Lower Cretaceous Avile Sandstone, Neuquen basin, Argentina - Exploration model for a lowstand clastic wedge in a back-arc basin

Ryer, T A

Title: Lower Cretaceous Avile Sandstone, Neuquen basin, Argentina - Exploration model for a lowstand clastic wedge in a back-arc basin

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Abstract

The Neuquen basin of western Argentina is a back-arc basin that was occupied by epeiric seas during much of Jurassic and Cretaceous time. The Avile Sandstone Member of the Agrio Formation records a pronounced but short-lived regression of the Agrio sea during middle Hauterivian (Early Cretaceous) time. Abrupt lowering of relative sea level resulted in emergence and erosion of the Agrio sea floor; shoreline and fluvial facies characteristic of the Centenario Formation shifted basinward. The Avile rests erosionally upon lower Agrio shale over a large area; well-sorted, porous sandstones within the member pinch out laterally against the base-Avile erosional surface. Avile deposition closed with an abrupt transgression of the shoreline to the approximate position it had occupied prior to the Avile regression. The transgressive deposits are carbonate rich, reflecting starvation of the basin as a consequence of sea-level rise. The Avile lowstand clastic wedge consists predominantly of sandstones deposited in fluvial to shallow-marine paleoenvironments; eolian sandstones probably constitute an important component in the eastern part of the area. The sandstones locally have excellent reservoir characteristics; they constitute the reservoirs in the Puesto Hernandez, Chihuido de la Sierra Negra, and Filo Morado fields. The pinch-out of the Avile lowstand clastic wedgemore »« less

Authors:

Ryer, T A ^[1]

Apache International, Denver, CO (United States)

Publication Date:: Fri Mar 01 00:00:00 EST 1991

OSTI Identifier:: 7272068

Report Number(s):: CONF-910403-
Journal ID: ISSN 0149-1423; CODEN: AABUD

Resource Type:: Conference

Journal Name:: AAPG Bulletin (American Association of Petroleum Geologists); (United States)

Additional Journal Information:: Journal Volume: 75:3; Conference: Annual meeting of the American Association of Petroleum Geologists (AAPG), Dallas, TX (United States), 7-10 Apr 1991; Journal ID: ISSN 0149-1423

Country of Publication:: United States

Language:: English

Subject:: 02 PETROLEUM; ARGENTINA; PETROLEUM DEPOSITS; EXPLORATION; RESERVOIR ROCK; DEPOSITION; GEOLOGIC MODELS; CRETACEOUS PERIOD; GEOLOGIC FORMATIONS; GEOLOGIC HISTORY; SANDSTONES; SEDIMENTARY BASINS; DEVELOPING COUNTRIES; GEOLOGIC AGES; GEOLOGIC DEPOSITS; GEOLOGIC STRUCTURES; LATIN AMERICA; MESOZOIC ERA; MINERAL RESOURCES; RESOURCES; ROCKS; SEDIMENTARY ROCKS; SOUTH AMERICA; 020200* - Petroleum- Reserves, Geology, & Exploration

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                    Ryer, T A. Lower Cretaceous Avile Sandstone, Neuquen basin, Argentina - Exploration model for a lowstand clastic wedge in a back-arc basin.  United States: N. p., 1991. 
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                    Ryer, T A. Lower Cretaceous Avile Sandstone, Neuquen basin, Argentina - Exploration model for a lowstand clastic wedge in a back-arc basin.  United States.

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                    Ryer, T A. 1991.  
        "Lower Cretaceous Avile Sandstone, Neuquen basin, Argentina - Exploration model for a lowstand clastic wedge in a back-arc basin".  United States.

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@article{osti_7272068,

  title        = {Lower Cretaceous Avile Sandstone, Neuquen basin, Argentina - Exploration model for a lowstand clastic wedge in a back-arc basin},

  author       = {Ryer, T A},

  abstractNote = {The Neuquen basin of western Argentina is a back-arc basin that was occupied by epeiric seas during much of Jurassic and Cretaceous time. The Avile Sandstone Member of the Agrio Formation records a pronounced but short-lived regression of the Agrio sea during middle Hauterivian (Early Cretaceous) time. Abrupt lowering of relative sea level resulted in emergence and erosion of the Agrio sea floor; shoreline and fluvial facies characteristic of the Centenario Formation shifted basinward. The Avile rests erosionally upon lower Agrio shale over a large area; well-sorted, porous sandstones within the member pinch out laterally against the base-Avile erosional surface. Avile deposition closed with an abrupt transgression of the shoreline to the approximate position it had occupied prior to the Avile regression. The transgressive deposits are carbonate rich, reflecting starvation of the basin as a consequence of sea-level rise. The Avile lowstand clastic wedge consists predominantly of sandstones deposited in fluvial to shallow-marine paleoenvironments; eolian sandstones probably constitute an important component in the eastern part of the area. The sandstones locally have excellent reservoir characteristics; they constitute the reservoirs in the Puesto Hernandez, Chihuido de la Sierra Negra, and Filo Morado fields. The pinch-out of the Avile lowstand clastic wedge has the potential to form stratigraphic traps in favorable structural positions. The depositional model indicates that there may be a viable stratigraphic play to be made along the Avile pinch-out in the deep, relatively undrilled, northwestern part of the Neuquen basin.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/7272068},
  journal      = {AAPG Bulletin (American Association of Petroleum Geologists); (United States)},

  issn         = {0149-1423},

  number       = ,

  volume       = 75:3,

  place        = {United States},

  year         = {Fri Mar 01 00:00:00 EST 1991},

  month        = {Fri Mar 01 00:00:00 EST 1991}

}

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