HomeScience Discipline Sedimentology and Stratigraphy

Sedimentology and Stratigraphy

Explorer Geophysical Corner

As has been emphasized in the three preceding articles of this series, when a shear (S) wave propagates through a rock unit that has aligned vertical fractures, it splits into two S waves – a fast-S (S1) mode and a slow-S (S2) mode.

American Association of Petroleum Geologists (AAPG)
Explorer Article

A Fairway to paradise? Nova Scotia’s offshore energy industry is in the global spotlight after an enticing assessment of resources in the Scotian Basin.

American Association of Petroleum Geologists (AAPG)
Explorer Geophysical Corner

This month we continue our series on S waves and factures by taking a look at another laboratory measurement that illustrates an important behavior of S waves that propagate in fractured media.

American Association of Petroleum Geologists (AAPG)
Explorer Spotlight On…

The international competition, involving the world’s leading universities in petroleum geosciences, is hosted annually by AAPG and designed to give students an opportunity to use real technology on datasets, receive feedback from an industry panel, have the opportunity to impress potential employers in the audience and win cash awards for their schools.

American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

Oil and liquids-rich gas deposits are hot targets today among prospectors and operators – and the action in the self-sourced Niobrara shale play in the Rocky Mountain region is about as fired up as it can be.

American Association of Petroleum Geologists (AAPG)
Explorer Geophysical Corner

This month we expand our insights into the behavior of seismic S waves as they propagate through a fractured interval, with the emphasis placed on laboratory data of real S waves propagating through fractured real-Earth media.

American Association of Petroleum Geologists (AAPG)
Explorer Article

Just one year ago drilling in the off-limits eastern Gulf of Mexico appeared to be on the cusp of getting the green light from the U.S. government as calls for “drill, baby, drill” emanated from politicians as well as the ordinary Joe.

American Association of Petroleum Geologists (AAPG)
Explorer Spotlight On…

AAPG award-winning geologist Tony Doré once almost tossed a budding career in geology to hit the road with his guitar.

American Association of Petroleum Geologists (AAPG)
Explorer Geophysical Corner

When a shear (S) wave propagates through a rock unit that has vertical fractures oriented at a reasonably consistent azimuth, it splits into two S waves that propagate with distinct velocities.

American Association of Petroleum Geologists (AAPG)
Explorer Director’s Corner

Last year we conducted a few polls on AAPG programs and we realized that many members are not familiar with all of AAPG’s digital programs. For example, AAPG has three primary digital information programs with Datapages – the Archives, Search and Discovery and GIS-UDRIL.

American Association of Petroleum Geologists (AAPG)
DL Abstract

Around 170 million years ago, the Gulf of Mexico basin flooded catastrophically, and the pre-existing landscape, which had been a very rugged, arid, semi-desert world, was drowned beneath an inland sea of salt water. The drowned landscape was then buried under kilometers of salt, perfectly preserving the older topography. Now, with high-quality 3D seismic data, the salt appears as a transparent layer, and the details of the drowned world can be seen in exquisite detail, providing a unique snapshot of the world on the eve of the flooding event. We can map out hills and valleys, and a system of river gullies and a large, meandering river system. These rivers in turn fed into a deep central lake, whose surface was about 750m below global sea level. This new knowledge also reveals how the Louann Salt was deposited. In contrast to published models, the salt was deposited in a deep water, hypersaline sea. We can estimate the rate of deposition, and it was very fast; we believe that the entire thickness of several kilometers of salt was laid down in a few tens of thousands of years, making it possibly the fastest sustained deposition seen so far in the geological record.

Show more

Request a visit from Frank Peel!

American Association of Petroleum Geologists (AAPG)
DL Abstract

Three-dimensional (3D) seismic-reflection surveys provide one of the most important data types for understanding subsurface depositional systems. Quantitative analysis is commonly restricted to geophysical interpretation of elastic properties of rocks in the subsurface. Wide availability of 3D seismic-reflection data and integration provide opportunities for quantitative analysis of subsurface stratigraphic sequences. Here, we integrate traditional seismic-stratigraphic interpretation with quantitative geomorphologic analysis and numerical modeling to explore new insights into submarine-channel evolution.

Show more

Request a visit from Jacob Covault!

American Association of Petroleum Geologists (AAPG)
VG Abstract

In comparison with the known boundary conditions that promote salt deformation and flow in sedimentary basins, the processes involved with the mobilization of clay-rich detrital sediments are far less well established. This talk will use seismic examples in different tectonic settings to document the variety of shale geometries that can be formed under brittle and ductile deformations.

Request a visit from Juan I. Soto!

American Association of Petroleum Geologists (AAPG)

Related Interests

See Also ...