HOUSTON, March 31 (Reuters) - Argentina's oil company Pluspetrol and its partners at blocks 88 and 56 at the Camisea field in Peru are offering to sell two 300,000 barrel cargoes of natural gasoline for delivery at Pisco port from April 25 to May 20, according to an invitation seen by Reuters on Monday.
Each month Pluspetrol and its associates normally sell 1-2 cargoes of virgin naphtha, natural gasoline, which is a natural gas liquid, or Peruvian crudes on the open market.
This month the firms offered two naphtha cargoes and one combining medium distillate blend stock and naphtha.
Pluspetrol detailed that it will receive offers until April 2 and they must be indexed to naphtha prices from Northwest Europe or Japan. Prices related to natural gasoline from Mont Belvieu will also be accepted.
Blocks 88 and 56 also include Spain's Repsol, U.S. Hunt Oil, Argentina's Tecpetrol, Algeria's Sonatrach and Korean SK Innovation. (Reporting by Marianna Parraga; Editing by)