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Hydroelectric power is, as of 2005, the second largest source of electricity in the world (18%) after coal, which supplies about 38%, but ahead of nuclear power, natural gas, and oil, which contribute 17, 16, and 10%, respectively, of the total generated electricity.

Added on 26 June, 2014

Energy Policy Blog By Edith Allison

Energy Week in Congress

This is Energy Week in the House, bringing a flurry of hearings and votes. But, topics in the news may not be on the agenda; for example, induced seismicity is an area of public concern, but Congress will not be considering the topic.

Added on 26 June, 2014

Wiki Article

Gas Hydrates

Gas hydrates (also called gas clathrates) are icelike, crystalline solids composed of natural-gas molecules, principally methane, trapped in rigid crystalline cages formed by frozen water molecules.

Added on 25 June, 2014

Explorer Division Column DEG By Doug Wyatt

One Last Look Back at A Very Good Year

I am reflecting on this past year of the DEG with my feet propped up, iPad in my lap, a cold libation in hand – and I am smiling.

Added on 01 June, 2014

Explorer Article

Technical Program Set, Registration Opens for ICE

The technical program has been finalized and registration is open for this year’s AAPG International Conference and Exhibition (ICE), set Sept. 14-17 in Istanbul, Turkey.

Added on 01 June, 2014

Explorer Emphasis Article By Louise Durham

Saline Water in Bakken: Where Did it Come From?

AAPG member Zell Peterman, U.S. Geological Survey scientist emeritus, is busy with colleagues examining Williston Basin Bakken formation water and the role of shale filtration.

Added on 01 June, 2014

Explorer Emphasis Article By Louise Durham

Cane Creek Shale Keeping Utah in Energy Mix

As the Bakken, Eagle Ford, Marcellus and other shale plays make national news, the Cane Creek reservoir might be the dark horse poised to emerge as another major shale play.

Added on 01 June, 2014

Explorer Emphasis Article By Heather Saucier

Bakken Boom Brings Big Changes to Dakota

With an economy in decline and a population exodus only a few short years ago, North Dakota has transformed into a boom state, thanks to the Bakken formation.

Added on 01 June, 2014

Explorer Emphasis Article By Heather Saucier

Colorado Crucial to Converging Dynamics

As Colorado goes, so goes the nation when it comes to energy and environmental policy and the court of public opinion.

Added on 01 June, 2014

Explorer Article By Ken Milam

Gas Leaks, Revisited

Some surprising findings bubbled up in a recent study of methane geochemistry in the Appalachian Basin. The findings could complicate the jobs of investigators trying to determine how stray methane gets into water wells.

Added on 01 June, 2014

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Explorer Article By J.K. Dietrich

Natural Increase of Oil Column Buoyancy and the Instability of Caprock Seals

A new type of buoyancy model can be used to understand the source of residual oil zones, both thick and thin, to help determine the likelihood that economically viable recoverable oil resides in transition zones of imbibition reservoirs. Application of a buoyancy and breech model will fill a void in reservoir characterization. It will help distinguish between TZs and ROZs, the first of which allows application of primary and secondary (waterflooding) oil recovery methods and the second of which requires more difficult CO2-enhanced oil recovery projects.

Added on 08 May, 2024

Explorer Geophysical Corner By Kenneth Bredesen,Kurt Marfurt,Ritesh Sharma,Satinder Chopra

Impact of Reprocessing Seismic Data

Advancements in processing and imaging techniques have continued over the last several decades, which have gradually improved the quality of the processed surface seismic data. When the quality of the existing seismic data is not adequate to perform an interpretation task reasonably, then the interpreter looks for other options. Is it feasible to acquire a new survey? In the absence of an improved survey, will reprocessing of seismic data be a good option?

Added on 01 December, 2023

Explorer Article By Barry Friedman

US Energy Forecast: Even Cloudier Than Usual

It isn’t news to anyone that prediction is difficult, especially when it’s the future (as a great man once said). Uncertainty and unpredictability are just a part of the job of tracking and predicting the future supply and demand of energy. That being the case, when energy analysts say that the current level of uncertainty is particularly high, it might be easy to dismiss it as a “dog bites man” story. It isn’t.

Added on 04 June, 2024

Explorer Historical Highlights By Jorge Navarro Comet

Casablanca: Spain's Biggest Oil Field

The Casablanca oil field, discovered in 1975 and located on the Mediterranean shelf edge, has been greatly significant in the world’s offshore oil industry activity, besides being by far the biggest oil field in Spain.

Added on 01 March, 2019

Explorer Director’s Corner By David Curtiss

Introducing the New EXPLORER, New Digital Newsletters

Perhaps you did a double take pulling the April issue of EXPLORER from the mailbox. What is this? If you joined AAPG in the last 40 years, you’ve only known EXPLORER in its long-standing tabloid format. It worked well for many years as our advertisers – particularly seismic companies – loved the large format and the ability to display their data on a sweeping canvas. For readers, it was a little more awkward.

Added on 01 April, 2024

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