The Application Of Non-seismic Exploration Methods In Concealed Structure Study

Seismic exploration is the main way among the ways to explore petroleum. But it has high costs, long period and is being affected by some geology and working conditions and other defects. This thesis applied non-seismic methods, taking Shitingjiang area as example, to study concealed structure and find concealed fault. Through it, seismic datum got new interpretation. It shows the significance of non-seismic in petroleum exploration.It is the first time to study concealed tectonism by remote sensing, geochemistry,geogas,radiometric Rn in Shitingjiang area. And discover WN-ES concealed fault. And form germinative lozeng fault depression in the end of left folded area of left lateral strike-slip fault. Under the guidance of non-seismic study production, seismic profile got new interpretation. And by it, the track of concealed fault in deep was found. Drape of mud and shale of J₃P was pierced by concealed fault and it destroys petroleum reserved condition to some extent. The nature gas which lie supergene strata leak to surface along concealed fault is the reason why it formed geochemical abnormity in surface soil.(1) Remote sensing geology interpretation linearity structure has some relation with existence of concealed fault.(2) Most of the abnormal distribution of Geochemical elements are along concealed fault or appear at fault crossing .This geochemical elements contain Hg, As,B, Bi, Sb in soil and K,F,Na,H₂SiO₃ in water.(3) There is abnormal distribution of radiometric Rn over the concealed fault. It is the first time to use geogas in bottomland, and having explored concealed fault covered by screes, enlarged application field of geogas.(4) By using AFM, it is proved that nanoparticle migrate upwards when it is carried by geogas, and probably form part increment of geochemical abnormity in...