Deepwater Reservoir Characterization And Implications For Hydrocarbon Production - An Example From The Zafiro Field, Equatorial Guinea

Ardill, J.; Jensen, Richard P.; Evans, Sheila V.; Garfield, Timothy R.; Beaubouef, R. T.

doi:10.4043/17686-ms

Cited by 4 publications

(12 citation statements)

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“…Sinuous channels, with or without their associated overbanks, within larger channels/valleys/canyons, have also been found to be common in many other deep-water depositional systems in subsurface and in outcrop (e.g. Sikkima and Wojcik, 2000;Wonham et al, 2000;Kolla et al, 2001;Deptuck et al, 2003;Ardill et al, 2005;Cronin et al, 2005).…”

Section: Morphologic and Internal Characteristics From Seismicmentioning

confidence: 95%

“…The fill facies may have off-lapping, on-lapping or even converging strata within the cuts. Ardill et al (2005) reported laterally migrating, amalgamated, and low to moderately sinuous channels in the lower part, and more vertically aggrading, highly sinuous channels in the upper part of Pliocene slope channel complexes of the Zafiro Field, deep-water off Equatorial Guinea. These styles of sinuous channel stacking in the Zafiro Field channel complex are broadly similar to many examples discussed here.…”

Section: Article In Pressmentioning

confidence: 96%

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Deep-water and fluvial sinuous channels—Characteristics, similarities and dissimilarities, and modes of formation

Kolla

Posamentier

Wood

2007

Marine and Petroleum Geology

159

108

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Section: Morphologic and Internal Characteristics From Seismicmentioning

confidence: 95%

Section: Article In Pressmentioning

confidence: 96%

Deep-water and fluvial sinuous channels—Characteristics, similarities and dissimilarities, and modes of formation

Kolla

Posamentier

Wood

2007

Marine and Petroleum Geology

159

108

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“…This deduced sand content change during channel evolution is also showed in Figure 6 illustrated by the change from hot color to cold color fill of the channel. This upward fining profile is even similar to many other deepwater sinuous channel and channel complex reservoirs, e.g., DSDP drilling (DSDP Leg 96 Scientific Party) of sinuous Mississippi channel (Stelting et al, 1985), Sequoia deepwater channel complex reservoir in Egypt (Cross et al, 2009), deepwater channel complex in West Africa (Navarre et al, 2002;Ardill et al, 2005) and channel complex reservoir in Australia Molasse basin (Hubbard et al, 2009). These channel, channel complexes and sub-successions in channel complex show fining upward of sedimentary facies with a corresponding decrease in bed amalgamation.…”

Section: Channel Fill Patternmentioning

confidence: 82%

“…The seismic geomorphology has been used as a powerful and efficient tool to characterize the deepwater depositional system and quantitatively measure the dimensions of depositional elements (Posamentier and Kolla, 2003;Wood and Mize-Spansky, 2009). So far, the seismic geomorphologic studies in deepwater setting mostly focused on the geometry of channel complex or submarine fan complex (Navarre et al, 2002;Posamentier and Kolla, 2003;Beaubouef, 2004;Ardill et al, 2005;Cross et al, 2009;Dykstra and Kneller, 2009;Hubbard et al, 2009). For single channel, several researches were done either on single channel's geometric feature or basic quantitative morphology in slope setting (Kolla et al, 2001;Wood and Mize-Spansky, 2009).…”

Section: Introductionmentioning

confidence: 99%

“…2D seismic characterization of geometry (Morton and Weimer, 2000) or outcrop investigation of lithology evolution (Hall and Stanley et al, 1973;Arnott, 2007). Since many deepwater fans or channel complexes develop at the base-of-slope setting, they are combination of discrete single channel and amalgamated channel (Ardill et al, 2005) and only one channel in channel complex is active at any one time (Wynn et al, 2007). Under these circumstances, we think it is important to characterize the qualitative and quantitative feature of the seismic geomorphology and geometric evolution for single channel in base-of-slope setting.…”

Section: Introductionmentioning

confidence: 99%

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Seismic Geomorphology and Geometric Evolution of a Single Base-of-Slope Deepwater Channel in the near Seafloor of Alaminos Canyon, Northwestern Deep Gulf of Mexico

