Petroleum Systems of Deepwater Settings

Weimer, Paul; Slatt, Roger M.

doi:10.1190/1.9781560801955

Cited by 43 publications

(44 citation statements)

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“…Turbidite channels are recognised as very important hydrocarbon reservoir types in almost all areas and settings where deep-water facies are being explored, appraised or produced (Beydoun et al, 2002;Brami et al, 2000;Broucke et al, 2004;Clemenceau et al, 2000;Deptuck et al, 2003;Fonnesu, 2003;Fugitt et al, 2000;Humphreys et al, 1999;Kendrick, 2000;Kolla et al, 2001;Mayall and O'Byrne, 2002;Mayall and Stewart, 2000;Navarre et al, 2002;Posamentier, 2003;Posamentier and Kolla, 2003;Posamentier et al, 2000;Prather, 2003;Prather et al, 1998;Sikkema and Wojcik, 2000;Wonham et al, 2000;Weimer and Slatt, 2004). Over the last 5-10 years, in particular, the significance of turbidite channel reservoirs to the hydrocarbon industry has substantially driven forward our understanding of these depositional systems.…”

Section: Introductionmentioning

confidence: 97%

Turbidite channel reservoirs—Key elements in facies prediction and effective development

Mayall¹,

Jones²,

Casey³

2006

Marine and Petroleum Geology

369

290

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Section: Introductionmentioning

confidence: 97%

Turbidite channel reservoirs—Key elements in facies prediction and effective development

Mayall¹,

Jones²,

Casey³

2006

Marine and Petroleum Geology

369

290

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“…Walker, 1978) but aroused particular interest from the hydrocarbon industry when large volumes of sand were encountered down-dip of muddy slopes, e.g. in Angola and the northern Gulf of Mexico (Mutti, 1977;Weimer & Slatt, 2004). The dominant mechanisms of downslope sediment transport through canyons and channels are sediment gravity flows, which are driven by the action of gravity on their excess density with respect to the ambient seawater (Middleton & Hampton, 1973).…”

Section: Introductionmentioning

confidence: 98%

Genesis and character of thin-bedded turbidites associated with submarine channels

Hansen

Callow

Kane

et al. 2015

Marine and Petroleum Geology

112

129

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Submarine channel related thin-bedded turbidites are deposited in environments such as external levees, internal levees, depositional terraces and at times of channel abandonment.Thin-bedded turbidites are defined as beds that are less than 10cm thick, but the described environments can at times contain beds up to 50cm thick which would be classified as medium or thick-bedded (Boggs, 2006). This paper addresses many examples of these environments from the modern seafloor, outcrop and the subsurface to suggest criteria that assist in the differentiation of levees and terraces from an architectural, sedimentological, M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT 2 ichnological and hydrocarbon reservoir perspective. External levees confine channel belts and are elongate sedimentary deposits that are a product of over-spill of turbidity currents from the channel belt they confine. External levees often have predictable vertical, lateral and downstream changes but can commonly be modified by collapse of the inner external levee into the channel, collapse on the outer external levee, sediment waves, and interaction of external levees with topographic features such as other channels, other external levees, basin margins or previous slump/slide blocks, which can greatly modify the sand distribution within them.A combination of internal levees, depositional terraces and slide blocks of external levee sediment make up thin-bedded turbidites within channel belts. We differentiate between wedge shaped internal levees and topographically flat or subdued depositional terraces whose differing geometries and sand distribution reflect the fact that the flow processes involved in the formation of these deposits are different. The characteristic wedge shape of an internal levee requires sufficient space within the channel belt for the over-spilling current to decelerate and deposit the majority of its suspended sediment before reaching the bounding topography of the channel belt. In the case of depositional terraces the space available in the channel belt is insufficient for the current to deposit the majority of its sediment before reaching the bounding topography of the channel belt, creating confined sheet-like deposits.External levees, internal levees and depositional terraces have distinct sedimentological characteristics such as sand bed thickness trends and sedimentary structures that can be used to distinguish them. Together with sedimentological characteristics, in some systems these thin-bedded turbidite deposits contain distinctive trace fossil assemblages, where channel proximal deposits such as proximal external levees, internal levees and depositional terraces M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT 3 can have much higher biodiversity than sand-rich channel axes and more mud-dominated outer external levees.The depositional sites for internal levees and depositional terraces within channel belts can be formed by various processes such as entrenchment, point bar accretion, meander bend cutoff, ...

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“…Acquisition of 3D volumes of seismic data compensates for the difficulty of observing deep-water processes and products in modern environments (e. g., Posamentier and Walker 2006;Weimer and Slatt 2007). Most depositional elements that form in the deep-water setting develop over km-size scales in plan view, which is why few outcrop-based studies can replace or rival the imaging generated by the high-resolution 3D seismic data.…”

Section: Introductionmentioning

confidence: 99%

Sequence Stratigraphy: Methodology and Nomenclature

Catuneanu

Galloway

Kendall

et al. 2011

nos

744

460

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Abstract. The recurrence of the same types of sequence stratigraphic surface through geologic time defines cycles of change in accommodation or sediment supply, which correspond to sequences in the rock record. These cycles may be symmetrical or asymmetrical, and may or may not include all types of systems tracts that may be expected within a fully developed sequence. Depending on the scale of observation, sequences and their bounding surfaces may be ascribed to different hierarchical orders. Stratal stacking patterns combine to define trends in geometric character that include upstepping, forestepping, backstepping and downstepping, expressing three types of shoreline shift: forced regression (forestepping and downstepping at the shoreline), normal regression (forestepping and upstepping at the shoreline) and transgression (backstepping at the shoreline). Stacking patterns that are independent of shoreline trajectories may also be defined on the basis of changes in depositional style that can be correlated regionally. All stratal stacking patterns reflect the interplay of the same two fundamental variables, namely accommodation (the space available for potential sediment accumulation) and sediment supply. Deposits defined by specific stratal stacking patterns form the basic constituents of any sequence stratigraphic unit, from sequence to systems tract and parasequence. Changes in stratal stacking patterns define the position and timing of key sequence stratigraphic surfaces. Precisely which surfaces are selected as sequence boundaries varies as a function of which surfaces are best expressed within the context of the depositional setting and the preservation of facies relationships and stratal stacking patterns in that succession. The high degree of variability in the expression of sequence stratigraphic units and bounding surfaces in the rock record means ideally that the methodology used to analyze their depositional setting should be flexible from one sequence stratigraphic approach to another. Construction of this framework ensures the success of the method in terms of its objectives to provide a process-based understanding of the stratigraphic architecture. The purpose of this paper is to emphasize a standard but flexible methodology that remains objective.

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Petroleum Systems of Deepwater Settings

Cited by 43 publications

References 0 publications

Turbidite channel reservoirs—Key elements in facies prediction and effective development

Turbidite channel reservoirs—Key elements in facies prediction and effective development

Genesis and character of thin-bedded turbidites associated with submarine channels

Sequence Stratigraphy: Methodology and Nomenclature

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