... and extending 50 m deep below seafloor. The primary geotechnical data set covers 17 CPTs with cone tip trajectories tracked below seafloor, with additional synthetic CPT profiles along two survey track lines of 2D UHR seismic lines. Secondary geotechnical data includes (1) shear-wave velocities derived from...

... ABSTRACT: This paper presents the Free Fall Cone Penetration Test (FFCPT) as an accomplished, proven and efficient methodology developed for maritime defense and marine geotechnical surveys. The FFCPT can be used to investigate a wide variety of seafloor sediment types and was designed...

..., such as a rock dump or cement mattresses, on the seafloor above the cable. The other is to perform remedial trenching on the cable, which is where the cable undergoes another phase of trenching to try and excavate more sediment under the cable in an attempt to bury the cable further. The choice of the method...

... consideration foundation reservoir characterization soil profile assessment site investigation soil condition geologist mudmat scour mudmat foundation stability surficial soil seafloor subsea structure settlement configuration variability resistance Innovative Geotechnologies for Energy...

... ABSTRACT: Rippled Scour Depressions (RSD) are depressed bedforms containing characteristic ripples. They are a type of sorted bedform that mainly develop in areas with a shallow seafloor, strong waves/currents, and a thin mobile sand cover. This study focuses on RSD developed on Dogger Bank...

... is not penetrated dynamically into the seabed but starts a monotonic push at the seafloor (Figure 1). Because the CPT rod is entirely housed inside the barrel, the depth interval to which CPT data can be acquired cannot be greater than the length of the barrel. However, by carefully planning the dynamic penetration...

...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...

..., they are not suitable for a site where soil layers with high-penetration resistance are present near the seafloor. In relation with geological fea- tures, such as pockmarks, gas hydrates, carbonates or mass flow deposits, penetration of suction piles might prove impossible. In this case, driven anchor piles may become...

...1. Introduction Two deepwater soil investigations were performed in 2009 and in 2010 utilising a remotely operated seafloor based drilling system the Benthic Geotech Portable Remotely Operated Drill 1 (PROD 1) (Kelleher and Hull, 2008). The first campaign was at a Norwegian gas field (Site L...

... 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...

... site investigation seafloor shear strength geohazard soil boring soil bomg resistance piston core geophysical data geotechnical data information fiom foundation design gulf artificial intelligence caisson reservoir characterization pcpt upstream oil & gas rafted block...