Downhole Processing and Interpretation

1. Formation of the base of source geological and geophysical data:
   • creation and analysis of the well stock indicating the area, date of drilling and altitude marks;
   • completed well logging complex;
   • wellhead coordinates;
   • inclinometry;
   • intersection coordinates;
   • breakdowns of formations received from the Customer and / or from stock literature;
   • GIS data interpretation results received from the Customer;
   • core research results;
   • test results;
   • perforation intervals;
   • production and injection data.
2. Well section correlation:
   • stratigraphic division of the section into complexes, suites, layers, packs with the allocation of reference horizons, consistent with seismic data;
   • detailed correlation;
   • mapping of principal geological models for paleological conditions of sedimentation;
   • the resulting data are correlation schemes, stratigraphic breakdown tables and maps of principal geological models.
3. Processing and interpretation of GIS data:
   • GIS quality analysis;
   • analysis of core-core relationships in order to create a reservoir model and refine petrophysical relationships;
   • analysis of core-GIS relationships to justify the methodology for interpreting GIS data;
   • establishment of boundary values "collector-non-collector" and "oil-water";
   • GIS data processing with determination of effective and efficient oil and gas saturated thicknesses, porosity, oil saturation, permeability coefficients;
   • analysis of the reliability of determining the FES;
   • special processing of well logging data for wells in which GGK, AK studies were performed with an estimate of speed, density, lithology and saturation (for linking with seismic data);
   • construction of models of transition zones;
   • the resulting data are: petrophysical reservoir models (petrophysical equations, boundary values of the parameters); digital representation of layer-by-layer and layer-averaged petrophysical interpretation of GIS; pallets models of transition zones.

GIS materials are processed in the DV-Geo software package, which allows you to perform all necessary procedures for lithological separation, collector selection, taking samples, determining the electrical resistivity of the collectors, assessing the nature of saturation, calculations using formulas to determine the estimated parameters ..

The results of the interpretation of GIS data - reservoir intervals with an assessment of the nature of saturation and the estimated parameters in them - can be presented both in pointwise and in layered versions in graphical form, as well as in the form of tables of layer-by-layer, layer-by-layer processing. The results obtained are the basis for calculating reserves and three-dimensional geological modeling of productive objects.

The advantage of the proposed services for working with GIS materials is the rich experience in interpreting a variety of geological and geophysical information accumulated by the specialists of JSC “TsGE” on deposits in various regions of Russia and abroad and the skills of handling large volumes of data.