Controls on generation and accumulation of blended gases (CH4/H2/He) in the Neoproterozoic Amadeus Basin, Australia

Leila, Mahmoud; Loiseau, Keanu; Moretti, Isabelle

doi:10.1016/j.marpetgeo.2022.105643

Cited by 26 publications

(11 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Resistivity and temperature analyses have indicated a potential seal between 0 and 500 m. The main issues yet to be resolved include the definition of the minimum clay content required to form an H 2 seal and the confirmation of whether a geothermal reservoir seal can be considered equivalent to an H 2 seal. So far 3 types of hydrogen reservoir seal have been described, namely the dolerite in the Mali wells (Prinzhofer et al, 2018), the clays of the Mid-Rift system in Kansas (Coveney et al, 1987;Guélard et al, 2017) and the salt layer in the Amadeus basin (Leila et al, 2022).…”

Section: Sealmentioning

confidence: 99%

Natural hydrogen potential and basaltic alteration in the Asal–Ghoubbet rift, Republic of Djibouti

Pasquet¹,

Idriss²,

Ronjon-Magand³

et al. 2023

BSGF - Earth Sci. Bull.

View full text Add to dashboard Cite

The Asal–Ghoubbet active rift in the Republic of Djibouti is a site of interest for geothermal energy and natural hydrogen, and previous studies have indicated that dihydrogen (H2) emanates from this rift. However, the well-known serpentinization reaction does not appear to be the main mechanism generating H2 at this site. Rather, the H2 is generated as follows: (1) by alteration of basaltic lava at depth via reaction with seawater flowing from Ghoubbet Bay towards Lake Asal; (2) by simple degassing of the volcanic chamber located a few kilometers below the Fiale Caldera in the rift axis; or (3) as a result of pyritization processes via the oxidation of H2S. Analysis of microorganisms did not indicate any production or consumption of H2, CO2, or CH4; therefore, it is unlikely that microorganisms affected H2 gas contents measured at the surface. However, air contamination at fumaroles is typically considerable and may limit interpretation of such processes. Drill cuttings from the Fiale 1 (F1) and Gale le Goma 1 (Glc1) wells (located on the inner and outer rift margins, respectively) were analyzed to determine where H2 is generated. Total rock analyses indicated distinct zones at depths of 464 m and 280 m for F1 and Glc1, respectively, representing the boundary between the Asal and Stratoïd Basalts. 57Fe Mössbauer analyses show a decrease in the percentage of Fe3+ at depth, indicating that Fe2+-rich material, particularly in the Stratoïd Basalts, may be a source of H2. Based on well data from the rift center and the outer rift margin, it is evident that H2 is present at the surface in the rift axis and that this area offers good remnant potential because of the presence of Fe-rich chlorite. Conversely, few H2 emissions were measured at the surface on the outer rift margins, although well data showed some H2 (~0.25%) at depth. The presence of a cap rock in the rift axis has not yet been proven; however, the high loss on ignition and the mineralogy in well Glc1 may indicate that the rocks are sufficiently altered to offer potential as a seal. If so, the rift margins would offer greater exploration potential than the rift center.

show abstract

Section: Sealmentioning

confidence: 99%

Natural hydrogen potential and basaltic alteration in the Asal–Ghoubbet rift, Republic of Djibouti

Pasquet¹,

Idriss²,

Ronjon-Magand³

et al. 2023

BSGF - Earth Sci. Bull.

View full text Add to dashboard Cite

show abstract

“…To the north-west of the Yaregskaya area at the Vodniy Promysel field, the drilling of wells from the Upper Riphean shales yielded commercial flows of dry gas (10,000-15,000 m 3 /day) containing 95.80% methane. Abroad, Precambrian accumulations and intensive HC manifestations were recorded in Australia (McArthur [30,31] and Amadeus [32] Basins), China (North China [33,34], Sichuan [35][36][37] and Tirim [38] Basins), Oman (Persian Gulf Basin [39]), India (Bikaner-Nagaur Basin [40]), as well as on the African continent (Taoudeni and Voltaian Basins [41]).…”

