Geochemical prospecting (or exploration) methods for petroleum and natural gas deposits at and near the surface of the ground and the offshore area have not achieved the popularity of geophysical methods. Geochemical methods have been used widely in both the united states and the soviet union, and many new discoveries have been reposrted from these …
Over the past several decades the philosophy of exploration for oil and gas has pro• gressively changed from drilling on surface seepages to the concept of structural traps, com• plemented later by considerations of sedimentology in relation to the development of reser• voirs, which led to the concept of stratigraphic traps. …
•The petroleum geochemist seeks to determine if rocks contain organic quantity and o~ the appropriate type to source those rocks have been heated sufficiently to allow the He will also try to ~stkblish if hydrocarbons have been generated before, and faulting, and if the rate of heating has varied with time associated wiith tectonic causes. Jf …