A new approach on salt and methane generation

Unger, Zoltán; Leclair, David

doi:10.1190/ice2016-6355109.1

Cited by 1 publication

(6 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Transylvanian Basin hosts important gas reserves in the post-salt deposits with characteristic salt tectonics, studied by several researchers [2][3][4][5][7][8][9][10][11] . The origin of the pure methane reserves is a matter of standing debate, since the sheer amount of methane and the volume of methane production suggests the presence of a secondary gas source, in addition to the classical biogenic source [17] .…”

Section: Figure 1 Location Of the Transylvanian Basin -Romaniamentioning

confidence: 99%

“…Deep Hypersaline Anoxic Brines (DHABs) are considered to be a second source of Transylvanian biogenic methane, which could be formed in the Middle Miocene, representing analogies for the present Mediterranean DHAB [6,17] . These brines can have ~70 mg/L biogenic methane [21] .…”

Section: Figure 1 Location Of the Transylvanian Basin -Romaniamentioning

confidence: 99%

“…This allows for the presumption that the local methane could have multiple sources [17] . Besides the well-known, classical biodegradation of organic matter from the postsalt sedimentary sequence, we suppose the existence of a secondary methane source.…”

Section: The Origin Of Methane In the Transylvanian Basinmentioning

confidence: 99%

“…Besides the well-known, classical biodegradation of organic matter from the postsalt sedimentary sequence, we suppose the existence of a secondary methane source. These are the ancient Deep Hypersaline Anoxic Basins (DHAB) from the Middle Miocene in the Transylvanian Basin, where a considerable amount of methane could be produced by bacteria [6,23] .…”

Section: The Origin Of Methane In the Transylvanian Basinmentioning

confidence: 99%

“…Similar ancient brines can be considered secondary methane sources for sedimentary basins, i.e. the Miocene Transylvanian Basin [17] .…”

Section: The Origin Of Methane In the Transylvanian Basinmentioning

confidence: 99%

See 4 more Smart Citations

Investigation of Miocene Methane Hydrate Generation Potential in the Transylvanian Basin, Romania

Unger¹,

LeClair²,

Györfi³

2022

adv. in geol. and geotech. eng. res.

View full text Add to dashboard Cite

In geology we often revise theoretical models; upon finding new evidence,such as the discovery of methane hydrates, the initial model will be challenged immediately. Hereby the authors put forward two postulates:1) There is a third, previously unexplored source of methane in the Transylvanian Basin, based on a new theoretical approach on methane hydrate formation; 2) The dissociation of methane hydrates creates a strong chlorinity anomaly. Based on a recent analogy with the Black Sea basin model, we apply our statements to the Transylvanian Basin. Using direct and indirect indicators and the published system tract analysis, we claim that there are substantial grounds to believe that this model of methane hydrate formation applies to the Miocene Transylvanian Basin. Due to the increase of the geothermal gradient as a result of the volcanic activity from the Eastern Carpathians, the clathrates dissociated into methane and freshwater. This process of dilution resulted in a chlorinity anomaly that can be spotted in the formation waters of several gas fields from the Transylvanian Basin.

show abstract