Changes

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.<ref>Kneller, B., M. Dykstra, and P. Thompson, 2007, Collapse of submarine channel levees, examples from outcrop and subsurface, and reservoir implications: Abstracts of the 2007 AAPG Annual Convention and Exhibition, p. 77.</ref> 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.<ref>Kneller, B., M. Dykstra, and P. Thompson, 2007, Collapse of submarine channel levees, examples from outcrop and subsurface, and reservoir implications: Abstracts of the 2007 AAPG Annual Convention and Exhibition, p. 77.</ref> 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.

Injection wells located in overbank splays have poor communication with wells in the channel fill of the East Ford field in Texas (Dutton et al., 2003). The levee deposits can be a production target in their own right. In the Ram-Powell field in the Gulf of Mexico, production data indicate that levee deposits, although thin bedded, can show reservoir connectivity over a large area and give impressive production rates (Shew et al., 1995; <ref name=WeimerandSlatt />).

Injection wells located in overbank splays have poor communication with wells in the channel fill of the East Ford field in Texas.<ref>Dutton, S. P., W. A. Flanders, and M. D. Barton, 2003, [http://archives.datapages.com/data/bulletns/2003/04apr/0609/0609.HTM Reservoir characterization of a Permian deep-water sandstone, East Ford field, Delaware basin, Texas]: AAPG Bulletin, v. 87, no. 4, p. 609–627.</ref> The levee deposits can be a production target in their own right. In the Ram-Powell field in the Gulf of Mexico, production data indicate that levee deposits, although thin bedded, can show reservoir connectivity over a large area and give impressive production rates (Shew et al., 1995; <ref name=WeimerandSlatt />).

==Production from sheet complexes==

==Production from sheet complexes==