The light hydrocarbons in soil are the guides to indicate the existence of reservoir through most Surface geochemical exploration. The light gaseous hydrocarbons (C1 to C5) in soils represent one of the widely accepted analytical approaches. The methodology involves the presence of surface manifestations of hydrocarbons, that are indicative of deep-seated petroleum reservoirs both onshore and offshore regions. The methodology approach is to collect the soil samples analyses of light hydrocarbon gases as methane, ethane, propane, butane and pentane. The contour maps of the analytical results are drawn and integrated with the geological, geophysical data to evaluate the hydrocarbon prospects and to prioritize the drilling locations thereby increasing success rate towards exploration. Thus, the surface geochemical surveys document the success ratio of nearly 82% of wells on prospects with a microseepage anomaly as resulted in oil and gas discoveries. The paper highlights the details of methodology adopted in terms of sample collection, processing, statistical data interpretation, identifying the anomalous zone as part of surface geochemical surveys.