Search results

• Maps of hydrocarbon types: Gulf of Mexico example
  | Lower [[Tertiary]] (centered on [[Eocene]], ~50-40 Ma) | [[Upper Cretaceous]] (centered on [[Turonian]], ~85-95 Ma)
  5 KB (633 words) - 20:02, 18 February 2022
• Chronostratigraphy
  ...nd: #00CCFF" | [[Mesozoic]] || rowspan="2" style="background: #71BC78" | [[Cretaceous]] || style="background: #71BC78"| Upper | style="background: #71BC78" | Lower
  3 KB (354 words) - 18:34, 14 March 2019
• Mowry Shale, Powder River Basin, Wyoming
  ...s in thickness from 150 to 250 ft and is a significant source rock for the Cretaceous reservoirs in the Powder River Basin.
  4 KB (677 words) - 17:14, 22 December 2023
• Botucatu Formation
  The paleowind regimes show a monsoonal pattern during the Jurassic and Cretaceous, the main winds blew to the NE during the Southern Hemisphere winter and to
  3 KB (432 words) - 17:54, 22 March 2019
• Guará Formation
  ...nd facies architecture of eolian-fluvial strata of the Late Jurassic–Early Cretaceous Guará Formation, Southern Brazil: Sedimentology, v. 52, p. 1323-1341.</ref ...tu Formation (Lower Cretaceous), and underlying Sanga do Cabral Formation (Lower Triassic; [[:file:Guara_02.jpg|Figure 2]]).
  6 KB (856 words) - 19:51, 2 April 2019
• Cuba: Geology and regional setting
  ...s (including remarkable [[Paleogene]] [[orbitoid]]s), the gigantic Upper [[Cretaceous]] [[rudistid]]s, the spectacular [[limestone]] Mogotes of Pinar del Rio, th ...[[plate]]s. As a consequence, Cuba exposes sequences of Upper Jurassic and Cretaceous nonvolcanic pelagic sediments that are rare, if not unique, in the Caribbea
  13 KB (1,851 words) - 20:43, 7 July 2016
• Procedure for geometrical analysis
  ...Piombino, 1994, Giant proximal foreland basin non-marine wedge trap: Lower Cretaceous Cutbank Sandstone, Montana, in J. C. Dolson, M. L. Hendricks, and W. A. Wes ...example of calibrating unconformity evidence from cores to logs. The Lower Cretaceous Cutbank Sandstone unconformably overlies the Jurassic Swift Formation. A ma
  6 KB (862 words) - 15:20, 4 February 2022
• Tuscaloosa Marine Shale, Gulf Coast Basin, Louisiana and Mississippi
  The Upper Cretaceous Tuscaloosa marine shale (TMS) continues to be a minor and largely undevelop ...ied that the maximum flooding surface occurs in the middle of the TMS; the lower portion of the TMS is associated with transgression and maximum flooding wh
  7 KB (1,007 words) - 21:15, 3 March 2022
• Oil correlation case history: Brazilian offshore basins
  ...e basins, the product of rifting of Africa from South America in the Early Cretaceous, contain several source units representing depositional settings ranging fr ...sulfur, higher vanadium-nickel, less negative δ¹³C ratios, and lower wax contents (see Figure 8-49). Sterane concentrations are high, as are con
  8 KB (1,086 words) - 22:16, 15 February 2022
• Mancos Shale Play in New Mexico
  ...re1MancosCommRept.jpg|300px|thumb|{{figure number|1}}Type logs through the Cretaceous section of the San Juan Basin, showing the principle stratigraphic units. N ...[[:file:Figure1MancosCommRept.jpg|Figure 1]] shows a type log through the Cretaceous section of the San Juan Basin.
