...1. Introduction In soil mechanics, it is customary to consider that marine soils are completely saturated. However, several studies have identified that numerous types of gas exist in marine sediments, with methane gas being the most common (Claypool and Kaplan, 1974; Schubel, 1974; Christian...

... – the most common reef-building coral - forms colonies up to several metres wide and is capable of forming extensive reefs composed of live and dead coral skeleton. mapping sediment iceberg plough mark cold-water coral reef coral lophelia rubble substrate mixed sediment freiwald sonar data...

... reservoir characterization dataset north sea tranche sediment quaternary geology 1 geo challenge upstream oil & gas seismic anomaly dogger bank multibeam bathymetry investigation forewind 1. Introduction In June 2008, the Crown Estate announced the opening of nine development zones within...

.... Introduction There is frequently a requirement to bury pipelines and cables into seabed sediments to protect them from external threats. A variety of trenching techniques are used that are dependent on the seabed sediments present and the nature of the product being trenched. The trenching operations can have...

... a simple approach based on strain rate dependent shearing resistance and fluid mechanics drag resistance. 223 The lower lake, which is situated in County Ferman- agh, is located in a deep glacial trough. The lakebed is largely composed of fine-grained sediments and limestone debris of boulder clay...

...1. Introduction As energy and mineral exploration move into deeper water, there is a growing need for high- quality drilling, sampling and in situ testing of near-surface seafloor sediments. Projects in deep water often require a variety of structures to be placed on and in the seafloor. Hence...

...1. Introduction 1.1 Background Very soft offshore sediments within the Gulf of Guinea present sizeable challenges for the design of pipelines and suction caissons that are to be installed into these sediments. Undrained shear strength pro- files of these sediments typically exhibit high values...

... currents in terms of risk due to erosion and redeposition of seabed sediments. 1. Introduction The exploration of deepwater canyon systems for hydrocarbons presents short- and long-term concern for drilling and stability of seabed infrastructure. There is a general perception that canyons...

... in the Arctic Ocean, relict permafrost can be possible. investigation hydrate sediment freezing point arctic offshore reservoir characterization permafrost thickness upstream oil & gas soil temperature russian arctic offshore permafrost soil section stratum reflector pingo pechora...

... of the precise geometry and loading conditions of common jack-up rigs used in the GoS. The highest probability for punch-through conditions is in deeper water environments (>50m water depth) and in areas where large wadis bring abundant sediment into the GoS. 1. Introduction The Gulf of Suez (GoS...

... accurate geological information needed to ensure that foundation design is adequate for the purpose intended (Moorlock et al., 2002). It is important to integrate the seismic model with the borehole data to identify the top of the chalk ef- fectively and provide information on the Quaternary sediments...

... by sci- entific community. The trial of a new aramid cable onboard the R/V Le Suroît was an opportunity to examine the effect of the elastic recoil of such a cable on the recovered sediment. The use of accelerom- eters allowed for the recording the behaviour of a corer and un- derstanding the effect...

... ABSTRACT The mechanical properties of hydrate bearing sediments may deteriorate as a result of hydrate dissociation due to heating of the wellbore casing, with possible adverse effects on the stability of the casing. The authors have created a numerical model in plane strain in order...

... harpoon free fall cone penetrometer osig final penetration resistance undrained shear strength drilling operation reservoir characterization free fall cone penetrometer assessment sensor deployment harpoon ffcpt sediment strength harpoon ffcpt deployment upstream oil & gas...

... in the pockmarks, and carbonate boulders are present in the centre of some pockmarks. The surface sediments inside the pockmarks are coarser (sandy/grave- ly) compared to the sediments outside of the pockmarks, which consist of fine clay and silt fractions. The geotechnical test results, in situ monitoring...

... foram reservoir characterization structural geology pockmark hydrate upstream oil & gas sea level offshore site investigation characteristic sediment investigation artificial intelligence international offshore site investigation troll area carbonate seafloor concentration...

... this observation, the Troll Shallow Gas Project was initiated by Statoil. One of the purposes of this project was to gain a better understanding of the migration of free gas through soft seabed sediments, as well as the many pockmarks found at the seabed around the Troll platform2. Therefore small scale model...

... matter content diffraction sediment gulf quantification laser diffraction sedimentation determination suspension procedure mineral reservoir characterization drilling fluid management & disposal particle size distribution drilling fluids and materials upstream oil & gas...

... are typically currents along and downslope, which may cause erosion and sediment input or deposition. Triggering mechanisms include, for example, seismicity, soils strength variations due to pore pressure changes, disturbance due to halokinesis, shallow gas and hydrate sublimation and cyclical loading...

... present a theoretical study of the thermodynamic chemical equilibrium of gas hydrate in sediment, which is based on models previously reported by Handa (1989), Sloan (1998) and Henry (1999). This model fulIy accounts for the latent heat effects. It uses a new formulation based on the enthalpy form...