En wikipedia hay una lista de reifnerias, la mas grande del mundo se encuantra en venezuela.

http://en.wikipedia.org/wiki/List_of_oil_refineries

Aqui hay una lista de las mas grandes refinerias (segun este articulo)

World's Largest Refineries (Barrels/Day)
Name of Refinery Location Barrels per Day
Paraguana Refining Complex (CRP) - Amuay and Cardón Venezuela 940,000
SK Energy Co., Ltd. South Korea 840,000
Reliance Industries I1 Jamnagar, India 661,000
GS Caltex South Korea 650,000
ExxonMobil Singapore 605,000
Reliance Industries II1 Jamnagar, India (under construction) 580,000
ExxonMobil Baytown, TX, USA 557,000
S-Oil South Korea 520,000
Hovensa LLC Virgin Islands 495,000
ExxonMobil Baton Rouge, USA 493,500
Mina Al-Ahmadi Refinery, KNPC Kuwait 470,000
BP Texas City Texas City, TX, USA 460,000
Shell Eastern Singapore 458,000
Abadan Refinery Iran 450,000
Citgo Lake Charles Lake Charles, LA, USA 425,000
Shell Pernis Refinery Netherlands 416,000
BP Whiting Refinery Whiting IN, USA 410,000
Saudi Aramco Yanbu Refinery Saudi Arabia 400,000
Total Refinery Antwerp Belgium 360,000
ExxonMobil Beaumont TX, USA 348,500
Sunoco Philadelphia, PA, USA 335,000
Valero Port Arthur TX, USA 325,000
Motiva Port Arthur TX, USA 325,000
ConocoPhillips Wood River IL, USA 306,000