** India's upstream oil companies ONGC ONGC.NS and Oil India OILI.NS rise 1.8% and 3.6%, respectively
** Both stocks set for fourth consecutive session of gains, if current momentum holds
** Brent crude oil prices rise to seven-week high on Tuesday, before easing 0.2% on the day O/R
** Fears of disruption in Iranian oil supply boosts the commodity's prices
** Over 5 million OILI shares trade on the day, 2.5x of 30-day average volume; ONGC volumes also surpass 30-day average
** ONGC up 3.4% this year, while OILI up 10.2%
(Reporting by Vivek Kumar M)
((vivekkumar.m@thomsonreuters.com))