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energy and fields

Eni makes gas discovery in Nour prospect offshore Egypt

by Umar Ali, March 15, 2019 in OffshoreTechnology

Italian oil and gas company Eni has announced a new gas discovery under evaluation in the Nour exploration prospect offshore Egypt.

The prospect is located in the Nour North Sinai Concession in the Eastern Egyptian Mediterranean, 50km north of the Sinai Peninsula. The concession covers a total area of 739km2, with water depths ranging from 50-400m.

This latest discovery was made at the Nour-1 New Field Wildcat (NFW) exploratory well, which was drilled by the Scarabeo 9 semi-submersible unit in a water depth of 295m, reaching a total depth of 5,914m.

The well has not yet been tested, but Eni said it had carried out an “intense and accurate” data acquisition.

The NFW well found 33m of gross sandstone pay in the Tineh formation of Oligocene age with “good petrophysical properties” according to Eni, as well as an estimated gas column of 90m.

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climate and geology

Weird science: Tectonics in the tropics trigger Earth’s ice ages, study finds

by Anthony Watts, March 15, 2019 in WUWT

Over the last 540 million years, the Earth has weathered three major ice ages — periods during which global temperatures plummeted, producing extensive ice sheets and glaciers that have stretched beyond the polar caps.

Now scientists at MIT, the University of California at Santa Barbara, and the University of California at Berkeley have identified the likely trigger for these ice ages.

In a study published in Science, the team reports that each of the last three major ice ages were preceded by tropical “arc-continent collisions” — tectonic pileups that occurred near the Earth’s equator, in which oceanic plates rode up over continental plates, exposing tens of thousands of kilometers of oceanic rock to a tropical environment.

The scientists say that the heat and humidity of the tropics likely triggered a chemical reaction between the rocks and the atmosphere. Specifically, the rocks’ calcium and magnesium reacted with atmospheric carbon dioxide, pulling the gas out of the atmosphere and permanently sequestering it in the form of carbonates such as limestone.

Over time, the researchers say, this weathering process, occurring over millions of square kilometers, could pull enough carbon dioxide out of the atmosphere to cool temperatures globally and ultimately set off an ice age.

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