The Turpan-Hami or Tuha Basin is situated in the Xinjiang Uygur Autonomous Region. Oil production from the basin peaked in 2000, but has been in steady decline. Gas production followed a similar pattern, peaking in 2005 and declining ever since. Gas is supplied to the city of Urumqi for industrial and residential use. The Lukeqin heavy oil field has been the focus of development in recent years.