Bulletin Article

3771
 

The Upper Jurassic Arab Formation in the Arabian Peninsula, the most prolific oil-bearing interval of the world, is a succession of interbedded thick carbonates and evaporites that are defined stratigraphically upsection as the Arab-D, Arab-C, Arab-B, and Arab-A. The Arab-D reservoir is the main reservoir in Khurais field, one of the largest onshore oil fields of the Kingdom of Saudi Arabia.

In Khurais field, the Arab-D reservoir is composed of the overlying evaporitic Arab-D Member of the Arab Formation and the underlying upper part of the Jubaila Formation. It contains 11 lithofacies, listed from deepest to shallowest: (1) hardground-capped skeletal wackestone and lime mudstone; (2) intraclast floatstone and rudstone; (3) pelletal wackestone and packstone; (4) stromatoporoid wackestone, packstone, and floatstone; (5) Cladocoropsis wackestone, packstone, and floatstone; (6) Clypeina and Thaumatoporella wackestone and packstone; (7) peloidal packstone and grainstone; (8) ooid grainstone; (9) crypt-microbial laminites; (10) evaporites; and (11) stratigraphically reoccurring dolomite.

The Arab-D reservoir lithofacies succession represents shallowing-upward deposition, which, from deepest to shallowest, reflects the following depositional environments: offshore submarine turbidity fans (lithofacies 1 and 2); lower shoreface settings (lithofacies 3); stromatoporoid reef (lithofacies 4); lagoon (lithofacies 5 and 6); shallow subtidal settings (lithofacies 7 and 8); peritidal settings (lithofacies 9); and sabkhas and salinas (lithofacies 10). The depositional succession of the reservoir represents a prograding, shallow-marine, reef-rimmed carbonate shelf that was subjected to common storm abrasion, which triggered turbidites.

Explorer Article

2725
 
Explorer Article

Renaissance era: Geoscience research – often more practical than theoretical – is enjoying a strong revival.

Explorer Director’s Corner

3799
 

Last month I had the privilege of traveling to the Middle East with AAPG President Lee Krystinik.

Explorer Division Column EMD

13237
 
Explorer Division Column EMD

Over the past year or so we have observed strong evidence that nuclear power is into a new expansion period.

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.
130
 
Explorer Emphasis Article

Three new research facilities divide their focus between downstream and upstream technology for Aramco Services.

1861
 
Explorer Emphasis Article

An added dimension: 3-D seismic data is an essential ingredient in operators’ efforts to understand the risks and nuances of shale plays.

Explorer Foundation Update

12439
 
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.

Explorer Historical Highlight

2185
 

The history of oil in the Middle East is essentially a story of giant oil fields (each containing over 500 million barrels).

Explorer Policy Watch

2836
 
Explorer Policy Watch

It’s common knowledge, and it’s wrong. The top suppliers of crude oil to the United States are Canada and Mexico.

Workshop

Afghanistan 18 May, 2015 20 May, 2015 12367
 
Afghanistan
18-20 May 2015

Save the date and watch here for details.

Dead Sea Jordan 08 June, 2015 10 June, 2015 10669
 
Dead Sea, Jordan
8-10 June 2015

Save the date and watch here for details.

Abu Dhabi United Arab Emirates 26 January, 2015 28 January, 2015 10665
 
Abu Dhabi, United Arab Emirates
26-28 January 2015

Check the website as details develop.

Kuwait City Kuwait 23 March, 2015 25 March, 2015 8560
 
Kuwait City, Kuwait
23-25 March 2015

This three-day workshop will be dedicated to sharing knowledge, ideas, and workflows pertaining to exploration for stratigraphically trapped hydrocarbon accumulations in the Middle East. The workshop will emphasize case studies involving both carbonates and clastics — in order to help focus explorationists in their search for these types of traps.

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