Having set the world’s water-depth record for a combineddrilling and production platform, Exxon Mobil Corp.’s Hoover andDiana fields now are averaging 140 MMcf of gas and 18,000 barrelsof oil per day from five wells, and contain estimated recoverableresources that exceed 300 million oil-equivalent barrels.

The startup of oil and gas production in the Gulf of Mexico wasfirst announced last week with the gas flowing through therecently-completed East Breaks Gathering System, an 85-mile,20-inch diameter pipeline running from water depths of 440 feet to4,700 feet in the Gulf of Mexico. The Hoover Diana development islocated 200 miles south of Houston in 4,800 feet of water.

ExxonMobil said that the $1.1 billion project to co-develop thetwo fields will produce peak daily rates of 100,000 barrels of oiland 325 MMcf/d of gas. ExxonMobil is operator with a 66.7% interestin the project and BP Amoco holds 33.3% interest.

“The Hoover Diana project is a major technological milestone forproducing in the deepwater environment,” said Harry J. Longwell,senior vice president. He said the technology used in the Gulf willbe “applied to subsequent developments around the world.” He addedthat deepwater oil and gas is expected to account for more than 20%of ExxonMobil’s production by 2010.

ExxonMobil holds the largest deepwater prospective acreageposition in the industry, with 136 million acres in various places,including the Gulf of Mexico, West Africa and South America, andhas participated in 30 deepwater discoveries.

The Hoover Diana development is using a Deep Draft CaissonVessel (DDCV) over the Hoover field that floats vertically. It is83-stories high, and is nearly half a football field in diameterwith drilling and production facilities. The Diana field, 15 mileswest of Hoover, is a subsea development that uses five horizontallycompleted wells tied back to the DDCV.

Carolyn Davis, Houston

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