The terminal, one of the supporting facilities of PetroChina's 10-mln-ton-capacity refinery in Qinzhou, can accommodate one vessel of up to 100,000 dead load tons, the parent firm said.
The terminal includes two 100,000-ton-throughput crude berths and two oil products berths.
The Qinzhou refinery is designed to process crude oil sourced from CNPC's overseas oil projects, and is expected to come on stream this year.
State media earlier reported that the refinery will process crude from Sudan, and pipe oil products to Yunnan and Guizhou provinces via the Maoming to Kunming pipeline.