”

Section: The Water-soluble Gas In Naturementioning

confidence: 99%

The mechanism of the flowing ground water impacting on coalbed gas content

et al. 2005

View full text Add to dashboard Cite

The hydrogeological condition affects the coalbed gas storage dramatically. In an area of stronger hydrodynamics, the coal has a lower gas content, while a higher gas content exists in an area of weaker hydrodynamics. Obviously, the flowing groundwater is harmful to coalbed gas preservation. But few researches focus on the mechanism of how the flowing water diminishes the coalbed gas content. Based on the phenomenon that the flowing groundwater not only makes coalbed gas content lower, but also fractionates the carbon isotope, this research puts forward an idea that it is the water solution that diminishes the coalbed gas content, rather than the water-driven action or the gas dissipation through cap rocks. Only water-soluble action can both fractionate the carbon isotope and lessen the coalbed gas content, and it is an efficient way to take gas away and affect the gas content.

show abstract

Methane released from groundwater: the source of natural gas accumulations in northern West Siberia

Cited by 78 publications

References 7 publications

Molecular hydrogen (H<sub>2</sub>) emissions and their isotopic signatures (H/D) from a motor vehicle: implications on atmospheric H<sub>2</sub>

Molecular hydrogen (H<sub>2</sub>) emissions and their isotopic signatures (H/D) from a motor vehicle: implications on atmospheric H<sub>2</sub>

pT-effects of Pleistocene glacial periods on permafrost, gas hydrate stability zones and reservoir of the Mittelplate oil field, northern Germany

The mechanism of the flowing ground water impacting on coalbed gas content

Contact Info

Product

Resources

About

Methane released from groundwater: the source of natural gas accumulations in northern West Siberia

Cited by 78 publications

References 7 publications

Molecular hydrogen (H&lt;sub&gt;2&lt;/sub&gt;) emissions and their isotopic signatures (H/D) from a motor vehicle: implications on atmospheric H&lt;sub&gt;2&lt;/sub&gt;

Molecular hydrogen (H&lt;sub&gt;2&lt;/sub&gt;) emissions and their isotopic signatures (H/D) from a motor vehicle: implications on atmospheric H&lt;sub&gt;2&lt;/sub&gt;

pT-effects of Pleistocene glacial periods on permafrost, gas hydrate stability zones and reservoir of the Mittelplate oil field, northern Germany

The mechanism of the flowing ground water impacting on coalbed gas content

Contact Info

Product

Resources

About

Molecular hydrogen (H<sub>2</sub>) emissions and their isotopic signatures (H/D) from a motor vehicle: implications on atmospheric H<sub>2</sub>

Molecular hydrogen (H<sub>2</sub>) emissions and their isotopic signatures (H/D) from a motor vehicle: implications on atmospheric H<sub>2</sub>