Kinito, in the 22nd minute, opened the scoring, and Megue, in the 77th minute, sealed the result.
Petro de Luanda will play again on Sunday, in the semi-finals, against Interclube, coached by the Portuguese Luís Gonçalves, who eliminated 1.º de Agosto by 2-0, with goals from Além, in the 14th and 24th minutes.
Desportivo da Huila, owned by Paulo Torres, had a different fate, as they were eliminated after losing 3-1 to Académica do Lobito.
Jepson, at 13 minutes, Dos Santos, at 14 and 55, scored the goals, and Adó Pena, at 87, reduced the disadvantage.
Kabuscorp do Palanca, who will face Académica do Lobito in the semi-finals, beat Isaac de Benguela by 2-1, with goals from Muller, at 35, and Dimitri, at 74, while Quinho, at 22, scored for the deleted.