Chevron Corporation (CVX) on Thursday said it has asked Brazilian authorities to allow a temporary shutdown of production from its Frade oil field off the coast of Brazil after a new oil seep was detected.

"The decision to request the temporary shut-in of production is a precautionary measure," Chevron said in a statement. "Chevron has identified a small new seep in the field and subsidence in the area."

The drilling accident at Frade on Nov. 7 caused an oil spill at Frade, which lies in deep Atlantic waters off the coast of Rio de Janeiro state. An estimated 2,400 to 3,000 barrels of crude oil to seep into the sea from cracks in the seabed.

Chevron was ordered to stop new drilling at the site, and Brazilian authorities have levelled a number of fines. Additionally, Chevron and rig operator Transocean Ltd. (RIG, RIGN.VX) also face a 20 billion Brazilian reais ($11.8 billion) civil suit.

The Frade field currently produces about 60,000 barrels per day, the company said. Following an order from the oil regulator, the ANP, in December, Chevron suspended water reinjection in four wells in the field.

Chevron said it will conduct a technical study and prepare a complementary study to better understand the geological features of the area, working with its partners and seeking necessary approvals from the oil regulator, the ANP.

Chevron has a 52% operating interest in Frade, while Brazil's Petroleo Brasileiro SA owns 30% and Japao Petroleo Ltda., a joint-venture company of INPEX, Sojitz and JOGMEC, owns the remaining 18%.

-By Diana Kinch and Matthew Cowley, Dow Jones Newswires; +55 11 3544 7082; brazil@dowjones.com

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