The Indo-Brazilian pair needed only 53 minutes to outplay the locals 6-2 6-2 in the quarterfinals.
Sania and Soares broke their rivals two times each in both the sets. They did not face any breakpoint in the opening set and saved the two in the second.
They now await winners of the other last-eight match between third seeds Kristina Mladenovic/Daniel Nestor and fifth seeds Cara Black/Juan Sebastian Cabal.
Meanwhile, in the boys singles, Sumit Nagal's campaign ended with a crushing 1-6 1-6 defeat against Australia's Marc Polmans.