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Dhruma Formation

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Journal Article
Published: 30 July 2021
Journal of Sedimentary Research (2021) 91 (7): 773–794.
... succession, the Middle Jurassic Dhruma Formation, Saudi Arabia. The study achieves the following: i) it examines and demonstrates sedimentary relationships between various fluvial, nearshore, and shallow-marine deposits, ii) it develops depositional models to account for the stratigraphic complexity inherent...
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Summary of lithofacies observed in the lower <b>Dhruma</b> <b>Formation</b>.
Published: 30 July 2021
Table 1.— Summary of lithofacies observed in the lower Dhruma Formation.
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Core descriptions from <b>Dhruma</b> <b>Formation</b> wells in the Rub&#x27; Al-Khali; see  Fi...
Published: 01 May 2016
Figure 11. Core descriptions from Dhruma Formation wells in the Rub' Al-Khali; see Figure 6 for the position of these cores in a well correlation: (A) Well C and (B) Well D. Gamma ray logs are wireline. The bioturbation index (BI) is a qualitative estimate from core observations and is a proxy
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Scanning electron microscope images of the lower <b>Dhruma</b> <b>Formation</b> clastics....
Published: 01 May 2016
Figure 12. Scanning electron microscope images of the lower Dhruma Formation clastics. (A) Well-sorted quartz arenite from Well C. Syntaxial quartz overgrowths have inhibited compaction and reduced pore system rugosity. (B) Fine-grained quartz sandstone from the Kashm Al-Khalta outcrop, lower
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Thin coal seam surrounded by rooted, chamositic sandstone, <b>Dhruma</b> <b>Formation</b>...
Published: 01 May 2016
Figure 13. Thin coal seam surrounded by rooted, chamositic sandstone, Dhruma Formation conventional core, Rub' Al-Khali. Coin is 26 mm (1 in.) in diameter.
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Naturally weathered beds of the Hisyan Member of the <b>Dhruma</b> <b>Formation</b> expos...
Published: 01 July 2004
Figure 3: Naturally weathered beds of the Hisyan Member of the Dhruma Formation exposed alongside the intersection between the Riyadh-Mecca road and that leading to Buraydah, west of the Tuwaiq Mountain escarpment.
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<b>DHRUMA</b> <b>FORMATION</b> ISOPACH
Published: 01 January 1997
Figure 8: DHRUMA FORMATION ISOPACH
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—Carbonate ramp (<b>Dhruma</b> <b>Formation</b>) versus differentiated shelf (Tuwaiq-Hith...
Published: 01 May 1980
FIG. 2 —Carbonate ramp (Dhruma Formation) versus differentiated shelf (Tuwaiq-Hith Formations), Qatar area.
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Middle to Upper Jurassic calcareous nannofossils from core samples in onsho...
Published: 01 October 2015
, 14,323.20 ft, Sargelu Formation; (2) Discorhabdus criotus , XPL, Well B, 14,323.20 ft, Sargelu Formation; (3) Discorhabdus criotus , XPL, Well C, 13,808.00 ft, Sargelu Formation; (4) Discorhabdus criotus , XPL, Well B, 14,311.70 ft, Sargelu-Dhruma Transition; (5) Discorhabdus striatus , XPL
Journal Article
Journal: GeoArabia
Publisher: Gulf Petrolink
Published: 01 April 2015
GeoArabia (2015) 20 (2): 79–110.
... of the Middle Jurassic Dhruma Formation to the base of the Upper Jurassic Arab Formation, though the principal focus was on the intervening Hanifa and Tuwaiq Mountain formations where potential unconventional hydrocarbon reservoirs have been encountered. The principal objective of the study was to produce...
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Journal Article
Journal: GeoArabia
Publisher: Gulf Petrolink
Published: 01 January 2009
GeoArabia (2009) 14 (1): 17–52.
... authors based on their admittedly lithostratigraphic correlation with marine strata of the Dhruma Formation. The Early Bathonian age is consistent with the alternative interpretation, which correlates the “delta” with the discontinuity in the marine sequence between units D5 and D6 of the Dhruma Formation...
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Journal Article
Journal: GeoArabia
Publisher: Gulf Petrolink
Published: 01 April 2009
GeoArabia (2009) 14 (2): 145–186.
