The "Seismocyclit" group carries out processing of customer's geophysical data and search for oil and gas pools, using its own exclusive methodology. The proposed methodology includes original methods of processing and interpretation of geophysical data, realized in form of programme-methodical complexes (PMC) "Seismocyclit" and "AFCM" (amplitude-frequency characteristic of medium).
It allows:
- To carry out construction of stacks with improved signal-to-noise ratio,
eliminating regular and irregular unwanted signals, which do not respond to the principle
of reciprocity in seismic survey.
- To accomplish stratigraphic identification of the reflecting horizons,
using logs in form of cyclites.
- To discover structural features of the geological section,
and ways of migration - hydrocarbon delivery channels, which often coincide with
tectonic failures.
- To single out zones, where reservoirs and impermeable beds are developed. For these
goals, the sections of "AFCM" (amplitude-frequency characteristic of medium) are used, which
are characterized by important and distinctive feature: the calculation of colour
instead of it's assignment. Changing of the colour on the "AFCM" sections shows that
the reservoir characteristics of the section change. In the given variant of calculation,
horizons of the reservoirs are displayed on the "AFCM" sections in dark blue and black colour.
The efficiency of this methodology is proven on a number of structures and fields connected to
various types of sections. On the presented "AFCM" sections, four boreholes (red colour)
are shown, which were drilled with the help of our recommendations and have given the
production in terrigenous section.
In the last years programme-methodical complexes (PMC) "Seismocyclit" and "AFCM" - amplitude-frequency characteristic of medium have been effectively used for prognosing traps in Upper Jurassic carbonate section of Precarpathian deep.
On the "AFCM" section in the upraised block of Upper Jurassic deposits, the extensive zone of reservoirs development can be pointed out, whose presence is proven by the results of boreholes testing. In the upraised part of the sinked block we can point out similar zone which is prospective.
- To prognose the presence of hydrocarbons in trap. For this prognosing there
is a need to use the data of electrical prospecting, which help to calculate longitudinal electrical
resistance on several deep levels. The existence of structural form and higher resistance
on certain stratigraphic levels is a prospecting indication that hydrocarbons are present
in the structure.
The proposed methodology of hydrocarbon pools forecasting can be used
at any stage of geological prospecting works, significantly raising their efficiency.
