Deep-water channels in the lower Congo basin: Evolution of the geomorphology and depositional environment during the Miocene

Massive exploration effort in the study area was conducted in 1996-2014 when deep-water drilling campaign found significant oil and gas discoveries but yet to optimally reach the middle Miocene deep-water sandstone reservoirs. Outcrops, well bores and 2D-seismic data had been incorporated in this study. Datum age from several taxon indicators have been utilized to correlate and unify various markers across the study area into four key biostratigraphy markers: M40, M45, M50, and M65. These four markers are at that point tied to the 2D seismic data in the act of the main horizons in conducting the seismic stratigraphy analysis over the study area not reached by wells. Identifying candidate of sub-regional sequence boundaries onshore and offshore that correspond with relative sea-level drops are the main result of this study. These results were integrated to generate the deep-water fan facies of the middle Miocene's gross depositional environment (GDE) maps, which generally show prograding succession easterly in the various shelf-breaks shifting laterally. The angle of slope and the horizontal length of the shelf-to-slope breaks significantly change from the Middle to Late Miocene until Recent time.Keywords: GDE, deep-water fan, Middle Miocene, Kutei, North Makassar.

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THE IMPACT OF BED- TO GEOBODY-ARCHITECTURE ON RESERVOIR PREDICTION: HYPOTHESIS-BASED MODELING IN A DEEP-WATER DEPOSITIONAL ENVIRONMENT

10.1130/abs/2019am-330982 ◽

2019 ◽

Author(s):

Lisa Stright ◽

Keyword(s):

Deep Water ◽

Depositional Environment ◽

Reservoir Prediction ◽

The Impact

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Pre-basaltic sediments (Aptian–Paleocene) of the Kangerlussuaq Basin, southern East Greenland

Geological Survey of Denmark and Greenland Bulletin ◽

10.34194/ggub.v189.5163 ◽

2001 ◽

pp. 99-106 ◽

Cited By ~ 4

Author(s):

Michael Larsen ◽

Morten Bjerager ◽

Tor Nedkvitne ◽

Snorre Olaussen ◽

Thomas Preuss

Keyword(s):

North Atlantic ◽

Deep Water ◽

Sediment Supply ◽

Basin Evolution ◽

East Greenland ◽

Sea Floor ◽

North West ◽

The North ◽

The North Atlantic ◽

Sea Floor Spreading

NOTE: This article was published in a former series of GEUS Bulletin. Please use the original series name when citing this article, for example: Larsen, M., Bjerager, M., Nedkvitne, T., Olaussen, S., & Preuss, T. (2001). Pre-basaltic sediments (Aptian–Paleocene) of the Kangerlussuaq Basin, southern East Greenland. Geology of Greenland Survey Bulletin, 189, 99-106. https://doi.org/10.34194/ggub.v189.5163 _______________ The recent licensing round in the deep-water areas south-east of the Faeroe Islands has emphasised the continued interest of the oil industry in the frontier areas of the North Atlantic volcanic margins. The search for hydrocarbons is at present focused on the Cretaceous– Paleocene succession with the Paleocene deepwater play as the most promising (Lamers & Carmichael 1999). The exploration and evaluation of possible plays are almost solely based on seismic interpretation and limited log and core data from wells in the area west of the Shetlands. The Kangerlussuaq Basin in southern East Greenland (Fig. 1) provides, however, important information on basin evolution prior to and during continental break-up that finally led to active sea-floor spreading in the northern North Atlantic. In addition, palaeogeographic reconstructions locate the southern East Greenland margin only 50–100 km north-west of the present-day Faeroe Islands (Skogseid et al. 2000), suggesting the possibility of sediment supply to the offshore basins before the onset of rifting and sea-floor spreading. In this region the Lower Cretaceous – Palaeogene sedimentary succession reaches almost 1 km in thickness and comprises sediments of the Kangerdlugssuaq Group and the siliciclastic lower part of the otherwise basaltic Blosseville Group (Fig. 2). Note that the Kangerdlugssuaq Group was defined when the fjord Kangerlussuaq was known as ‘Kangerdlugssuaq’. Based on field work by the Geological Survey of Denmark and Greenland (GEUS) during summer 1995 (Larsen et al. 1996), the sedimentology, sequence stratigraphy and basin evolution of the Kangerlussuaq Basin were interpreted and compared with the deep-water offshore areas of the North Atlantic (Larsen et al. 1999a, b).

