** Shares of Oil India Ltd OILI.NS rise as much as 3.1% to 410.25 rupees
** Crude oil and natural gas producer reports occurrence of natural gas in Andaman shallow offshore block
** Adds, preliminary analysis has confirmed presence of natural gas
** More than 1.4 mln shares traded as of 10:52 a.m. IST, nearly their 30-day moving avg of over 1.8 mln shares
** Average rating on stock by 19 analysts is "buy"; median PT is 517.5 rupees - data compiled by LSEG
** OILI last up 1.9% vs 1% gain in Nifty energy index .NIFTYENR
** YTD, OILI down 4.8% vs 0.02% advance in subindex
(Reporting by Meenakshi Maidas in Bengaluru)
((meenakshi.maidas@thomsonreuters.com;))