Labourdette et al., 2006

(1) Sand-Rich Sediment

High-Concentration Turbidites

Low-Concentration Turbidites (1) Sand-Rich Systems

High-concentration turbidites Dominated by low sinuosity, sand-rich channels and distributary lobes

(2) Mud-Rich Systems Low-concentration turbidites Dominated by high sinuosity, mud-rich channel-levee complexes with small terminal lobes

Sediment Supply Control on Deepwater Reservoir Styles

Channel-dominated transitioning to lobe/sheet dominated

Beaubouef et al (2000)

Brushy Canyon

Slope to Basin Floor Profiles

Distributary Lobe System

Canyon/Bypass

Weakly Confined System Slope Valley

System High Gradient

Moderate Gradient

High Gradient (due to active structure)

Low Gradient

Slope Valley System

Gradient Control on Deepwater Reservoir Styles

Topographic controls

1500 ft 30 ft

Schematic GR Log

Channel base

Channel Element

Characteristics of Elements Erosionally confined Low aspect ratio channels (10:1 to 50:1) High net:gross No lateral facies variations Dominated by amalgamated massive sandstones, which become thinner bedded toward margins Sharp-based, blocky gamma ray response Vertical and lateral continuity is typically excellent due to high degree of channel amalgamation

Channel Elements: Amalgamated Channel-Fills

1500 ft 30 ft

Schematic GR Log

Channel Margin

Channel Axis

Channel Element

Channel Complex

Axis Margin

Characteristics of Elements Erosionally confined Low aspect ratio channels (10:1 to 80:1) Moderate to high net:gross Lateral variations in facies Dominated by amalgamated, massive sandstones in an axial position, but become distinctly thinner bedded and less

amalgamated toward margins Sharp-based, blocky gamma ray response in axial position, but gradationally based and commonly thickening-upward

character in marginal position Vertical & lateral continuity is typically excellent due to channel amalgamation

Channel Elements : Semi-Amalgamated Channel-Fills

1500 ft 30 ft

Schematic GR Log

Channel Element

Channel Complex

Characteristics of Elements Erosionally confined Low aspect ratio channels (10:1 to 50:1) Low net:gross Channel-fill dominated by bypass or abandonment facies comprised of mudstones, low-concentration turbidites

and muddy debrites Serrated, generally high gamma ray response

Channel Elements: Non-Amalgamated Channel-Fills

1500 ft 30 ft

Schematic GR Log

Channel Base

Channel Element

Channel Complex

Channel Elements: Mud-Lined Channel-Fills

Channel Elements : Lateral Accretion Packages (LAPS)

1000 ft 30 ft

Schematic GR Log

Characteristics of Elements Erosionally confined, High sinuosity w/ distinctive map pattern Low aspect ratio channels (10:1 to 30:1) Channels filled with inclined sand bodies (LAPs) which dip toward the channel axis Lithologic composition of the (LAPs) is variable, although they tend to be dominated by sandstones at the base and finer grained,

less amalgamated beds towards the top LAPs best developed on inside bend of sinuous channels and tend to be isolated Vertical & lateral continuity is low due to isolated nature of sandstone-prone facies

Channel Element

Channel Complex

Channel base

Sullivan et al., 2006 2/6/2014

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