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)
Explorer Article

The Rovuma Basin off the coast of Mozambique is not on the radar screen of a whole lot of folks.

American Association of Petroleum Geologists (AAPG)
Explorer Geophysical Corner

Seismic attributes are particularly effective for extracting subtle geologic features from relatively noise-free seismic data. However, seismic data are usually contaminated by both random and coherent noise, even when the data have been migrated reasonably well and are multiple-free.

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

Science is the heartbeat of AAPG. It is the key for innovation in our industry, and AAPG is dedicated to finding new scientific developments and related new technologies.

American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

Once it became clear that natural gas prices likely will remain dismal for some time, many companies working the shale gas plays recognized they had best punch up their production by adding some respectably-priced oil and liquids-rich gas.

American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

The Arkoma Basin has long been a popular drilling focus for the industry. As the saying goes, everything “old” is new again – and the Arkoma is no exception.

American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

Conduct a poll among E&P folks regarding seismic, and it’s likely the consensus would be that advanced seismic technology – especially 3-D and 4-D – is the greatest thing to happen since sliced bread and cold beer debuted.

American Association of Petroleum Geologists (AAPG)
Explorer Historical Highlights

The Nelson Field in the North Sea is the British Gas discovery featured in a new series of articles focusing on the history of petroleum geology.

American Association of Petroleum Geologists (AAPG)
Explorer Geophysical Corner

For decades, seismic analysis of subsurface geology has been limited to information that can be extracted from compressional-wave (P-wave) seismic data – but numerous geophysicists are now becoming aware of the advantages of combining shear-wave (S-wave) data with P-wave data.

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.

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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)
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.

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Request a visit from Frank Peel!

American Association of Petroleum Geologists (AAPG)

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