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9525
 
Explorer Making a Difference

Committed to going the extra mile to improve lives and communicate to an often skeptical public, Houston-based Noble Energy has experienced an outpouring of gratitude from the communities in which they operate.

9500
 
Explorer Article

The human race currently finds itself rounding the corner of an unprecedented turning point in history, and it’s a direct consequence of what AAPG members do on a daily basis.  

8589
 
Explorer Policy Watch

Congressional Republicans want greater public access to scientific data used as a basis for determining the need for air pollution regulations.

8066
 
Explorer Policy Watch

The first seismic surveys of the Atlantic Outer Continental Shelf (OCS) since 1988 could happen in the next two years – if the Bureau of Ocean Energy Management (BOEM) finalizes the required environmental impact statement (EIS) in the next few months.

8079
 

A look at three main environmental issues that must be considered in the utilization of natural gas as a primary fuel source for the next several decades.

8052
 

Winning Hearts and Minds: Colombia and Latin American prospects offer high promise and difficult hurdles in the form of local political and public resistance.

5780
 
We use sediment ages and mercury (Hg) concentrations to estimate past and future concentrations in the South River, Virginia, where Hg was released between 1930 and 1950 from a manufacturing process related to nylon production. In a previous study, along a 40 km (25 mi) reach, samples were collected from 26 of 54 fine-grained deposits that formed in the lee of large wood obstructions in the channel and analyzed for grain size, Hg concentration, and organic content. We also obtained radiometric dates from six deposits. To create a history that reflects the full concentration distribution (which contains concentrations as high as 900 mg/kg [900 ppm]), here, we treat the deposits as a single reservoir exchanging contaminated sediments with the overlying water column, and assume that the total sediment mass in storage and the distribution of sediment ages are time invariant. We use reservoir theory to reconstruct the annual history of Hg concentration on suspended sediment using data from our previous study and new results presented here. Many different reconstructed histories fit our data. To constrain results, we use information from a well-preserved core (and our estimate of the total mass of Hg stored in 2007) to specify the years associated with the peak concentration of 900 mg/kg. Our results indicate that around 850 kg (1874 lb) of Hg was stored in the deposits between 1955 and 1961, compared to only 80 kg (176 lb) today. Simulations of future Hg remediation suggest that 100-yr timescales will be needed for the South River to remove Hg-contaminated sediments from the channel perimeter through natural processes.
5779
 

 SONAR, historical and aerial photographs, and vibracoring were used to assess the type and thickness distribution of sediments impounded by Gold Ray Dam on the Rogue River in southern Oregon. From these data, a volume of about 400,000 cubic yards (

Equation EG13006eq1

) of sediment was determined for the inundated area of the reservoir.

Overall, sediment volumes in the impounded part of the reservoir were less than expected. There are three possibilities that may explain the perceived absence of sediment: (1) the gradient of the Rogue River in this stretch is less, and therefore sediment yields are less; (2) the extraction of gravels and/or other impediments upstream decreased the availability of sediments delivered into the reservoir; and/or (3) sediment was deposited by a prograding delta that filled in the inundated area of the floodplain upstream from Gold Ray Dam. The amount of sediment deposited on this inundated floodplain may have been as much as 1,800,000 cubic yards (Equation EG13006eq2), bringing the total amount of sediment impounded by Gold Ray Dam to Equation EG13006eq3 yards (Equation EG13006eq4).

Applied sedimentology is not only vital to developing a depositional model for the filling of a reservoir, but also providing insights into depositional and erosional changes that will occur upon the removal of a dam. In particular, the processes of delta formation, reoccupation of abandoned channels, and avulsion are paramount in determining sediment accumulation and distribution in reservoirs.

3803
 
Explorer Policy Watch

Oil and natural gas production continued to grow in the United States in 2013 even as progress on new federal laws and regulations stalled – but local opposition to shale gas and oil development increased.

3792
 
Explorer Emphasis Article

Oil spills are a potential challenge in any corner of the world, but the Arctic brings its own set of challenges to oil production and transportation, and so it needs its own dedicated technologies for meeting them.

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In-Person Training
14 February, 3000 14 February, 3000 7815
 
14 February, 3000 14 February, 3000 7812
 
14 February, 3000 14 February, 3000 7816
 
14 February, 3000 14 February, 3000 7813
 
Online Training
01 January, 2014 01 January, 9999 3160
 
1 January 2014 - 1 January 9999

Learn to critically evaluate current issues that can impact growth and sustainability of oil and gas ventures.

16 April, 2013 16 April, 2013 1496
 
16 April 2013

The goal of this e-symposium is to provide an overview of the latest trends and technologies for water management for oil and gas drilling, completions, and production.

30 August, 2012 30 August, 2012 1489
 
30 August 2012

The entire Middle Pennsylvanian–to–top Precambrian basement (500 m) interval was cored in early 2011 in the BEREXCO Wellington KGS #1-32 well in Wellington Field, Sumner County, KS.

19 November, 2009 19 November, 2009 1453
 
19 November 2009

This presentation will review the results of ongoing carbon storage research in Kentucky by the Kentucky Geological Survey (KGS) and industry partners.

27 March, 2009 27 March, 2009 1435
 
27 March 2009

Join two GIS/geoscience experts Scott Sires and Gerry Bartz as they use information from the Teapot Dome Field in Wyoming (DOE/RMOTC program).

14 February, 3000 14 February, 3000 7817
 
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