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

Muscat Oman 27 October, 2017 28 October, 2017 37063
 
Muscat, Oman
27-28 October 2017

Field Trip: Reservoir Scales and Heterogeneities and their Impact on Project Decisions
Date: 27 — 28 October 2017
Field Trip Location: Northern Huqf Gharif Formation (Clastics)
Field Trip Registration Fee: $1450 (includes transportation, all f&B and camping equipment)
Registration Deadline: 24 September 2017

Field development requires certain decisions to be made depending on field life and each decision will require a specific type of model. The field trip will focus on aspects of sediment body geomentry, facies and linked reservoir properties as well as field scale barriers and baffles.

The Upper Gharif Formation is composed of fluvial sandstones with an overlying incised valley fill estuarine sequence leading to transgression of Khuff Carbonates. Stacking of channels, net to gross and potential barriers and baffles can be observed in these outcrops as well as facies variations.

Day 1: Travel to Northern Huqf by 4x4 vehicle and investigate outcrops. Camp overnight.

Day 2: Northern Huqf outcrops. Return to Muscat

Register Now

Workshop

Muscat Oman 30 October, 2017 01 November, 2017 32799
 
Muscat, Oman
30 October - 1 November 2017

Unlike many workshops with focus on new technologies for doing “this” or “that”, this workshop is going to focus on “doing the right thing” for the “right reasons”. The outcome of Decision Based Integrated Modeling is expected to allow making better and more effective decisions faster.

Muscat Oman 08 May, 2017 10 May, 2017 32794
 
Muscat, Oman
8-10 May 2017

The workshop aims at providing a state of the art review of the contrasted structural styles of the Middle East. Based on this review, a focus should be dedicated to the implications of these regional styles and structural evolutions on the region's economical prospectivity in terms of hydrocarbon resources. Among others, the specific challenges occurring during the exploration and production of these resources should be tackled …

Muscat Oman 27 March, 2017 29 March, 2017 32795
 
Muscat, Oman
27-29 March 2017

The fourth edition of the E&P Data Management and Analytics workshop is jointly organised by SPE and AAPG, and will bring together various geoscience and engineering disciplines to explore the role of the data management and analytics community in enabling capital efficiency.

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