...-oriented adaptive finite element-modeling algorithm for efficient 2.5D imaging of the CSEM data. 2D inversions from MC118 are consistent with 1D apparent resistivity pseudosections and reveal resistive areas associated with the carbonate/hydrate mound. An extensive conductive region exists below...

... Abstract Multiscale seabed seepage manifestations are identified on high-resolution geophysical datasets in an area of the South Caspian Basin and compared with seepage features at the Dashgil mud volcano, onshore Azerbaijan. Features identified range from small-scale gas seepage mounds...

... to discriminate the backscatter response of four seafloor features: a carbonate mound, a hydrate mound, a small mud volcano, and pockmarks in the vicinity of the well- documented Bush Hill seep site. Each of these features are associated with fluid migration though both the geologic structures...

... Abstract High temperature hydrothermal activity was first observed 30 years ago in the modern oceans where hot springs are precipitating sulfide-sulfate-silica mounds and columnar edifices (" chimneys??) of calcium, barium, iron, copper, zinc, lead, silver and gold with other minor elements...

... (several 10 s of cm or larger) carbonate outcrops; (2) there is a strong correlation between this carbonate substrate and high- intensity backscatter in AUV multibeam sonar data; and (3), carbonate outcrops are distinctly visible in the AUV sidescan sonar data as anomalous seafloor mounds...

... of asphalt at the seabed in the Puma area was a key finding of the 2007 ROV survey. The asphalt generally occurs on a muddy substrate, as mounds from five to 20 ft in diameter and up to about four ft high, with no appreciable mud cover suggesting they were very recently deposited (Figure 4). The external...

.... Tubeworm and mussel beds were generally small, scattered patches, associated with small mounds and pockmarks. Chemosynthetic communities occurred only in areas underlain by acoustically amorphous sediments. However, a large portion of the seafloor above the acoustically amorphous sediments showed...

..., these communities were found to occur in conjunction with carbonate hardgrounds and mounds, mudflows, mud volcanoes, gas hydrates, and a variety of brine seep features (Roberts and Aharon, 1994; Sassen et al., 1994; McDonald et al., 19904; and others). As the exploration for oil and gas expands throughout the deep...

... mound otc 19356 fault scarp shenzi field rov survey field layout flowline reservoir characterization subsea system chemosynthetic organism sea fan upstream oil & gas seafloor offshore technology conference chemosynthetic community shenzi project mexico tar mound gulf...

... bathymetry data escarpment base headwall scarp resolution backscatter offshore technology conference canyon sediment reservoir characterization seafloor backscatter image mound geology upstream oil & gas florida escarpment auv artificial intelligence platform sonar...

...., fax 01-972-952-9435. Abstract The first AUV survey across five fields of deep-water coral mounds in the Straits of Florida reveals an unexpected high abundance and variability of mounds in water depths of 590 875 m. A drop camera and a series of dives with the Johnson- Sea-Link submersible confirmed...

... depths greater than 450m and often outcrop in mounds along faults that intersect the sea floor. Hydrates outcropping at the sea floor are in direct contact with a relatively large volume of sea water. They are stable only marginally because salt in sufficient concentration impedes hydrate formation...

... and the geology and history of MC118 are beginning to unfold. Preliminary conclusions are that occurrences of hydrate as well as gas venting are localized, concentrated in the vicinity of a large mound in the south-central portion of the block, that venting is likely related to fracturing in the vicinity...

... hydrate mound high backscatter mound upstream oil & gas canyon federal lease block 118 offshore technology conference reservoir characterization bathymetric mapping gulf depression submarine canyon high resolution seismic reflector syncline vertical seismic profile artificial...

..., to the right is a topographic render of the Mohican Channel BSR draped with reflector amplitude. Strong negative amplitudes are in orange. Plan view of the fault pattern is clearly visible as a polygonal pattern. Uplifted reflectors around some of the high angle faults appear as circular mounds or holes...

.... This area is on the margin of an uplifted and compressed mini-basin and in the vicinity of numerous giant gas mounds at the seafloor. Interpreted tophole stratigraphy includes laterally extensive, steeply dipping basin floor silts and sands. This paper shows images of hydrate-trapped gas at multiple...

... Abstract Mud mounds are common features at hydrocarbon seeps in the northern Gulf of Mexico and are thought to result primarily from the expulsion of formation fluids along deep-seated faults. Although such mounds are commonly observed in industry geophysical data, few studies have attempted...

... caisson gravel bedding layer mound condensate blanket gas new development mound height seismic design placement op den velde otc 14189 connection joint reservoir characterization Copyright 2002, Offshore Technology Conference This paper was prepared for presentation at the 2002 Offshore...

... sediment reservoir characterization geohazard otc 12957 rockall trough sidescan sonar image seafloor northern rockall trough faeroe-shetland channel mound masson otc 12957 operator vehicle offshore technology conference upstream oil & gas southampton oceanography centre...

... Abstract Mounds of various sizes occur as part of the surface geology of the northern Gulf of Mexico continental slope. The origins of these mounds vary from buildups created by sediment extrusion, to shale and salt diapirs forced by sediment/salt deformation associated with gas hydrate...