Title : Discovery of rare helium gas in Sagar district, Madhya Pradesh
Abstract:
The discovery of the rare gas helium in hydrocarbon rich zone has been done in the Garhakota and Rahatgarh tahsil of Sagar District in M.P., is a unique finding in the history of Earth Science in India. It is remarkable to note that values of helium contents varies from 0.34 % to 0.732 % along with the 72% to 99% of methane and ethane, and minor amount of oxygen, nitrogen and Co2 gases in the hydrocarbon rich zone are recorded during the geochemical and stable isotope analysis. It has been found in the stable isotope δ C13 value the values for the methane is -43.6 per mil w.r.t. to 54.9 per mil w.r.t. PDB and for the Ethane gas is --24.9 to --26.4 per mil w.r.t. PDB in the gas samples collected in the saturated sodium chloride solution in the glass bottles at Rahatgarh, Meerkheri, Piparia, Bhutoli villages in Sagar District. The occurrence of rare helium gas in the Hydrocarbon rich zone is reported first time in Jan, 2007 from the tube wells of Sagar Distt, which were geochemically and stable isotopically analyzed at KDMIPE Dehradun & NGRI Hyderabad. The Result of the stable isotopic analysis of Ethane gas in these samples δ C13 value are ranging from -24.9 per mill w.r.t. PDB and -26.9 per mill w.r.t. PDB are indicative that this gas his of thermogenic origin, which must have been formed at very high temperature & pressure condition in the deeper horizon of the great Vindhyan sedimentary basin of early Proterozoic (>500m.y.) period.
