** Shares of U.S. oil and gas firms gain premarket, tracking
higher oil prices
** Brent crude LCOc1 up 1.77% and U.S. West Texas
Intermediate (WTI) crude CLc1 advances 1.70% as investors turn
cautiously optimistic over the fading risk of a U.S. debt
default O/R
** Oil majors Chevron Corp CVX.N and Exxon Mobil Corp
XOM.N rise 0.8% and 0.9%, respectively
** Oil producers Diamondback Energy Inc FANG.O , Devon
Energy Corp DVN.N , Ovintiv Inc OVV.N , Callon Petroleum Co
CPE.N , Occidental Petroleum Corp OXY.N and EOG Resources Inc
EOG.N gain between 0.9% and 2.5%
** Oilfield services firms Halliburton Co HAL.N and SLB
SLB.N climb 1.3% and 1.1%, respectively
** United States Oil Fund LP USO.P up 1.5% and ProShares
Ultra Bloomberg Crude Oil UCO.P rises 2.97%
(Reporting by Ankit Kumar)
((Ankit.Kumar2@thomsonreuters.com))