Changes

==Production from channel-levee complexes==

==Production from channel-levee complexes==

[[File:M91FG195.JPG|thumb|300px|{{figure number|3}}Schematic section across a deep-water channel-levee complex based on outcrops from the Cerro Toro Formation, Upper Cretaceous, southern Chile (from Beaubouef, 2004). The lower section shows a series of idealized gamma ray logs. Reprinted with permission from the AAPG.]]

[[File:M91FG195.JPG|thumb|300px|{{figure number|3}}Schematic section across a deep-water channel-levee complex based on outcrops from the Cerro Toro Formation, Upper Cretaceous, southern Chile (from Beaubouef<ref name=BB2004 />). The lower section shows a series of idealized gamma ray logs. Reprinted with permission from the AAPG.]]

Channel-levee complexes can show highly variable continuity between the channels and levees ([[:File:M91FG195.JPG|Figure 3]]). It is common for hydrocarbons in the channel-fill sandstones to be poorly connected with the levee sediments. The channel fills may be younger than the levees themselves, and the beds in the proximal levee deposits may be discontinuous.<ref>Cronin, B. T., A. Hurst, H. Celik, and I. Turkmen, 2000, Superb exposures of a channel, levee and overbank complex in an ancient, deep-water slope environment: Sedimentary Geology, v. 132, p. 205–216.</ref><ref name=BB2004>Beaubouef, R. T., 2004, [http://archives.datapages.com/data/bulletns/2004/11nov/1471/1471.HTM Deep-water leveed channel complexes of the Cerro Toro formation, Upper Cretaceous, southern Chile]: AAPG Bulletin, v. 11, p. 1471–1500.</ref> Kneller et al. (2007) noted that collapse structures, including rotated blocks, slide sheets, slump folds, and thick debris flows, are common on levee margins and may contribute to poor reservoir continuity.

Channel-levee complexes can show highly variable continuity between the channels and levees ([[:File:M91FG195.JPG|Figure 3]]). It is common for hydrocarbons in the channel-fill sandstones to be poorly connected with the levee sediments. The channel fills may be younger than the levees themselves, and the beds in the proximal levee deposits may be discontinuous.<ref>Cronin, B. T., A. Hurst, H. Celik, and I. Turkmen, 2000, Superb exposures of a channel, levee and overbank complex in an ancient, deep-water slope environment: Sedimentary Geology, v. 132, p. 205–216.</ref><ref name=BB2004>Beaubouef, R. T., 2004, [http://archives.datapages.com/data/bulletns/2004/11nov/1471/1471.HTM Deep-water leveed channel complexes of the Cerro Toro formation, Upper Cretaceous, southern Chile]: AAPG Bulletin, v. 11, p. 1471–1500.</ref> Kneller et al. (2007) noted that collapse structures, including rotated blocks, slide sheets, slump folds, and thick debris flows, are common on levee margins and may contribute to poor reservoir continuity.