  6 KB (985 words) - 20:14, 2 June 2021
• Siliceous microfossils
  ...rine environments. Marine diatoms range from [[Upper Jurassic]] or [[Lower Cretaceous]] to [[Holocene]] and are particularly useful for age and environmental det ...]; they commonly occur with diatoms. Silicoflagellates range in age from [[Cretaceous]] to [[Holocene]]. Although not as common as diatoms, they are useful time
  5 KB (626 words) - 15:18, 31 January 2022
• Austin Chalk, onshore U.S. Gulf Coast
  ...ractured fault zones (these major fractures oriented parallel to the Lower Cretaceous shelf edge and are linked to underlying tectonic structures), such as the l ...dated the assessment on undiscovered, recoverable oil and gas in the Upper Cretaceous system of the Gulf Coast, including the Austin Chalk and the coequal Tokio
  8 KB (1,200 words) - 21:22, 3 March 2022
• Basin-centered gas systems: historical development and classification
  ...logic reports confirming this assumption. Nuclear detonations conducted in Cretaceous rocks in the San Juan and Piceance basins of New Mexico and Colorado were u ...n River basin-a developing giant gas supply from deep, overpressured Upper Cretaceous sandstones]: AAPG Bulletin, v. 65, p. 1078-1098.</ref> in the Great Divide
  9 KB (1,373 words) - 13:40, 10 March 2015
• Mandal-Ekofisk(!) petroleum system
  ...Based on geochemical evidence, the Upper Jurassic (Kimmeridgian) to Lower Cretaceous source rock is the Mandal Formation. A positive oil-source rock correlation ...shows the vertical migration path from the active source rock through the Cretaceous rocks and horizontally along the basal Paleogene reservoir rocks until it [
  9 KB (1,184 words) - 18:46, 3 March 2016
• Molyneux:sandbox
  * [[Cretaceous]] * [[Lower Cretaceous]]
  5 KB (543 words) - 23:45, 8 January 2015
• Austin Chalk, Tokio, and Eutaw Formations, U.S. Onshore Gulf Coast (USGS)
  ...on of undiscovered conventional and continuous oil and gas resources—Upper Cretaceous Austin Chalk, U.S. Gulf Coast: U.S. Geological Survey Scientific Investigat ...t al., 2020, Assessment of undiscovered oil and gas resources in the Upper Cretaceous Austin Chalk and Tokio and Eutaw Formations, U.S. Gulf Coast, 2019: U.S. Ge
  6 KB (846 words) - 20:58, 6 April 2021
• Basin-centered gas systems: global distribution
  | Colville basin, Alaska || High || [[Cretaceous]] || Direct ? || Popov et al.<ref name=Popovetal_2001>Popov, M. A., V. F. N | Alberta basin, Canada || High || Cretaceous || Direct || Masters<ref name=Masters_1979>Masters, J. A., 1979, [http://ar
  27 KB (3,753 words) - 14:53, 12 March 2019
• Mapping unconformities
  ...olson, J. C., and D. S. Muller, 1994, Stratigraphic evolution of the Lower Cretaceous Dakota Group, Western Interior, USA, in M. V. Caputo, J. A. Peterson, and K The Lower Cretaceous Cutbank Sandstone is the largest valley-fill trap in the Rocky Mountains (1
  7 KB (977 words) - 20:39, 4 February 2022
• Basin-centered gas systems: examples
  ...genesis, and the formation of abnormally pressured gas compartments in the Cretaceous of the Greater Green River basin: A geochemical model, ''in'' B. Strook and ...ata/specpubs/mem67/ch12/ch12.htm Anomalously pressured gas compartments in Cretaceous rocks of the Laramide basins of Wyoming: A new class of hydrocarbon accumul
  25 KB (3,445 words) - 19:01, 14 March 2016
• China Shale Gas & Liquids - Songliao and Junggar Basins
  ...y found in these basins. Organic-rich shales are mainly distributed in the Lower Permian Fengcheng Formation in the Mahu Sag, the Middle Permian Lucaogou Fo ...rmation, Lucaogou Formation, and Wutonggou Formation), Triassic, Jurassic, Cretaceous, Tertiary, and Quaternary from the bottom to the top<ref name=Kng2012 />. T
