GEOCHEMICAL EXPLORATION METHOD Russian patent published in 2012 - IPC G01V9/00 

FIELD: petroleum geology.

SUBSTANCE: exploration results enable distinguishing flooded river valleys that cross the continental shelf. Bottom sediments shall be profiled with acoustic impulses. The topographical relief is reconstructed. The structural denudation relief forms are analyzed specifying terrigenous deposits. Then rocks and vegetation along water passages are sampled. Rock samples are fractionated into fractions of over than 0.1 mm and fractions less 0.1 mm, wherein the fist fraction shall is analyzed for Si, Al, Ti, Y content while the latter is analyzed for Hg content. Vegetation samples shall be analyzed for Ba, Cu, Pb, Zn, Ag content. Results of analysis of fractions over 0.1 mm and vegetation samples shall be re-calculated according the corresponding additive indices of usage concentrations. Distribution maps of the above additive indices and Hg are made, the facilities characterized by anomalous additive indices and Hg as to the range of for Si, Al, Ti, Y - Ba, Cu, Pb, Zn, Ag - Hg - Ba, Cu, Pb, Zn, Ag - Si, Al, Ti, Y are identified as oil-and-gas promising areas. If conditions for oil-and-gas promising areas exist, the subsoil is probed in a radial, in an axial and in a tangential direction, wherein such probing is performed by spin-phonon interaction detection mechanisms, the exploration target being exposed to a coherent impulse proton spin echo. The image of the axial soil section is tomographically reconstructed at the polygonized crystals level.

EFFECT: enhanced reliability of oil-and-gas promising areas detection.

1 dwg, 1 dwg