Jiang

Henriksen

Weimer

2011

Energy Exploration & Exploitation

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The main goal of this article is to investigate the seismic geomorphology and geometric evolution of the single base-of-slope deepwater channel within a depositional sequence in Alaminos Canyon area of northwestern deep Gulf of Mexico. High resolution 3D seismic data was used to characterize the stratigraphic architecture evolution of deepwater deposits within 300 milliseconds interval below the sea floor. The seismic geomorphologic feature of deepwater channel was fast interpreted by combining seismic cross sections and stratal slices rendered by domain transformation. The surface wrapping interpretation results of the deepwater channel indicate that the near seafloor channel evolved from earlier wider and straight channel to later relatively narrow and sinuous channel within a depositional sequence. The channel exhibits vertical aggrading pattern in updip confined setting and changes to appear lateral migrating pattern in downdip unconfined setting through time. The spatial and temporal evolution of this deepwater channel in this study represents the typical evolution of the channel in base-of-slope deepwater setting and can be used as analog to predict and characterize the deepwater hydrocarbon reservoir at exploration depth in this area or other similar settings around the world.

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Morphology and Internal Structure of a Recent Upper Bengal Fan-Valley Complex

Kolla¹,

Bandyopadhyay²,

Gupta³

et al. 2012

Application of the Principles of Seismic Geomorphology to Continental-Slope and Base-of-Slope Systems: Case Studies From Seaflo

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3D seismic and multibeam data show that the present seafloor morphology of the entire upper Bengal Fan-valley complex is broadly sinuous and is more than 20 km wide in places, and consists of a highly sinuous channel flanked by a series of several terraces or overbanks on either side all along its length. This morphology is but a surface expression of the underlying internal structure and evolution of several, vertically and laterally stacked valley fills and their flanking overbanks. Each of these valleys consists of underfit sinuous channel fills with development of scrolling, indicative of much lateral channel migration with downstream shifts in their courses in the initial stages of their evolution. The scrolls may be of high seismic amplitudes, sand-prone, or of low seismic amplitudes, mud-prone. In their later stages of evolution, the channels exhibit more aggradation. Cutoffs are more common in the initial stages of sinuous-channel evolution and less common in the latter stages. The highly sinuous channel on the present sea floor is also an underfit feature and represents the latest phase of the uppermost valley fill. The various stages of channel evolution are a function of the hydrodynamics of the flows in the channels and sediment grain size supplied. At the very base of the above mentioned main valley-fill complex, but frequently amalgamated to it, a fan-shaped network of straight to slightly sinuous channels with thin fills, fed by the same canyon as for the overlying valley complex, is present. This basal channel network reflects smaller flows in the very initial stages of avulsion from an older upper fan-valley complex to the east. However, the overlying main valley complex reflects large-volume flows when the avulsion became fully established later and the canyon was entirely feeding it. The innermost terraces on either side of the present sinuous channel on the seafloor resulted from its flanking overbanks over the abandoned channel fills within the uppermost valley of the complex. The more outer terraces formed from the overbanks of successively younger valleys when they abutted against the higher banks of the preceding older and larger valleys. The recent upper fan-valley complex may have originated during the last glacial stage and continued to evolve mainly until about 6000 years B.P. (Weber et al., 1997; Hübscher et al., 1997). Smaller turbidity flows that could not have generated overbanks may have continued subsequently. However, our cores from the latest upper-fan sinuous channel with brown oxidized muds at the tops show that there is little or no turbidity-current activity in it at present.

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Deepwater Reservoir Characterization And Implications For Hydrocarbon Production - An Example From The Zafiro Field, Equatorial Guinea

Cited by 4 publications

References 0 publications

Deep-water and fluvial sinuous channels—Characteristics, similarities and dissimilarities, and modes of formation

Deep-water and fluvial sinuous channels—Characteristics, similarities and dissimilarities, and modes of formation

Seismic Geomorphology and Geometric Evolution of a Single Base-of-Slope Deepwater Channel in the near Seafloor of Alaminos Canyon, Northwestern Deep Gulf of Mexico

Morphology and Internal Structure of a Recent Upper Bengal Fan-Valley Complex

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