Explorer Emphasis Article
By David Brown
This year, URTeC has added an enhanced preview of “Coming Attractions.” In addition to looking at established plays, URTeC will provide significant information about emerging unconventional resource possibilities in North America and around the world.
American Association of Petroleum Geologists (AAPG)
Added on 01 July, 2014
Explorer Geophysical Corner
By Bill Keach,Clayton Chandler,Colby Hazard,David Tingey,Gene Wolfe,Jani Radebaugh,John McBride,Kari Arnold,Scott Ritter,Thomas Morris
Steeply dipping bedforms and bed sets often develop where sediment accumulates and migrates, and are expressed as clinoform patterns on seismic data. Ground-penetrating radar (GPR) provides ultra-high-resolution images of the internal structure of these sediment accumulations.
American Association of Petroleum Geologists (AAPG)
Added on 01 June, 2014
Explorer Article
By David Brown
Mystery of the deep: No one knows for sure what quantity of gas hydrates awaits discovery deep in the earth, but projections are auspicious.
American Association of Petroleum Geologists (AAPG)
Added on 01 May, 2014
Explorer Emphasis Article
By Brian Ervin
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.
American Association of Petroleum Geologists (AAPG)
Added on 01 March, 2014
Explorer Division Column EMD
By Jeremy Boak
Every six months, chairs of the Energy Minerals Division committees convene and report on developments in the areas they cover. In this column, we highlight important observations from these recent reports.
American Association of Petroleum Geologists (AAPG)
Added on 01 February, 2014
Explorer Article
By Sophia Ford
The Indian state of West Bengal, located in eastern India and stretching from the Himalayas to the Bay of Bengal, is a cultural hub where art and literacy flourished. This landscape is dominated by winding rivers and luscious fields of spices, rice and other crops. The Bengal Basin region, however, is confronted with some of the highest levels of naturally occurring arsenic (As) in drinking water, which poses a major health-related environmental threat to the 70-100 million people living in the area.
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American Association of Petroleum Geologists (AAPG)
Added on 01 February, 2014
Bulletin Article
The influence of moisture, temperature, coal rank, and differential enthalpy on the methane (CH4) and carbon dioxide (CO2) sorption capacity of coals of different rank has been investigated by using high-pressure sorption isotherms at 303, 318, and 333 K (CH4) and 318, 333, and 348 K (CO2), respectively. The variation of sorption capacity was studied as a function of burial depth of coal seams using the corresponding Langmuir parameters in combination with a geothermal gradient of 0.03 K/m and a normal hydrostatic pressure gradient. Taking the gas content corresponding to 100% gas saturation at maximum burial depth as a reference value, the theoretical CH4 saturation after the uplift of the coal seam was computed as a function of depth. According to these calculations, the change in sorption capacity caused by changing pressure, temperature conditions during uplift will lead consistently to high saturation values. Therefore, the commonly observed undersaturation of coal seams is most likely related to dismigration (losses into adjacent formations and atmosphere). Finally, we attempt to identify sweet spots for CO2-enhanced coalbed methane (CO2-ECBM) production. The CO2-ECBM is expected to become less effective with increasing depth because the CO2-to-CH4 sorption capacity ratio decreases with increasing temperature and pressure. Furthermore, CO2-ECBM efficiency will decrease with increasing maturity because of the highest sorption capacity ratio and affinity difference between CO2 and CH4 for low mature coals.
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American Association of Petroleum Geologists (AAPG)
Added on 31 January, 2014