Bulletin Article

 
Understanding the distribution and geometry of reservoir geobodies is crucial for net-to-gross estimates and to model subsurface flow. This article focuses on the process of dolomitization and resulting geometry of diagenetic geobodies in an outcrop of Jurassic host rocks from northern Oman. Field and petrographic data show that a first phase of stratabound dolomite is crosscut by a second phase of fault-related dolomite. The stratabound dolomite geobodies are laterally continuous for at least several hundreds of meters (sim1000 ft) and probably regionally and are one-half meter (1.6 ft) thick. Based on petrography and geochemistry, a process of seepage reflux of mesosaline or hypersaline fluids during the early stages of burial diagenesis is proposed for the formation of the stratabound dolomite. In contrast, the fault-related dolomite geobodies are trending along a fault that can be followed for at least 100 m (328 ft) and vary in width from a few tens of centimeters to as much as 10 m (sim1–33 ft). Petrography, geochemistry, and high homogenization temperature of fluid inclusions all point to the formation of the dolomite along a normal fault under deep burial conditions during the Middle to Late Cretaceous. The high 87Sr/86Sr ratio in the dolomite and the high salinity measured in fluid inclusions indicate that the dolomitizing fluids are deep basinal brines that interacted with crystalline basement. The dolomitization styles have an impact on the dimension, texture, and geochemistry of the different dolomite geobodies, and a modified classification scheme (compared to the one from Jung and Aigner, 2012) is proposed to incorporate diagenetic geobodies in future reservoir modeling.
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Explorer Article

 

Discoveries were comparatively sparse, but they persisted steadily throughout the year. Here are some of the more significant discoveries of the past year.

American Association of Petroleum Geologists (AAPG)
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Rocky road to success: AAPG member Simon Donato found adventure and much more – when he accepted the personal challenge of finding archaeological sites in the rugged and dangerous mountains overlooking the Strait of Hormuz.

American Association of Petroleum Geologists (AAPG)
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Graduate students representing the University of Texas at Austin won first place in this year’s AAPG Imperial Barrel Award contest, taking the prize after a “spirited and intense competition.”

American Association of Petroleum Geologists (AAPG)
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Distinguished Lecturer Steve Dorobek’s Asia Pacific Region tour, originally slated for March, has been delayed until May – but the AAPG DL program will remain active in March with four speakers ready to tour.

American Association of Petroleum Geologists (AAPG)
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Explorer Emphasis

 

Every major producer in the Middle East will be represented at AAPG’s upcoming GEO 2016 conference in Bahrain next month.

American Association of Petroleum Geologists (AAPG)
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Improved imaging technology has helped explorationists in the Sultanate of Oman reawaken a sleeping giant.

American Association of Petroleum Geologists (AAPG)
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An added dimension: 3-D seismic data is an essential ingredient in operators’ efforts to understand the risks and nuances of shale plays.

American Association of Petroleum Geologists (AAPG)
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Explorer Foundation Update

 

It has a new name, a new energy and a new lineup of experts, all primed to spread geoscience knowledge around the world. “It” is AAPG’s newly named Global Distinguished Lecture Program – emphasis on the “global” – which dates back to 1941 but continues to be the Association’s flagship initiative for offering the latest in geologic science to AAPG affiliated geological societies and universities.

American Association of Petroleum Geologists (AAPG)
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Explorer Spotlight On…

 

Geoscience students from the University of Utah took the top prize in this year’s AAPG/AAPG Foundation Imperial Barrel Award competition, beating out 10 other teams from geoscience departments from around the world.

American Association of Petroleum Geologists (AAPG)
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Field Seminar

Houston Texas United States 06 April, 2017 06 April, 2017 36592
 
Houston, Texas, United States
6 April 2017

This field trip focuses on the late Quaternary depositional systems of the upper Texas coast, including the Brazos River and its wave-dominated delta, the Oyster Creek meanderbelt, Follets Island, the San Luis Pass tidal delta, and Galveston Island. The trip will emphasize the physical processes associated with shaping these various depositional environments, and will discuss the stratigraphic occurrence of sand bodies associated with these coastal systems. There will be a focus on linking physical processes to the geological record, and also describing the sequence stratigraphic framework of the upper Texas coastal systems.

Short Course

Houston Texas United States 02 April, 2017 02 April, 2017 35016
 
Houston, Texas, United States
2 April 2017

Practitioners of many of the eastern martial arts such as tae kwon do and karate adhere to a code of honor. An integral part of martial arts training include learning the tenants of that code of honor.

Houston Texas United States 01 April, 2017 01 April, 2017 34922
 
Houston, Texas, United States
1 April 2017

The course has multiple objectives: (1) understanding basic geochemical data and applying these data to shale resource plays, (2) advanced approaches to refine and identify sweet spots in existing plays.

Houston Texas United States 06 April, 2017 07 April, 2017 35075
 
Houston, Texas, United States
6-7 April 2017

This course is designed to provide the industry geologist and engineer with a working knowledge of fracture characteristics and variability as they affect production in hydrocarbon reservoirs. This is a hands-on, applied course in fracture interpretation, description, analysis, and effects.

Houston Texas United States 06 April, 2017 07 April, 2017 35077
 
Houston, Texas, United States
6-7 April 2017

This two-day workshop provides an introduction to the application of carbonate facies, diagenesis, and seismic sequence stratigraphy to exploration and production. This includes marine, and conventional and unconventional carbonate reservoirs.

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