Angola and the Democratic Republic of the Congo (DRC) are negotiating to end a maritime border dispute that involves several offshore deepwater oil reserve blocks. Kinshasa claims that the maritime boundaries that give Angola territorial control over much of the deepwater fields off the coast were delineated arbitrarily by Gulf Oil — now part of ChevronTexaco — more than 50 years ago, and are thus invalid, Reuters reported May 29. The sliver of DRC coastline that reaches to the Atlantic is wedged between Cabinda and Angola proper. Though no specific blocks have been named, the fields most likely to be affected by the dispute are those offshore from mainland Angola's coast and off the southern Cabinda coast, the Angolan enclave just north of the DRC's coastline. Included in this triangle are the Pitanguiera, Safueiro, Bananeira, Sapesapeiro, Essungo and Soyo fields offshore Angola's mainland.