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Srinivasa Rao, P. L.
- Light Hydrocarbons Geochemistry of Surface Sediments from Pranhita-Godavari Basin, Andhra Pradesh
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1 Stable Isotope and Surface Geochemical Prospecting of Hydrocarbon, National Geophysical Research Institute (Council of Scientific and Industrial Research), Uppal Road, Hyderabad – 500 606, IN
1 Stable Isotope and Surface Geochemical Prospecting of Hydrocarbon, National Geophysical Research Institute (Council of Scientific and Industrial Research), Uppal Road, Hyderabad – 500 606, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 78, No 5 (2011), Pagination: 477-483Abstract
A geochemical study of surface sediments from Pranhita-Godavari Basin, Andhra Pradesh, India was carried out using light hydrocarbon compounds to assess the hydrocarbon potential of the basin. Suite of 80 soil samples were collected from the depth of 2.5 m and analyzed for adsorbed light gaseous hydrocarbons namely methane (CH4), ethane (C2H6) and propane (C3H8) in Gas chromatograph. Compound specific Carbon isotope ratios for CH4 and C2H6 were also determined using GC-C IRMS (Gas Chromatograph Combustion Isotope Mass Spectrometer). The presence of moderate to low concentrations of methane (CCH4: 1 to 138 ppb), ethane (CC2H6: 1 to 35 ppb) and propane (CC3H8: 1 to 20 ppb) was measured in the soil samples. Carbon isotopic composition of δ13CCH4 ranges between -27.9 to -47.1 ‰ and δ13CC2H6 ranged between -36.9 to -37.2 ‰ (V-PDB) indicating that these gases are of thermogenic origin. Study of soil samples suggests the area has good potential for hydrocarbon.Keywords
Soil Gas, Light Hydrocarbons, Carbon Isotopes, Pranhita-Godavari Basin, Andhra Pradesh.
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