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Line 112: − + − − '''Regime:''' Depositional reservoirs − :'''Class:''' Isolated depositional reservoirs − ::'''Subclass:''' Isolated carbonate reservoirs − :::'''Superfamily:''' Marine carbonate reservoirs − ::::'''Family:''' Open-shelf (high-energy) carbonates − :::::'''Subfamily:''' Shoal − ::::::'''Variety:''' Oolite − ::::::'''Variety:''' Skeletal − ::::'''Family:''' Tidal-zone carbonates − :::::'''Subfamily:''' Tidal channel − ::'''Subclass:''' Isolated sandstone reservoirs − :::'''Superfamily:''' Marine sandstone traps − ::::'''Family:''' Shallow-water sandstone reservoirs − :::::'''Subfamily:''' Beach − :::::'''Subfamily:''' Barrier island − :::::'''Subfamily:''' Offshore bar − ::::'''Family:''' Deepwater sandstone reservoirs − :::::'''Subfamily:''' Turbidites − :::::'''Subfamily:''' Turbidite channel − :::::'''Subfamily:''' Submarine fans − :::'''Superfamily:''' Alluvial sandstone reservoirs − ::::'''Family:''' Fluvial − :::::'''Subfamily:''' Channel − ::::::'''Variety:''' Deltaic − ::::'''Family:''' Deltaic − :::::'''Subfamily:''' Distributary channel − ::'''Subclass:''' Isolated igneous reservoirs − :::'''Superfamily:''' Intrusive igneous bodies − ::::'''Family:''' Intrusive sills − :'''Class:''' Depositional pinch-outs − ::'''Subclass:''' Sandstone pinch-outs − :::'''Superfamily:''' Marine sandstone pinch-outs − ::::'''Family:''' Shallow marine − ::::Updip pinch-out of shallow marine sands into lagoonal or basinal shales and silts. − :::::'''Subfamily:''' Barrier bar − ::::::'''Variety:''' Pinch-out into lagoonal shale − ::::::'''Variety:''' Pinch-out into marine shale − ::::'''Family:''' Deep marine − :::::'''Subfamily:''' Turbidite − :::::Updip pinch-out of marine turbidite sandstone into marine shale. − :::'''Superfamily:''' Lacustrine sandstone pinch-outs − ::::'''Family:''' Lacustrine delta pinch-out − ::'''Subclass:''' Carbonate pinch-outs − :::'''Superfamily:''' Marine carbonate pinch-outs − ::::'''Family:''' Tidal zone − :::::'''Subfamily:''' Tidal-flat carbonate pinch-out − ::::::'''Variety:''' Pinch-out into silts and shales − ::::::'''Variety:''' Pinch-out into tight dolomites and anhydrite − ::::'''Family:''' Open shelf (high energy) − :::::'''Subfamily:''' Carbonate bank pinch-out − ::::::'''Reservoir variety:''' Rudistid limestone bank − ::::::'''Seal variety:''' − :::::::'''Top:''' Marine shale − :::::::'''Side:''' Tight shelf limestone − :'''Class:''' Depositional relief − ::'''Subclass:''' Sandstone − :::'''Superfamily:''' Eolian sandstone reservoirs − ::::'''Family:''' Dune − :::'''Superfamily:''' Marine sandstone reservoirs − ::::'''Family:''' Deep water − :::::'''Subfamily:''' Turbidite fan − ::'''Subclass:''' Carbonate − :::'''Superfamily:''' Marine carbonate reservoirs − ::::'''Family:''' Bioherms − ::::Trap results from depositional relief created by porous organic carbonate buildup sealed by overlying and adjacent tight lithologies. These buildups are commonly referred to as reefs. A wide variety of reef traps have been described and classified based upon both the environment of deposition and geometry of the carbonate reservoir. Oil and gas have been trapped in barrier reefs, fringing reefs, platform reefs, atoll reefs, patch reefs, pinnacle reefs, reef mounds (or mud mounts), and carbonate banks (James and Gelsetzer, 1989). These terms can be used as subfamilies, as noted below. If a more detailed classification is needed, varieties can be established based upon the facies and genesis of the sealing units surrounding the buildups. − :::::'''Subfamily:''' Pinnacle reefs − :::::High-relief, circular or ovoid mounds created by upward grown of carbonate frame-building organisms in basinal setting. Reef typically contains a significant amount of high-energy carbonate detritus (grain-stones, wackestones) as well as boundstones and framestones. Reef width is less than 10% of height (James and Geldsetzer, 1989). − :::::'''Subfamily:''' Platform reefs − :::::Larger reefal carbonate buildup in which lateral dimensions are measured in kilometers and in which reef width is more than 10 times reef height (James and Geldsetzer, 1989). − :::::'''Subfamily:''' Patch reefs − :::::Small, low-relief carbonate mounds developed by frame-building organisms on top of a shelf. − :::::'''Subfamily:''' Mud mounds − :::::Depositional carbonate mounds consisting largely of clean lime mudstone with relatively little macro-fossil debris. − :'''Class:''' Supraunconformity traps − ::'''Subclass:''' Onlap pinch-out − :::'''Superfamily:''' Nonmarine erosion surface − ::::'''Family:''' Sequence-boundary unconformity onlap − :::::'''Subfamily:''' Depositional re-entrant − ::::::'''Reservoir variety:''' Deltaic sandstone pinch-out − ::::::'''Seal variety:''' − :::::::'''Top:''' Deltaic shale − :::::::'''Bottom:''' Subunconformity units − ::'''Subclass:''' Buttress pinch-outs − :::'''Superfamily:''' Nonmarine erosional surface − ::::'''Family:''' Sequence-boundary unconformity buttress − :::::'''Subfamily:''' Pinch-out against erosional ridge − ::::::'''Reservoir variety:''' Alluvial sandstone − ::::::'''Seal variety:''' − :::::::'''Top:''' Nonmarine shale − :::::::'''Side:''' Marine shale of subcrop ridge − :::::::'''Bottom:''' Marine shale beneath unconformity
→Families
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| ''Subclass: Buttress pinch-outs'' || ''Nonmarine erosional surface'' || ''Sequence-boundary unconformity buttress'' || ''Pinch-out against erosional ridge'' || ''Alluvial sandstone'' || ''Nonmarine shale'' || ''Marine shale of sub crop ridge'' || ''Marine shale beneath unconformity''
| ''Subclass: Buttress pinch-outs'' || ''Nonmarine erosional surface'' || ''Sequence-boundary unconformity buttress'' || ''Pinch-out against erosional ridge'' || ''Alluvial sandstone'' || ''Nonmarine shale'' || ''Marine shale of sub crop ridge'' || ''Marine shale beneath unconformity''
|}
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==See also==
==See also==