** Shares of State Gas GAS.AX fall 7.4% to A$0.025, its lowest level since April 9

** Stock marks worst intraday pct drop since May 13

** Oil and gas explorer says landowner blocks access to co's Rolleston West Exploration Project in Queensland

** Co approaches Land Court of Queensland to intervene

** Stock down 35.9% this year, including the day's move

(Reporting by Shivangi Lahiri in Bengaluru)

((shivangi.lahiri@thomsonreuters.com))