Welcome to Meers Microseep Surveys

Benzene, C6H6 is a heavy aromatic hydrocarbon found only in crude oil. Its buoyancy carries it to the surface from oil reservoirs with other lighter hydrocarbons. High concentrations of Benzene are usually found over (apical) shallow reservoir, or around (Halo) deeper reservoirs.

The concentration of hydrocarbons in the near surface soils causes a chemically reducing environment. Magnetism is destroyed by oxidation of magnetic minerals to nonmagnetic minerals. This is similar to rusting iron losing its magnetism. The presents of hydrocarbons inhibit oxidation of the minerals since the hydrocarbon is more readily available to accept the oxygen atom changing it to an alcohol leaving the magnetic mineral in its original chemical state. This interaction of the hydrocarbon and oxygen causes the secondary effect of high magnetism in the area of the microseep. 

Hydrocarbons react with gypsum in the soils and ground waters to cause precipitation of caliche and other carbonate minerals. The formula shown below demonstrates this reaction.

CH4 + CaSO4 = CaCo3 + H2S + H2O

Methane + Gypsum = Caliche + Hydrogen Sulfide gas + water

Ca can be replaced by Sr and / or U that are found in crude oils

Radiometric analysis of Uranium, Potassium, Bismuth, and Thorium give indications of hydrocarbon microseepage. Concentrations and ratios give distinct anomalies associated with oil and gas reservoirs.

Blending the Benzene, Magnetic Susceptibility, Radiometric defined mineralization, and carbonates shows the absolute microseep geometry that defines subsurface oil reservoirs. Some of the indicators present in "Halo" geometry while others have an "Apical" presentation. The geometry gives a unique signature to the reservoir. 

Geochemistry will aid in finding those elusive strat-traps.

Please view the PDF below for detailed geochemical information and examples.