Uchenna Izundu
International Editor
LONDON, Nov. 28 -- PetroQuest International has acquired 2,500 line-km of seismic data off Seychelles in the East Africa island nation's first seismic work in 14 years.
"It is being processed at the moment, and the government is keen to build on its oil and gas business," said Chris Matchette-Downes, vice-president of business development at Black Marlin Energy Ltd., which is conducting geophysical work for PetroQuest.
PetroQuest's 20,000-sq-km block is in the southern portion of the Seychelles plateau (see map, OGJ, July 6, 1998, p. 85). The reservoir is believed to be coarse-grain Karoo sandstones with porosities of up to 23% at 8,000 ft for the reservoir horizon.
"Over 15 large structures were mapped by Texaco and Amoco in the past," Matchette-Downes said. "New seismic has verified the presence of large leads." Oil shows and locally derived tars have been classified as having come from Paleozoic and Lower Mesozoic regional sources.
The seal comprises interbedded shales and a thick Cretaceous shale section.
Contact Uchenna Izundu at [email protected].
