** U.S.-listed oil and gas companies' shares up 2-6 pctpremarket
** Oil rose on Tuesday as BP announced a cut in capitalexpenditure for 2015
** Oil has gained more than 15 pct since Thursday after datashowed the number of U.S. drilling rigs had fallen the most in aweek in nearly 30 years
** Brent crude futures up 2.96 pct at $56.37 perbarrel; U.S. crude up 2.7 pct at $50.88 per barrel
** Oil and gas producers: BP Plc up 2.4 pct at$40.80, Energy XXI Ltd up 5.8 pct at $3.45, BreitBurnEnergy Partners up 4 pct at $8
** Oilfield services providers: Denbury Resources Inc up 4 pct at $8.06, Baker Hughes Inc up 2.3 pctat $61.12, Halliburton Co up 2 pct at $42.30
** Contract drillers: Transocean Ltd up 5 pct at$18.14, Nabors Industries Ltd up 3.1 pct at $12.38
BP (BP.)