  6 KB (850 words) - 17:56, 20 December 2023
• Parana-Etendeka CBP
  ...ory. It's characterized by a fissural volcanism that occurred in the Early Cretaceous before the Gondwana rift and opening of South Atlantic Ocean. About 90% of ...contents: The first group occurs dominantly in southern areas and has TiO2 lower than 2 wt.%, the second group has high TiO2 (>2%) and is dominant in the no
  6 KB (922 words) - 19:45, 11 April 2019
• Tethys region
  ...the southeastern part of the Levantine Basin, the Mango well tested Lower Cretaceous sands (10,000 bo/d); these sands are likely charged from Jurassic source ro Although Jurassic and Cretaceous source rocks are very important for the Tethyan region, there are other reg
  23 KB (3,325 words) - 14:52, 1 August 2016
• Basin-centered gas systems: elements and processes
  ...ontained in coal beds and carbonaceous shale in several coal-bearing Upper Cretaceous intervals. The relative contribution of gas to basin-centered gas accumulat ...An assessment of gas resources in low-permeability sandstones of the Upper Cretaceous Mesaverde Group, Piceance basin, Colorado]: U.S. Geological Survey Open-Fil
  20 KB (2,949 words) - 18:24, 6 April 2016
• Basin-centered gas systems: development
  ...s of some typical western interior basins in non-marine Tertiary and Upper Cretaceous source rocks and the occurrence of oil and gas in the west central U.S.:Roc ...An assessment of gas resources in low-permeability sandstones of the Upper Cretaceous Mesaverde Group, Piceance basin, Colorado]: U.S. Geological Survey Open-Fil
  34 KB (4,772 words) - 14:44, 12 March 2019
• Iraq petroleum geology
  ...rocks of the Upper Cretaceous above the Mishrif Formation and in the Lower Cretaceous below the Zubair Formation. Smaller reserves occur in other Neogene and Pal ...ldbelt. Lesser amounts of oil and gas are derived from: 1) Upper and Lower Cretaceous oil-prone source rocks within the Zagros foldbelt; 2) Triassic oil-prone so
  78 KB (7,926 words) - 16:25, 30 January 2017
• East Breaks source rock
  ...c development of the Texas margin: a new integrated cross-section from the Cretaceous shelf edge to the Perdido fold belt: Selected Papers, Gulf Coast Section SE ...[[crude oil]] in the upper Paleocene to lower Eocene Wilcox Formation. If lower Tertiary Wilcox equivalent or uppermost Jurassic mudstones are the source f
  7 KB (1,080 words) - 17:44, 23 March 2022
• Braided fluvial reservoirs
  ...Courtesy of the [http://www.earthobservatory.nasa.gov NASA Web site]. The lower figure was modified from Cant.<ref name=Cant_1982>Cant, D. J., 1982, [http: ...of reservoirs originating in low and high sinuosity channel systems, Lower Cretaceous Travis Peak Formation, east Texas, U.S.A., in C. P. North and D. J. Prosser
  13 KB (1,859 words) - 21:29, 12 March 2019
• Petrophysical analysis of lithofacies
  ...parasequences at relative highstand. Microporous dolomites comprising the lower portions of the parasequences have poor reservoir characteristics, despite ...from [[sequence stratigraphy]] alone. Within channel systems of the Lower Cretaceous Mannville Group (Alberta, Canada), fluids distributions may be complex. Hig
  6 KB (763 words) - 18:53, 4 February 2022
• Basin-centered gas systems: gas resources
  ...essment of in-place gas resources in low-permeability Upper Cretaceous and lower Tertiary sandstone reservoirs, Wind River basin, Wyoming: U.S. Geological S
  9 KB (1,242 words) - 15:47, 11 March 2015
• Quartz
  Apatite: Normally lower birefringence, has a higher relief and is uniaxial (-). ...ce similar to quartz, but barite has slightly higher relief and gypsum has lower relief; both gypsum and barite have strong cleavage.
