Soil Gas Measurements of Radon, CO2 and Hydrocarbon Concentrations as Indicators of Subsurface Hydrocarbon Accumulation and Hydrocarbon Seepage

Soil gas measurements of radon (222Rn), CO2, and hydrocarbon concentrations, as well gamma-ray spectrometry, were conducted at two separate locations to estimate the measurement results for known accumulations in subsurface oil seepage on surface. The aim study was confirm applicability method identifying migration pathways (e.g., faults) detect possible seepages hydrocarbons surface investigate health issue potential about soil analysis results. Site A investigations performed with a large number sampling points provide sufficient spatial coverage capture influence lithologic variability pathway measured parameters. For investigation site B, positioned reflect situation between area above producing fields areas no confirmed accumulation. presented show that it is distinguish near-surface lithology (gamma-ray spectrometry), characterize pathway, indicate Areas generally have elevated concentrations detectable heavier sporadic methane gas, which contrasts lower levels lack accumulation subsurface.