Block 18, a 21,140 sq km concession located off the Batinah coast, was relinquished by the conglomerate's wholly-owned Dubai-based subsidiary, Reliance Exploration and Production DMCC.
The decision follows an exploratory drilling campaign that failed to unearth any significant prospects, the Oman Daily Observer report said.
The move comes six years after Reliance inked a deepwater Exploration and Production Sharing Agreement with the Oman government for Block 18 in the Sohar Basin in June, 2005.
While withdrawing from the concession, Reliance stated that the results of its drilling campaign targeting Block 18 had 'not been encouraging'.
It estimated the total expenditure incurred on Block 18, as well as another block in East Timor, at $177 million, the report
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