** Indian upstream oil companies ONGC ONGC.NS, Oil India OILI.NS rise 2.1% and 2.9%, respectively
** Oil prices rose 4% on Wednesday as traders priced in potential supply disruptions amid concerns of U.S.-Iran conflict O/R
** Downstream firms like Indian Oil Corp IOC.NS, Hindustan Petroleum Corp HPCL.NS, BPCL BPCL.NS lose between 0.8% and 1.5%
** Higher oil prices weigh on margins of oil marketing cos
** YTD, ONGC rises ~12.3%, OILI gains ~10%
(Reporting by Brijesh Patel in Bengaluru)
((Brijesh.Patel1@thomsonreuters.com; Ph no. +91 9590227221;))