In this month's AAPG BULLETIN...

June 2008

GEOLOGIC NOTE

Uranium depletion across the Permian/ Triassic boundary in Middle East carbonates: Signature of oceanic anoxia

Stephen N. Ehrenberg, Tore A. Svana, and Peter K. Swart

A decrease in uranium content across the Permian/Triassic boundary in a thick section of shallow-carbonates from offshore Iran suggests a global depletion of uranium in earliest-Triassic seawater due to deep-ocean anoxia and resulting uranium precipitation in oxygen-poor sediments.

Manuscript received September 4, 2007

GEOHORIZONS

Flow unit modeling and fine-scale predicted permeability validation in Atokan sandstones: Norcan East field, Kansas

Saibal Bhattacharya, Alan P. Byrnes, W. Lynn Watney and John H. Doveton

Characterizing the reservoir interval into flow units is an effective means for subdividing the net-pay zone into discreet layers for simulation but requires reliable estimates of permeability. A new method provides robust flow unit characterization for various types of reservoirs.

Manuscript received July 18, 2007

Chanel detection in 3-D seismic data using sweetness

Bruce S. Hart

Sweetness is a seismic attribute that, especially when used in conjunction with coherency, can be very useful for channel detection in deep-water clastic and coastal plain settings. Images of channels derived from sweetness are presented and potential applications discussed.

Manuscript received December 3, 2007

Fracture permeability created by perturbed stress fields around active faults in a fractured basement reservoir

Tetsuya Tamagawa and David D. Pollard

Flow properties in a fractured basement reservoir in the Yufutsu Field, Japan, indicate that wells penetrating areas near active faults have a high potential for hydrocarbon production due to a perturbed stress field in which horizontal stress is rotated ~90^o to the regional stress.

Manuscript received September 25, 2007

 

ARTICLES

Calcite cement in Permian deep-water sandstones, Delaware Basin, west Texas: Origin, distribution, and effect on reservoir properties

Shirley P. Dutton

Calcite cement is the dominant control on reservoir quality in turbidite sandstones of the Upper Permian Bell Canyon Formation, Delaware Basin, Texas. The origin and distribution of these cements are determined and the effects on reservoir properties discussed.

Manuscript received September 25, 2007

Stratigraphic well correlations for 3-D static modeling of carbonate reservoirs

Jean Borgomano, François Fournier, Sophie Viseur, and Lex Rijkels

The addition of a priori knowledge to stratigraphic well correlation in carbonate sedimentary systems aids the relation of core- and well-scale heterogeneities to those at reservoir and flow unit scales during static reservoir modeling, which is critical to establishing a coherent geological and petrophysical concept.

Manuscript received July 13, 2007

About the BULLETIN

First published in 1917 as the Bulletin of the Southwestern Association of Petroleum Geologists--AAPG’s predecessor organization--in order to disseminate scientific material from annual meetings of the S.A.P.G., the AAPG Bulletin changed its name one year later when S.A.P.G. became AAPG.

The AAPG Bulletin has been delivering quality research to the scientific world ever since. The first issue contained papers written by the best-known geologists of the day, and included papers on such topics as South America, Europe, and general geologic problems of structure and sedimentation.

While the 21st-century AAPG Bulletin has undergone some changes since 1917, enlarging to 8 ½ x 11” size to incorporate more material and being published digitally as well as in print, it continues to adhere to the primary purpose of the organization, which is to advance the science of geology especially as it relates to petroleum, natural gas, other subsurface fluids, and mineral resources.

Delivered digitally or in print monthly to each AAPG Member as a part of membership dues, the AAPG Bulletin is one of the most respected, peer-reviewed technical journals in existence, with recent issues containing papers focused on such topics as the Middle East, channel detection, China, permeability, subseismic fault prediction, the U.S., and Africa.