2D / 3D field Quality Control

Since the quality of field work inevitably affects the final results of the project as a whole, TsGE JSC takes responsibility for solving the general task of improving the quality of projects and performs the following work at the stage of 2D / 3D seismic survey:

• 2D / 3D field seismic design;
• project expertise;
• methodological and technological control (supervision) over the conduct of field 2D / 3D seismic surveys;
• performing field processing in order to control the methodology and technology for the production of 2D / 3D field seismic surveys;
• creation of methodological documentation for designing, methodological and technological control over the conduct of 2D / 3D field seismic surveys;
• field supervision of the implementation of Projects for the production of field seismic works 2D / 3D.

Field processing

Calculation of static corrections.

• MSC processing;
• calculation of static corrections;
• formation of effective SPS files;
• topography management;
• the construction of lithological columns for the section of wells MSK;
• gathering related seismic information.

All materials are collected in a single field database and are subsequently used for processing.

MSC treatment program allows for computer processing of borehole seismic observations and include the following:

• input and automatic / manual / picking of the first arrivals on seismograms;
• building a hodograph with the introduction of the necessary amendments;
• interactive processing mode;
• calculation of a priori static corrections for PV and PP;
• the conclusion of the geological column and geological description of the layers;
• entering processed information into a single database.

The refracted wave data processing program allows computer processing of refraction zones based on oncoming intersecting travel time curves with calculation of formation velocities and powers and includes the following:

• input and automatic correlation of first arrivals on seismograms;
• building a hodograph and calculating speeds;
• calculation of a priori static corrections for PV and PP;
• entering processed information into a single database.

Field processing of seismic data includes the following processing procedures (finally, the processing graph is determined after experimental work):

• conversion to internal format;
• geometry input;
• geometry control;
• edition of defective traces;
• amplitude recovery;
• entering static corrections;
• corrective filtering;
• CDP summation;
• speed analysis;
• correction of static corrections;
• summation;
• band pass filtering;
• output on paper of temporary cuts.

Additional processing procedures (performed at the request of the Customer):

• FK-filtering by source data;
• spectral balancing according to the source data;
• FK - filtering by total section;
• spectral balancing over the total section;
• additional output of temporary cuts on paper;
• additional data output to magnetic media (DVD, Exabyte, cartridge).

The results transmitted to the Customer are editorial libraries, cuts on paper and on magnetic media, SPS files on floppy disks.