Section: Introductionmentioning

confidence: 99%

Assessment of Oil and Gas Potential in Vychegda Trough in Connection with the Identification of Potential Petroleum Systems

Krivoshchekov,

Botalov

2024

Geosciences

View full text Add to dashboard Cite

At present, the study of the oil and gas potential of poorly explored areas of oil and gas basins in the Russian Federation is of great importance due to the possibility of discovering large hydrocarbon accumulations in them. The Vychegda Trough in the north of the Volga–Ural basin is considered to be one of such areas. The research is devoted to the assessment of the oil and gas potential of the Vychegda Trough based on the concept of “petroleum systems”, which is widely used in oil and gas geology. A comprehensive analysis of geological and geophysical, petrophysical and geochemical data was carried out, and modern technologies for studying the oil and gas potential of sedimentary basins were applied: paleotectonic, paleogeographic reconstructions and basin modeling. The results of the research allowed us to determine a sufficiently high potential for the discovery of hydrocarbon accumulations and to identify three potential petroleum systems in the basin section: Riphean, Vendian and Devonian–Permian.

show abstract

“…The noble gases associated with this H 2 -rich gas have crustal signatures 13 , 7 . Old cratons and regions with iron-rich formations, especially the Neoproterozoic formations, are potentially prone for natural hydrogen generation 3 , 6 , 14 . In the case of the Bourakebougou field, Briere and Jerzykiewicz 15 discussed 7 theories of H 2 generation, but oxidation of Fe II -rich rocks associated to water reduction is assumed to be the main origin of H 2 .…”

Section: Introductionmentioning

confidence: 99%

Characterization of the spontaneously recharging natural hydrogen reservoirs of Bourakebougou in Mali

Maïga¹,

Deville²,

Laval³

et al. 2023

Sci Rep

View full text Add to dashboard Cite

In today’s race to find ways to produce cheap and green hydrogen, the natural hydrogen wells in Bourakebougou offer a promising solution and are a good example of how H2 can be produced in the natural environment. Not only has one well been successfully exploited to generate electricity for the local village, but twenty-four other exploratory boreholes have also demonstrated the presence of natural H2 in the surrounding area. The Bourakebougou H2 field offers a unique opportunity for geoscientists to determine the key characteristics of natural hydrogen reservoirs. This paper presents the coring, logging, and geochemistry studies that were performed to better characterize the nature of the Bourakebougou H2-bearing reservoirs. The shallowest main reservoir, in which there is the highest content of H2, is made of dolomitic carbonate (Neoproterozoic cap carbonate). These carbonates are largely karstified and show a high degree of heterogeneity in porosity (0.21–14.32%). Based on the analysis of the drilling imagery of the carbonated reservoirs, the accumulation of hydrogen occurs in the karst (void) representing a secondary porosity in the rock matrix. Other reservoirs, especially the deepest ones, are porous sandstone rocks with much more homogeneous porosities (4.52–6.37%) compared to the massive carbonates. For the wells analysed, the neutron tool reacted in a specific way when there is the presence of hydrogen. Hence, it stands out as being the primary tool to detect the presence of natural hydrogen beyond simple gas logging. When comparing a H2 reservoir system to classical oil and gas reservoir systems, the results show that the hydrogen reservoir is a dynamic system that is progressively recharged in H2-rich gas at the production timescale.

show abstract

Controls on generation and accumulation of blended gases (CH4/H2/He) in the Neoproterozoic Amadeus Basin, Australia

Cited by 26 publications

References 45 publications

Natural hydrogen potential and basaltic alteration in the Asal–Ghoubbet rift, Republic of Djibouti

Natural hydrogen potential and basaltic alteration in the Asal–Ghoubbet rift, Republic of Djibouti

Assessment of Oil and Gas Potential in Vychegda Trough in Connection with the Identification of Potential Petroleum Systems

Characterization of the spontaneously recharging natural hydrogen reservoirs of Bourakebougou in Mali

Contact Info

Product

Resources

About