Diagenetic evolution of the Ansian–Pliensbachian Adigrat Sandstone, Blue Nile Basin, Ethiopia

Wolela, A.

doi:10.1016/j.jafrearsci.2009.05.005

Cited by 21 publications

(18 citation statements)

References 52 publications

(50 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The sand stone beds are mod er ately to well sorted with rounded to sub-rounded grains. This in di cates that the sand stone beds could sup port gas or wa ter re sources in the Narra been Group (Wolela, 2009). The in flu ence of diagenetic al ter ation on res ervoir qual ity can af fect hy dro car bon oc cur rences in sand stone beds.…”

Section: Reservoir Potential Of the Southern Sydney Basinmentioning

confidence: 87%

“…Thus, the dis so lu tion of de tri tal 620 Fahad Al Gahtani K-feld spar is the main or i gin of authigenic K-feld spar (cf. Wolela, 2009). Fac tors that con trib ute to K-feld spar pre cip i tation in clude high sil ica ac tiv i ties and high K + /H + ra tios as in dicated by .…”

Section: Ta Blementioning

confidence: 97%

“…The amount of po ros ity re duced by me chan i cal and chem i cal com pac tion in the Narra been Group is sim i lar to that in the Illa warra Coal Mea sures and these losses are not un re cov er able (cf. Wolela, 2009). Pseudomatrix oc curs as re sult of me chan i cal com pac tion and fills both small and large pores, thus fur ther re duc ing po ros ity as shown 622 Fahad Al Gahtani by El-Ghali et al (2009).…”

Section: Influence Of Diagenetic Alteration and Composition On Reservmentioning

confidence: 99%

“…They have low to mod er ate thin sec tion po ros ity which is higher in the Bulgo Sand stone than in the Coal cliff Sand stone and Scarborough Sand stone. Thus, these for ma tions are poor to mod erate res er voirs and prob a bly con tain gas or wa ter (Wolela, 2009). Also, Mullard (1995) in di cated that these for ma tions could be hydro car bon res er voirs in the Narra been Group.…”

Section: Reservoir Potential Of the Southern Sydney Basinmentioning

confidence: 99%

“…Mi nor sec ond ary po ros ity oc curs as a result of dis so lu tion of grains and may pro vide some pore spaces for gas or wa ter in the me dium-and coarse-grained sand stone. In the Adigrat Sand stone, Wolela (2009) showed that me dium-to coarse-grained sand stone can be po rous and per me able and may be char ac ter ized by the pres ence of oil and gas. Well logs showed the pres ence of po ros ity in the me dium-to coarsegrained sand stone in this study.…”

Section: Reservoir Potential Of the Southern Sydney Basinmentioning

confidence: 99%

See 4 more Smart Citations

The influence of diagenetic alterations on porosity in the Triassic Narrabeen Group, Southern Sydney Basin, Australia

Gahtani¹

2013

View full text Add to dashboard Cite

The in flu ence of diagenetic al ter ations on po ros ity in the Tri as sic Narra been Group, South ern Syd ney Ba sin, Aus tra lia Pe trog ra phy of the Tri as sic Narra been Group (South ern Syd ney Ba sin of Aus tra lia) was de scribed by thin sec tion, scan ning elec tron mi cro scope and X-ray dif frac tion tech niques. Sand stone com po si tion in cludes mostly lithic grains with mi nor quartz, feld spar, mica and heavy min er als; litharenites and sublitharenites are com mon and quartzarenites are rare. Quartz in cludes monocrystalline and polycrystalline grains while the feld spar in cludes both K-feld spar and plagioclase. Vol ca nic, sed i mentary and chert rock frag ments are pres ent. In thin sec tion po ros ity is vis i ble in all units, par tic u larly the coarse-grained de posits. Sec ond ary po ros ity is greater than the pri mary po ros ity. The diagenetic al ter ations in clude com pac tion, quartz overgrowths, authigenic clay min er als, car bon ate ce ment and authigenic feld spar. Com pac tion oc curred in all units dur ing diagenesis. Both early and late diagenetic car bon ate ce ment is im por tant in the Narra been Group. Pore-fill ing car bon ate cement re duced po ros ity whereas dis so lu tion of car bon ate re sulted in sec ond ary po ros ity. Authigenic clay min er als are widespread in all units fill ing pores and oc cur ring as grain-coat ings on de tri tal and authigenic grains. Where they coat quartz grains they pre serve po ros ity by pre vent ing growth of quartz overgrowths. Dis so lu tion of un sta ble feld spar and lithic grains pro vided sec ond ary po ros ity. In the Narra been Group, shale and siltstone are abun dant in the Wom barra Claystone, Stanwell Park Claystone, Bald Hill Claystone and New port For ma tion, form ing lithological seals and con fin ing lay ers. Mi nor sandstone beds oc cur in the Wom barra Claystone and con tain more po ros ity. Me dium-and coarse-grained sand stone is com mon in the Coal cliff Sand stone, Scarborough Sand stone and Bulgo Sand stone and shows low to mod er ate po ros ity. Thus, these sand stone units prob a bly con tain gas or wa ter.Key words: pe trog ra phy, diagenesis, pri mary po ros ity, sec ond ary po ros ity, quartz over growth, car bon ate ce ment. INTRODUCTIONIn the Syd ney Ba sin (Aus tra lia), the Narra been Group is the low er most of three Tri as sic rock units and is lo cated be tween the Up per Perm ian Illa warra Coal Mea sures and the Hawkesbury Sand stone (Ward, 1971a). Fine-grained sed i ment in the Narra been Group was pre vi ously stud ied by sev eral authors (e.g., Baker, 1956;Loughnan et al., 1964Loughnan et al., , 1974Goldbery and Hol land, 1973;Retallack, 1977). Ward (1972) noted quartzose, quartz-lithic and vol ca nic sand stones as the three sed i ment suites in the Narra been Group. Prov e nance mark ers of fore land ba sin-fill sed i ments were de ter mined by Cow an (1993). The com po si tion and tex ture of the Narra been Group were de scribed by McElroy (1954). De scrip tions of the pe trology in the N...

