Combustibles 2 Combustibles fs̤iles 2 Fossil fuels 2 Fuels 2 gas natural 2 natural gas 2 operaciones 2 rhagor ... operations petrl̤eo 2 petroleum 2 procesos 2 processes 2 refinacin̤ 2 refining 2 reservoirs 2 reservorios wellheads 2 Industria del petrl̤eo 1 Industria petroqum̕ica 1 Petrochemical industry 1 Petroleum industry 1 Petroleum refineries 1 Refinera̕s de petrl̤eo 1 energa̕ 1 energy 1 energy sources 1 fuentes de energa̕ 1 heavy marine transport 1 industria del petrl̤eo 1 industria petroqum̕ica 1 llai ...