Bulletin Article

3250
 

Criteria for recognizing stratigraphic sequences are well established on continental margins but more challenging to apply in basinal settings. We report an investigation of the Upper Devonian Woodford Shale, Permian Basin, west Texas based on a set of four long cores, identifying sea level cycles and stratigraphic sequences in an organic-rich shale.

The Woodford Shale is dominated by organic-rich mudstone, sharply overlain by a bioturbated organic-poor mudstone that is consistent with a second-order eustatic sea level fall. Interbedded with the organic-rich mudstone are carbonate beds, chert beds, and radiolarian laminae, all interpreted as sediment gravity-flow deposits. Bundles of interbedded mudstone and carbonate beds alternate with intervals of organic-rich mudstone and thin radiolaria-rich laminae, defining a 5–10 m (16–33 ft)-thick third-order cyclicity. The former are interpreted to represent highstand systems tracts, whereas the latter are interpreted as representing falling stage, lowstand, and transgressive systems tracts. Carbonate beds predominate in the lower Woodford section, associated with highstand shedding at a second-order scale; chert beds predominate in the upper Woodford section, responding to the second-order lowstand.

Additional variability is introduced by geographic position. Wells nearest the western margin of the basin have the greatest concentration of carbonate beds caused by proximity to a carbonate platform. A well near the southern margin has the greatest concentration of chert beds, resulting from shedding of biogenic silica from a southern source. A well in the basin center has little chert and carbonate; here, third-order sea level cycles were primarily reflected in the stratigraphic distribution of radiolarian-rich laminae.

Explorer Article

8049
 

Online registration is open for this year’s AAPG Annual Convention and Exhibition, which will be held April 6-9 at the George R. Brown Convention Center in Houston – and reduced registration fees are still available for those who act fast.

Explorer Division Column DPA

10745
 
During my term as DPA president this year our theme will be “Culture of Greatness.” This may sound arrogant, but I think it is important to recognize and promote the culture of professionalism and discovery that has provided cheap energy for mankind for more than 100 years.

Explorer Emphasis

9507
 
Explorer Emphasis Article

America’s recent ascent to the high-level status of a hydrocarbon producer worthy of a significant presence on the world stage of leading producers stems from something new and a rebirth of something old.

8050
 

Seismic Outlook: After several years of plenty, 2014 is expected to be a comparatively lean year for the seismic industry, a few localized hot-spots around the world notwithstanding.

127
 
Explorer Emphasis Article

Is that a UFO? Actually it is a UAV (unmanned aerial vehicle), which is an airborne drone that is proving to be useful both onshore and offshore.

2653
 
Explorer Emphasis Article

A valuable study funded by the Texas Water Development Board sets aside the controversy and takes a closer look at hydraulic fracturing and water resources and consumption.

2628
 
Explorer Emphasis Article

Wireless 'push-pull' shooting method reduces acquisition costs relative to traces per bin in recent Permian Basin survey.

2525
 
Explorer Emphasis Article

New dimensions: Geoscientists study how 3-D views of Eagle Ford outcrops are a great tool.

Explorer ProTracks

10770
 
Explorer ProTracks
The Southwest Section (SWS) Young Professionals (YPs) have had a great start to 2014.

Education Conference Course

Houston Texas United States 10 November, 2014 11 November, 2014 10569
 
Houston, Texas, United States
10-11 November 2014

This course is oriented towards the recognition and characterization of uncertainty in unconventional reservoirs.

Houston Texas United States 10 November, 2014 11 November, 2014 10487
 
Houston, Texas, United States
10-11 November 2014

This course summarizes the major advances and current controversies in dolomite research.

Short Course

Fort Worth Texas United States 06 January, 2015 06 January, 2015 10658
 
Fort Worth, Texas, United States
6 January 2015
The AAPG Southwest Section presents the 2015 Bill Hailey Memorial Short Course in Fort Worth, Texas. Art Saller will be speaking on Paleozoic carbonates. 
Abilene Texas United States 05 January, 2015 05 January, 2015 10649
 
Abilene, Texas, United States
5 January 2015
The AAPG Southwest Section presents the 2015 Bill Hailey Memorial Short Course in Abilene, Texas. Art Saller will be speaking on Paleozoic carbonates. 
Houston Texas United States 08 December, 2014 11 December, 2014 1517
 
Houston, Texas, United States
8-11 December 2014

This course is designed to give participants the basic working tools to explore and develop hydrocarbons in salt basins. Because no two basins are alike, the focus is on understanding the processes and styles of salt-related deformation. At course completion participants should be able to under the depositional setting of layered evaporites, describe the mechanics of salt flow, interpret salt and stratal geometries associated with diapirs, salt welds, and minibasins, and assess more accurately the risks in the exploration of salt basins.

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