  8 KB (1,127 words) - 20:21, 23 January 2019
• China Shale Gas & Liquids - Sichuan Basin
  ...one (Lu et al., 2020). The commercial gas production is typically from the lower part of Wufeng-Longmaxi Formation that is dominated by black siliceous muds After the maximum burial in the Jurassic-Cretaceous stage, the Wufeng-Longmaxi shale has experienced multiple tectonic uplifts,
  7 KB (985 words) - 18:54, 4 December 2023
• Paleontology
  ...Concretion22.jpg|thumb|400px|A broken concretion with fossils inside; Late Cretaceous Pierre shale, near Ekalaka, Montana. Photograph taken by Mark A. Wilson (De ...nic-walled_microfossils)#Spores_and_pollen|pollen]] is no older than Early Cretaceous. Megafossils, large benthic foraminifers, and calcareous algae can be found
  17 KB (2,331 words) - 20:11, 10 August 2016
• Kingfisher field
  .... In this alternate scenario, some of the structures expressed at the Base Cretaceous unconformity (BCU) can be envisaged as being related to synrift [[fault]] g ...ssic]] [[prerift]] sequence of mudstones and evaporites overlain by a thin Lower [[Jurassic]] interval and a thicker interval of Middle Jurassic [[Pentland
  16 KB (2,358 words) - 16:28, 11 January 2024
• Silurian Qusaiba shales
  ...2000>Lüning, S., J. Craig, D. K. Loydell, P. Storch, and B. Fitches, 2000, Lower Silurian “hot shales” in North Africa and Arabia: Regional distribution ...tal2014 />). The reservoirs extend from the Middle [[Jurassic]] to Upper [[Cretaceous]] [[carbonate]]s (the major reservoir being the [[Arab Formation]]). Region
  18 KB (2,569 words) - 22:50, 8 January 2019
• Thelma field
  file:M115CH11FG02.jpg|{{figure number|2}}Thelma area: Base Cretaceous-depth structure map. ...resents final abandonment of the fan system and, in conjunction with Lower Cretaceous shales, provides the ultimate top seal and principal [[source rock]]. Middl
  17 KB (2,614 words) - 19:14, 17 January 2022
• Techniques for enhancing seismic facies analysis
  .... A 6.4-km, 32-m-deep valley network incised in the Muddy Formation (Lower Cretaceous) is difficult to see on the original data display. However, by compressing
  5 KB (720 words) - 18:51, 4 February 2022
• The Neuquén Basin: Sequence Stratigraphy of Vaca Muerta Formation
  ...9.</ref> and Weaver<ref>Weaver, C., 1931, Paleontology of the Jurassic and Cretaceous of West Central Argentina: Memoir University of Washington 1, 469 p.</ref> File:2.png|{{figure number|2}}Jurassic and Lower Cretaceous lithostratigraphy of the Neuquén Basin. Based on Spalletti & Veiga.<ref na
  16 KB (2,490 words) - 15:32, 8 January 2021
• Cuba: Geologic history
  ...s (including remarkable [[Paleogene]] [[orbitoids]]), the gigantic Upper [[Cretaceous]] [[rudistids]], the spectacular [[limestone]] Mogotes of Pinar del Rio, th ...Geomagnetic_reversals reversing polarity] to the southwest during the Late Cretaceous. Cuba's geology suggests that the subduction was continuously north dipping
  30 KB (4,263 words) - 22:00, 23 January 2019
• Jordan petroleum geology
  ...Ch07Fig1.jpg|Figure 1]], [[:file:M106Ch07Fig02.jpg|Figure 2]]) and the mid-Cretaceous sourced and reservoired Hamzeh oil field in central northern Jordan. ...north Oman: GeoArabia, v. 4, no. 2, p. 157–180.</ref> In Jordan, this mid-Cretaceous source rock level is thermally immature over large areas, except where deep
  16 KB (2,310 words) - 15:13, 19 January 2017
• Basin-centered gas systems: evaluation and exploration strategies
  ...lar manner, gas production from multiple sandstone reservoirs in the Upper Cretaceous Williams Fork Formation in the Piceance basin of western Colorado is commin ...ager log from a 1750 ft (533 m)-long horizontally drilled leg in the Upper Cretaceous Frontier Formation.<ref name=Krystinikandlorenz_2000>Krystinik, L. F., and
  34 KB (5,070 words) - 15:11, 23 August 2016
• Iran petroleum systems
  ...the Iranian waters, where oil, often heavy, and bitumen are found in Early Cretaceous and younger reservoirs. * The Early Cretaceous petroleum system: Source rocks deposited in the lower part of the Garau Formation during the Neocomian period extend in Lurestan
  27 KB (3,901 words) - 13:51, 26 January 2017
• Trap geometry: changes
  ...tural tilting. For example, [[Prudhoe Bay field]], charged during the Late Cretaceous and tilted during the late Eocene<ref name=ch11r1>Atkinson, C., McGowen, J. ...initial accumulation is fixed relative to the rock. The solid area on the lower figure marks the accumulation at the top of the structure after movement.