... the Minjur Sandstone from the Toarcian Marrat Formation of the Jurassic Shaqra’ Group. The Shaqra’ Group consists of seven formations, from base-up: (1) Marrat Formation consisting of the Lower, Middle and Upper units, here ranked as members. (2) Dhruma Formation consisting of eight units (D1–D5, Wadi ad...
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Journal Article
Journal: AAPG Bulletin
Published: 01 August 1986
AAPG Bulletin (1986) 70 (8): 977–1002.
... with the greatest facies variations occurring in the post-Dhruma to Arab “D” rocks. Some of the best and most extensive reservoirs of the area occur in the primary and secondary porosity of the Upper Jurassic Arab Formation, and in the Middle Jurassic Araej and Dhruma Formations of Saudi Arabia, Qatar, and Abu...
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Middle to Upper Jurassic calcareous nannofossils identified from core sampl...
Published: 01 October 2015
, 10,228.00 ft, Najmah Shale Member; (2) Ansulasphaera helvetica , XPL, Well K, 10,579.50 ft, Najmah Shale Member; (3) Ansulasphaera helvetica , XPL, Well K, 10,579.50 ft, Najmah Shale Member; (4) Biscutum novum , XPL, Well V, 10,531.00 ft, Dhruma Formation; (5) Biscutum novum , XPL, Well B, 14,371.50
Journal Article
Journal: GeoArabia
Publisher: Gulf Petrolink
Published: 01 October 1997
GeoArabia (1997) 2 (4): 361–382.
...) The late Toarcian and Aalenian correspond to a substantial sea- level lowstand and a regional depositional hiatus. (4) The Middle Jurassic Dhruma Formation corresponds to four different sequences with a major intervening hiatus. The Upper Dhruma Member, together with the Tuwaiq Mountain form the topmost...
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Journal Article
Journal: GeoArabia
Publisher: Gulf Petrolink
Published: 01 October 2015
GeoArabia (2015) 20 (4): 125–180.
..., 14,323.20 ft, Sargelu Formation; (2) Discorhabdus criotus , XPL, Well B, 14,323.20 ft, Sargelu Formation; (3) Discorhabdus criotus , XPL, Well C, 13,808.00 ft, Sargelu Formation; (4) Discorhabdus criotus , XPL, Well B, 14,311.70 ft, Sargelu-Dhruma Transition; (5) Discorhabdus striatus , XPL...
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Series: SEPM Special Publication, SEPM Special Publication
Published: 01 January 2009
DOI: 10.2110/sepmsp.093.127
EISBN: 9781565762978
... succession is composed of the Lower Jurassic Marrat Formation, the Middle Jurassic Dhruma and Tuwaiq Mountain formations, and the Upper Jurassic Hanifa, Jubaila, and Arab formations, which terminate with a succession of interbedded carbonates and evaporites of which the final thick evaporite is termed...
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Lithostratigraphy of the Minjur and <b>Dhruma</b> <b>Formations</b>, east of the Haushi s...
Published: 01 October 2011
Figure 4: Lithostratigraphy of the Minjur and Dhruma Formations, east of the Haushi structural complex (Mafraq quadrangle, Sheet NF 40-11). Adapted from Roger et al. (1992) .
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Middle to Upper Jurassic calcareous nannofossils from core samples in onsho...
Published: 01 October 2015
-Dhruma Transition; (2) Schizosphaerella punctulata , XPL, Well B, 14,330.75 ft, Dhruma Formation; (3) Schizosphaerella punctulata , XPL, Well B, 14,386.90 ft, Dhruma Formation; (4) Schizosphaerella punctulata , XPL, Well B, 14,358.50 ft, Dhruma Formation; (5) Schizosphaerella punctulata
Journal Article
Journal: GeoArabia
Publisher: Gulf Petrolink
Published: 01 July 2004
GeoArabia (2004) 9 (3): 79–114.
...Figure 3: Naturally weathered beds of the Hisyan Member of the Dhruma Formation exposed alongside the intersection between the Riyadh-Mecca road and that leading to Buraydah, west of the Tuwaiq Mountain escarpment. ...
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