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12910
 
Energy Policy Blog

There may be job openings on Capitol Hill as some Senators and Representatives, and their staffs are replaced after the election. If you want to apply for one of those staff jobs check out HillZoo.com.

12909
 
Energy Policy Blog

Those of us in the petroleum industry have been tracking the rapid expansion of oil and gas production from shales and in the process we may not have noticed the rapid expansion of renewable energy, especially wind. Read the latest Energy Information Administration (EIA) statistics.

12908
 
Energy Policy Blog

China plans to significantly increase its natural gas consumption to help cut its appalling air pollution. But natural gas is still a small part of its energy mix. In addition, and to confound environmentalists, a significant part of China’s gas supply comes from Coal-to-Gas technology, which generates large volumes of greenhouse gas and other pollutants, but does allow China to deliver clean-burning gas to locations with severe air pollution.

10772
 
Preparation for the FIFA World Cup was not the only event attracting international audiences to Brazil in May. AAPG’s Geosciences Technology Workshop (GTW) Brasil, "Stratigraphic Traps and Play Concepts in Deep Water Settings," brought in 143 geoscientists representing 12 countries from the Americas, Europe and Asia.
10222
 

The Ayoluengo field, commonly cited as Spain’s only onshore oil field, was discovered in June 1964. Today, 50 years later, the field is still active, with an average production of some 100 barrels oil per day and a total cumulated oil production of nearly 17 million barrels of oil.

10218
 

The history of oil development in Alaska is often presented as a heroic tale, but long before the 1968 discovery of the Prudhoe Bay field (16 billion barrels and counting), the industry experience was marked by a great deal of frustration and failure.

9515
 

The Croatian Hydrocarbons Agency used AAPG’s Annual Convention and Exhibition (ACE) in Houston last month as an opportunity to formally announce that the country’s first offshore license round opened April 2 of this year.

9512
 

When it comes to U.S. energy policy, there arguably is no topic that creates more heated debate than that of the federal OCS (Outer Continental Shelf) leasing program.

7959
 

The petroleum trap for the Athabasca oil sands has remained elusive because it was destroyed by flexural loading of the Western Canada Sedimentary Basin during the Late Cretaceous and Paleocene. The original trap extent is preserved because the oil was biodegraded to immobile bitumen as the trap was being charged during the Late Cretaceous. Using well and outcrop data, it is possible to reconstruct the Cretaceous overburden horizons beyond the limit of present-day erosion. Sequential restoration of the reconstructed horizons reveals a megatrap at the top of the Wabiskaw-McMurray reservoir in the Athabasca area at 84 Ma (late Santonian). The megatrap is a four-way anticline with dimensions 285 x 125 km (177 x 78 mi) and maximum amplitude of 60 m (197 ft). The southeastern margin of the anticline shows good conformance to the bitumen edge for 140 km (87 mi). To the northeast of the anticline, bitumen is present in a shallower trap domain in what is interpreted to be an onlap trap onto the Canadian Shield; leakage along the onlap edge is indicated by tarry bitumen outliers preserved in basement rocks farther to the northeast. Peripheral trap domains that lie below the paleospillpoint, in northern, southern, and southwestern Athabasca, and Wabasca, are interpreted to represent a late charge of oil that was trapped by bitumen already emplaced in the anticline and the northeastern onlap trap. This is consistent with kimberlite intrusions containing live bitumen, which indicate that the northern trap domain was charged not before 78 Ma. The trap restoration has been tested using bitumen-water contact well picks. The restored picks fall into groups that are consistent both with the trap domains determined from the top reservoir restoration and the conceptual charge model in which the four-way anticline was filled first, followed by the northeastern onlap trap, and then the peripheral trap domains.

836
 
VG Abstract

With technical advances in surface seismic and downhole electrical imaging techniques, it is now possible to not only map the distribution of reservoir sandstones in the subsurface, but to accurately define the orientation of productive fairways, or “sweet-spots”, within the sequence.

Channel sands frequently have favorable reservoir characteristics. Having often been laid down in higher energy settings, they commonly have coarser and better sorted grains, less clay and improved poroperm characteristics. However, they often have limited lateral extent and shoe-string geometries which make them more difficult to predict in the subsurface.

This paper will summarize the results of four case studies and some additional examples of how channel sands, laid down in different depositional settings, have been recognized with borehole imaging. From sedimentary features and palaeocurrent directions within the sands it has been possible to determine their orientation.

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There are more approximately 1,000 oil and gas fields in the world that have been classified as "giant," containing more than 500 million barrels of recoverable oil and /or 3 trillion cubic feet of gas.

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