  6 KB (845 words) - 15:29, 1 February 2022
• Llanos basin
  ...u, J. C. Ramon, and J. Underschultz, 1994, Flow of formation waters in the Cretaceous-Miocene succession of the Llanos Basin, Colombia: [http://http://archives.d ...t–northwest dipping [[monocline]]. Southward, the Macarena Range exposes [[Cretaceous]] sequence and separates the LBC of the [[Putumayo basin]], which is the so
  23 KB (3,247 words) - 22:50, 8 January 2019
• Oil correlation case history: West Siberian basin
  ...s are reservoired throughout the section but are concentrated in the Lower Cretaceous and Upper Jurassic.
  6 KB (950 words) - 13:46, 16 February 2022
• Stable isotope stratigraphy
  ...er, A., Peltier, W. R., 1990, An alternate astronomical calibration of the lower Pleistocene time scale based on Ocean Drilling Program Site 677: Transactio ...r and steep with respect to time (e.g., during the Permian, Jurassic, Late Cretaceous, and several intervals within the Late Eocene to [[Holocene]]), the stronti
  9 KB (1,282 words) - 20:59, 31 January 2022
• Basin modeling: identifying and quantifying significant uncertainties
  ...al hydrocarbon source rocks, Upper [[Jurassic]], Lower [[Cretaceous]], and lower [[Miocene]]. The sources are modeled as uniformly distributed [[marine]] [[ | Lower [[Oligocene]] (m) || 10 || 100 || 1
  38 KB (5,890 words) - 15:16, 23 August 2016
• Top seal integrity: Central Graben example
  ...tral Graben, with Upper Jurassic reservoirs sealed by Upper Jurassic-Lower Cretaceous shales. A seismic line across both traps is shown in the following figure.
  6 KB (910 words) - 15:44, 30 March 2022
• Paraná Basin
  ...chemical and volcaniclastic sediments, between the Neo-Ordovician and Late Cretaceous. Part of the accumulation time a was interspersed with depositional gaps t ..., Sequences and stratigraphic hierarchy of the Paraná Basin (Ordovician to Cretaceous), Southern Brazil: Boletim IG-USP, São Paulo Série Científica, 29 p. 125
  22 KB (3,382 words) - 19:52, 4 January 2024
• Siliciclastic shorelines and barrier island reservoirs
  ...s are influenced by the degree of wave reworking up the shoreface profile. Lower figure from McCubbin.<ref name=McCubbin>McCubbin, D. G., 1992, [http://arch ...action and occasional storms act to deposit sand along the shoreface. The lower shoreface lies below fair-weather wave base but can be affected by storms;
  18 KB (2,607 words) - 15:33, 15 January 2024
• Barmer basin
  ...y a poorly known earlier [[rift]] of probable [[Jurassic]] and certainly [[Cretaceous]] age (Bladon et al., 2015<ref name=Bladonetal2015a />, 2015<ref name=Blado ...n et al., 2015b<ref name=Bladonetal2015b />). The [[Jurassic]] Lathi and [[Cretaceous]] Ghaggar-Hakra formations are sand-dominated, prerift reservoirs that are
  24 KB (3,528 words) - 22:50, 8 January 2019

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