Bulletin Article

5777
 

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.

Explorer Article

10763
 
ICE 2014 marks the first time an AAPG international conference will be held in Istanbul – but that’s not the only new dynamic being offered. This meeting also marks the first time the APPEX Regional meeting will be held in conjunction with an ICE.
9502
 
Explorer Article

Mystery of the deep: No one knows for sure what quantity of gas hydrates awaits discovery deep in the earth, but projections are auspicious.

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.

3786
 
Explorer Article

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.

Explorer Division Column EMD

3800
 

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.

Explorer Emphasis

10742
 
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.
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.

Explorer Geophysical Corner

10214
 
Explorer Geophysical Corner

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.

Explorer Making a Difference

10768
 
Explorer Making a Difference
AAPG’s Publication Pipeline Committee recently had a small celebration to mark a very big accomplishment: Just a few weeks ago, the group officially topped the 100-ton mark of books, periodicals and other information that have been shipped around the world.

Field Seminar

Salt Lake City Utah United States 14 September, 2014 21 September, 2014 151
 
Salt Lake City, Utah, United States
14-21 September 2014

Participants will learn a specific and comprehensive methodology for finding and developing conventional and unconventional oil and gas resources associated with lake deposits. The seminar will start with the Quaternary Bonneville basin in Utah, to build familiarity with lacustrine depositional processes. Participants then examine world-famous exposures of organic-rich mudstone, fluvial sandstone, and carbonate microbialite facies in Wyoming.

Workshop

Wellington New Zealand 21 April, 2015 23 April, 2015 10641
 
Wellington, New Zealand
21-23 April 2015

Make plans to attend an AAPG Geosciences Technology Workshop (GTW) to be held in Wellington between April 21-23, 2015. The workshop will comprise four half-day sessions focused on broad depositional environment settings. The aim is to better understand modern depositional systems, and how they can help us to better interpret ancient petroleum reservoirs.

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Peter William Baillie Peter William Baillie Advisory Counselor (2011-2017) CGG +65 8127 8225
Peter William Baillie Peter William Baillie Past President (2014-2017) CGG +65 8127 8225

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