deep water oil in Brazil

• how far is drilling going?


  6,000 meters
• what is the pre-salt layer?


  a diachronous (happened at different times in history) series of geological formations on the continental shelves

  common off the coast of Africa and Brazil
• why can Brazil easily access the deep sea oil?

  the pre-salt layers are in their exclusive economic zone
• why is deep water oil an unconventional fossil fuel?


  expensive and difficult