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Registros recuperados: 6
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Evidences of early to late fluid migration from an upper Miocene turbiditic channel revealed by 3D seismic coupled to geochemical sampling within seafloor pockmarks, Lower Congo Basin ArchiMer
Gay, A; Lopez, M; Cochonat, Pierre; Levache, D; Sermondadaz, G; Seranne, M.
Using high quality 3D seismic data within the Lower Congo Basin (LCB), we have identified pockmarks that are aligned above the sinuous belt of a buried turbiditic palaeo-channel, 1000 m beneath the seafloor. Geochemical analyses on cores (GC traces), taken in the centre of four of these pockmarks along this channel, show no clear evidence for migrated oil. But, some features of the GC traces, including elevated baselines (UCM > 34 mu g/g) and a broad molecular weight range of n-alkanes with little odd-even preference, may be interpreted as indicating the presence of thermogenic hydrocarbons in the cores. Seismic profiles show that these pockmarks developed above two-main features representative of pore fluid escape during early compaction: (1) closely...
Tipo: Text Palavras-chave: Pipes; Seismic chimneys; Polygonal faults; Fluid migration; Turbiditic channels; Pockmarks.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/publication-1673.pdf
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Fluid seepage in relation to seabed deformation on the central Nile Deep-Sea Fan, part 2: evidence from multibeam and sidescan imagery ArchiMer
Praeg, Daniel; Ketzer, Joao Marcelo; Augustin, Adolfo Herbert; Migeon, Sebastien; Ceramicola, Silvia; Dano, Alexandre; Ducassou, Emmanuelle; Dupre, Stephanie; Mascle, Jean; Rodrigues, Luiz Frederico.
On the central Nile deep-sea fan, stratified sediments overlying mass-transport deposits (MTDs) are deformed into slope-parallel seabed undulations associated with fluid seepage. The western part of this system, in water depths of 1,950–2,250 m, is examined using multi-frequency data from hull-mounted and deep-towed swath/profiling systems. Sub-bottom profiles show sub-vertical fluid pipes that terminate both at and below seabed, and gas signatures along fault planes bounding the undulations. Fluid seepage is recorded by high- to intermediate-backscatter patches (HBPs, IBPs) that differ in appearance on multibeam imagery (30 kHz, ≤3 m penetration) and sidescan swaths (170/190 kHz, <0.1 m penetration). Comparison of the two suggests a distinction of (a)...
Tipo: Text Palavras-chave: Slope undulations; Fluid seeps; Backscatter; Carbonates; Pipes; Faults.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00158/26956/25251.pdf
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Isolated seafloor pockmarks linked to BSRs, fluid chimneys, polygonal faults and stacked Oligocene-Miocene turbiditic palaeochannels in the Lower Congo Basin ArchiMer
Gay, Aurelien; Lopez, M; Cochonat, Pierre; Seranne, M; Levache, D; Sermondadaz, G.
Based on high-resolution 3D seismic data sets, we document the subsurface reservoir architecture and organization of a portion of the Oligocene-Miocene stratigraphy within the Congo Basin, offshore southwestern Africa. Within the 3D seismic volume, we have identified four levels of turbiditic palaeochannels, which are separated by low-amplitude continuous reflectors interpreted as hemipelagic sediments. Geochemical analyses on sediment samples taken within overlying seafloor pockmarks reveal the presence of thermogenic gases and oils, suggesting that deep-seated fluids have migrated through both the channel deposits and the impermeable layers between them, forming a conduit to the surface. Deep thermogenic fluids produced within Cretaceous source rocks are...
Tipo: Text Palavras-chave: Polygonal faults; BSR; Fluid chimneys; Pipes; Hydrates; Turbiditic palaeochannels; Pockmarks; Fluid migration.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/publication-1111.pdf
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Materiaux composites courants: Tenue au feu ArchiMer
Croquette, Jean; Baudin, M.
In the national naval composites project, several series of fire tests have been carried out on epoxy glass pipes and different structural materials commonly used in naval construction. This paper describes the materials tested and the procedures chosen to evaluate the fire reaction properties: flammability (M classification), smoke emission (F classification), and the fire resistance (IMO A 517(13)). The conclusions are given for both the testing procedures and the performance of the composite materials.
Tipo: Text Palavras-chave: Pipes; Fire; Tests; Materials testing; Ship technology; Composite materials; Tuyauteries; Sandwich; Tenue au feu; Matériau composite.
Ano: 1992 URL: http://archimer.ifremer.fr/doc/1992/acte-1047.pdf
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Possible impacts of the transformation of water infrastructure on productive water uses: The case of the Seokodibeng village in South Africa AgEcon
Ladki, Marvan; Seshoka, Jetrick; Faysse, Nicolas; Levite, Herve; van Koppen, Barbara.
Tipo: Working or Discussion Paper Palavras-chave: Water users’ associations; Water supply; Social participation; Land use; Water use; Villages; History; Domestic water; Irrigation water; Food security; Sanitation; Cost recovery; Project management; Pipes; Water balance; Livestock; Food Security and Poverty; Institutional and Behavioral Economics; Land Economics/Use; Livestock Production/Industries.
Ano: 2004 URL: http://purl.umn.edu/92656
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Tuyauteries composites: Installation prototype sur un bateau de peche ArchiMer
Croquette, Jean; Dufour, X; Forestier, J; Parquic, J.
A composite prototype engine cooling piping system was installed in 1990 by SBPI on a 50 meter fishing boat owned by Jego Quere. The installation on board was easy and no incident has happened since the beginning of this experiment, which is followed by a working group coordinated by Ifremer and checked by Bureau Veritas. Extended application of composite pipes may be contemplated.
Tipo: Text Palavras-chave: Corrosion; Fishing; Boats; Fishing vessels; Pipes; Ship technology; Composite materials; Corrosion; Pêche; Bateau; Tuyauterie composite.
Ano: 1992 URL: http://archimer.ifremer.fr/doc/1992/acte-1069.pdf
Registros recuperados: 6
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