Geology, geography and global energy

Scientific and Technical Journal

Methods of marine geophysical operations

2015. №3, pp. 80-89

Serebryakov Andrey O. - Senior Lecturer, Astrakhan State University, 1 Shaumyan sq., Astrakhan, 414000, Russian Federation,

Serebryakov Oleg I. - D. Sc. in Geology and Mineralogy Professor, Astrakhan State University, 1 Shaumyan sq., Astrakhan, 414000, Russian Federation,

Geophysical work is done for lithological identification and structural mapping of the variations of sedimentary rocks, study of gas accumulations, as well as various other significant complications for marine geological research. In marine practice, the most rational use of dual-frequency continuous seismoacoustic profiling (NSAP), while allowing for the passage of the profile to obtain information about the geological structure of sedimentary rocks in two frequency ranges. The predominant frequency of 4000 Hz is used for the study of sediment below the seabed with a resolution of not less than 0,5 m. For this purpose, is applied electrodynamic source of elastic waves type "Boomer" with radiated energies up to 500 joules. The working frequency of 400-600 Hz (electrical spark source of elastic waves type "Sparker") is used to cover the bottom structure of the rock mass below the level of the bottom of the sea with a resolution not worse than 2,0 m.

Key words: геофизика, литология, породы, акватория, профилирование, диапазон, geophysics, lithology, rocks, waters areas, profiling, band