show abstract

Section: Reservoir Potential Of the Southern Sydney Basinmentioning

confidence: 87%

Section: Ta Blementioning

confidence: 97%

Section: Influence Of Diagenetic Alteration and Composition On Reservmentioning

confidence: 99%

Section: Reservoir Potential Of the Southern Sydney Basinmentioning

confidence: 99%

Section: Reservoir Potential Of the Southern Sydney Basinmentioning

confidence: 99%

See 3 more Smart Citations

The influence of diagenetic alterations on porosity in the Triassic Narrabeen Group, Southern Sydney Basin, Australia

Gahtani¹

2013

View full text Add to dashboard Cite

show abstract

CO₂ mineralization in volcanogenic sandstones: geochemical characterization of the Etchegoin formation, San Joaquin Basin

et al. 2015

View full text Add to dashboard Cite

Volcanogenic sandstones are typically rich in volcanic rock fragments that can provide reactive minerals for CO 2 mineralization in a scenario of CO 2 sequestration. To quantitatively evaluate the extent and time scale of CO 2 mineralization in potential reservoir formations, we characterized example high-porosity volcanic sand from the San Joaquin Valley of southern Central California. Samples were collected from the volcanic-rich members of the Etchegoin Formation in the San Joaquin Basin near Coalinga, California. Thin sections made from these samples were examined under petrographic microscope to identify mineral compositions, and then scanning electron microscopy (SEM) and energy dispersive x-ray spectroscopy (EDX) were used to gather quantitative information on mineral abundances, distribution, and reactive surface areas. Porosity and permeability were also measured using core plugs made from outcrop samples. Results show that the Etchegoin volcanic sandstone has a high percentage (10-15%) of reactive minerals (pyroxenes, Fe-Ti spinel and clays), and high reactive surface areas at about 1 m 2 /kg. Reactive transport modeling is conducted and shows that these reactive minerals could mineralize 92% of injected and capillary-trapped CO 2 within 1000 years of injection. Possible effects of heterogeneity on CO 2 injection and mineralization are also studied using the reactive transport code TOUGHREACT. Vertical heterogeneity of mineralogy and hydrology increases both CO 2 injectivity and mineralization. Available volcanogenic sandstones worldwide like the Etchegoin sandstone are summarized from the literature, with formations from the western USA that have CO 2 sequestration potential emphasized.

show abstract

Upper Jurassic (Oxfordian—Kimmeridgian) Benthic Foraminifera and Algae from the Blue Nile Basin, Ethiopia

Domenico

2023

Advances in Science, Technology &Amp; Innovation

View full text Add to dashboard Cite

Diagenetic evolution of the Ansian–Pliensbachian Adigrat Sandstone, Blue Nile Basin, Ethiopia

Cited by 21 publications

References 52 publications

The influence of diagenetic alterations on porosity in the Triassic Narrabeen Group, Southern Sydney Basin, Australia

The influence of diagenetic alterations on porosity in the Triassic Narrabeen Group, Southern Sydney Basin, Australia

CO₂ mineralization in volcanogenic sandstones: geochemical characterization of the Etchegoin formation, San Joaquin Basin

Upper Jurassic (Oxfordian—Kimmeridgian) Benthic Foraminifera and Algae from the Blue Nile Basin, Ethiopia

Contact Info

Product

Resources

About

Diagenetic evolution of the Ansian–Pliensbachian Adigrat Sandstone, Blue Nile Basin, Ethiopia

Cited by 21 publications

References 52 publications

The influence of diagenetic alterations on porosity in the Triassic Narrabeen Group, Southern Sydney Basin, Australia

The influence of diagenetic alterations on porosity in the Triassic Narrabeen Group, Southern Sydney Basin, Australia

CO2 mineralization in volcanogenic sandstones: geochemical characterization of the Etchegoin formation, San Joaquin Basin

Upper Jurassic (Oxfordian—Kimmeridgian) Benthic Foraminifera and Algae from the Blue Nile Basin, Ethiopia

Contact Info

Product

Resources

About

CO₂ mineralization in volcanogenic sandstones: geochemical characterization of the Etchegoin formation, San Joaquin Basin