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ABSTRACT: Sandstone sheets associated with deep-water channels: three analogue candidates for HARPS in Turkish Eocene exposures with different origin, external geometry and connectivity

AAPG Bulletin ◽

10.1306/a96743c8-1738-11d7-8645000102c1865d ◽

2000 ◽

Vol 84 ◽

Author(s):

Cronin, Bryan T1, Andrew Hurst1 (1)

Keyword(s):

Deep Water ◽

Water Channels ◽

Different Origin

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Evolution of the passive margin of the peripheral foreland basin: an example from the Lower Miocene Carpathian Foredeep (Czech Republic)

Geologica Carpathica ◽

10.1515/geoca-2016-0003 ◽

2016 ◽

Vol 67 (1) ◽

pp. 41-68 ◽

Cited By ~ 3

Author(s):

Michal Francírek ◽

Slavomír Nehyba

Keyword(s):

Depositional Environment ◽

Foreland Basin ◽

Passive Margin ◽

Basin Evolution ◽

Marine Deposits ◽

Thrust Front ◽

Outer Western Carpathians ◽

Carpathian Foredeep ◽

Depositional Units ◽

Flysch Rocks

Abstract The Karpatian deposits of the central part of the Carpathian Foredeep in Moravia, which are deeply buried under the Outer Western Carpathians, provide a unique opportunity to reconstruct the former evolutionary stages of this peripheral foreland basin and its paleogeography. A succession of three depositional units characterized by a distinct depositional environment, provenance, and partly also foreland basin depozone, have been identified. The first depositional unit represents a proximal forebulge depozone and consists of lagoon-estuary and barred coastline deposits. The source from the “local” crystalline basement played here an important role. The second depositional unit consists of coastline to shallow marine deposits and is interpreted as a forebulge depozone. Tidalites recognized within this unit represent the only described tide-generated deposits of the Neogene infill of the Carpathian Foredeep basin in Moravia. The source from the basin passive margin (the Bohemian Massif) has been proved. The third depositional unit is formed by offshore deposits and represents a foredeep depozone. The provenance from both passive and active basin margin (Silesian Unit of the Western Carpathian Flysch Zone) has been proved. Thus, both a stepwise migration of the foredeep basin axis and shift of basin depozones outwards/cratonwards were documented, together with forebulge retreat. The shift of the foreland basin depozones more than 50 km cratonward can be assumed. The renewed thrusting along the basin’s active margin finally completely changed the basin shape and paleogeography. The upper part of the infill was deformed outside the prograding thrust front of flysch nappes and the flysch rocks together with a strip of Miocene sediments were superposed onto the inner part of the basin. The width and bathymetric gradient of the entire basin was changed/reduced and the deposition continued toward the platform. The basin evolution and changes in its geometry are interpreted as a consequence of the phases of the thrust-sheet stacking and sediment loading in combination with sea-level change.

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The Shipping of Fremantle

10.5949/liverpool/9780968128824.003.0005 ◽

2018 ◽

Author(s):

Malcolm Tull

Keyword(s):

Twentieth Century ◽

Deep Water ◽

Water Channels ◽

Vessel Size ◽

Passenger Ships

This chapter discusses the development of port activity to suit the movement of ships. Over the course of the twentieth century the average vessel size grew from 5200 to 19,000 gross registered tons. The development in ship technology changed the nature, shape and weight of cargo and passenger ships significantly enough to require a vast restructuring of the port to include deep-water channels and berths - a costly endeavour.

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