Geological and geophysical works

• Over 50 years of experience in processing and interpretation of geophysical data.
• Huge accumulated stocks of data on deposits of oil, gas and solid mineral resources in the territory of Russia.
• Highly qualified experts and modern software for processing and interpretation of seismic and integrated geophysical data, 2D- and 3D-modeling of seismic, gravimetric and magnetic fields.
• The data centers for processing and interpretation of geophysical information are located throughout the country, from Kaliningrad to Kamchatka.
• The geophysical crews are equipped with computerized instrumentation to ensure the field data quality.
• The seismic survey data are processed in the computer centers taking into account all confounding factors (complex topography, gas cap availability, permafrost, speed inhomogeneity, etc.), and with application of the state-of-art procedures and methodologies (DMO, AVO-analyses, elaboration of the substance velocity-depth model, prestack depth migration - PSDM, etc.)

The following scopes of works were completed in 2016-2019:

• processing of (new or archival) 2-D CDPM seismic data: 79.8 thousand linear kilometers.
• interpretation of (new or archival) 2-D CDPM seismic data: 79.8 thousand linear kilometers.

Computer technology of structural geodata analysis is an effective tool in geological prospecting process to be applicable in geological mapping, forecasting and explorations of different types of minerals, environmental monitoring. The technology is based on resolution of the geodata processing issues

• transformation (division of the data into components in accordance with the variability);
• noise filtration and error estimation of the transformants;
• lineament analysis;
• building-up of the geodata structure for individual observation methods, as well as integrated data on the surveyed area and effective geophysical parameters on the cross-section.

Advantages

• To achieve the objectives set we use the original software of structural analysis developed by Geologorazvedka, and protected by the copyright certificates
• The data obtained allow to produce the fully furnished and arranged maps.
• Over the last 10 years Geologorazvedka has developed the geophysical basis for geological maps of scale 1: 1000000 for a major part of the territory of the Russian Federation.
• More than half of the sheets are provided with geophysical basis composed based on results of structural analysis of the potential fields, airborne gamma-spectrometry and relief of the earth surface.

Set of surveys:

• High quality and efficient performance of 3D PSDM with any required scopes of seismic data;
• Elaboration and refinement of supporting deep-velocity model;
• Post-migration processing, including:

- scaling of results from depth into time;
- selection of optimal muting;
- accumulation;
- signal processing comprising the residual kinematic correction.

Advantages

The seismic migration analysis software developed by the experts of CGE is based on the most advanced mathematical models and technologies. This provided an opportunity for development of a highly efficient and modern software enabling to receive the practical results of the highest quality. Currently, RosGeo (CGE) possesses a production software capable to process Kirchhoff migration and extensive 7-years experience of its successful application in a wide variety of projects.

The seismic migration analysis software developed by the experts of CGE is based on the most advanced mathematical models and technologies. This provided an opportunity for development of a highly efficient and modern software enabling to receive the practical results of the highest quality. Currently, RosGeo (CGE) possesses a production software capable to process Kirchhoff migration and extensive 7-years experience of its successful application in a wide variety of projects.

RosGeo experts have years of experience in interpretation of borehole survey data received from the reservoirs of various types of complexity, fluid saturation, in many regions of Russia and abroad, as well as skills for big data processing.

We perform all necessary works on processing, analysis, interpretation of geophysical data in the purpose of calculation of the reserves and elaboration of digital (two- and three-dimensional) geological models:

• Development of geological and geophysical database;
• Correlation of the well logs;
• Borehole survey data processing and interpretation.

The borehale survey materials are processed in the software set DV-Geo.

The customer receives the borehall survey data interpretation results in all possible forms:

• in pointwise and stratified option;

• in graphical form;

• in tabular forms of stratified, interval processing.

The obtained results are the basis for calculation of reserves and three-dimensional geological modeling of the productive sites.

The massive 3D VSP is an innovative technology for borehole seismic surveys of the complex structures with a higher resolution (as compared to terrestrial 3D survey). The key purpose of 3D VSP is elaboration of detailed data cubes to be usable in clarifications of the fault positions, surveys of subsalt sediments, revealing the lateral changes of the reservoir properties, etc.

Processing of 3D VSP data is performed with application of 3D data migration from a large number of seismic source points (5-10 thousand).

Advantages

RosGeo applies an original 3D VSP data processing system, which includes:

• Full processing cycle from preliminary processing (QC, peaking waves, azimuthal record positioning, statics correction, suppression of noise waves, deconvolution, etc.) to elaboration of 3D migration cubes and its post-processing.
• Modern high-performance algorithms for 3D-migration with hashing and interpolation of velocities;
• Automatic picking of the waves across the entire PV array;
• Opportunity to clarify the velocity migration models (including VTI-models and velocity cubes);
• Opportunity to build up the migration cubes for longitudinal and converted waves.

To improve the effectiveness and reduce the risks in performance of hydraulic fracturing it is necessary to know the geometric parameters of the produced area of the drilling induced fractures (DIF).

The most effective tool of monitoring and 3D-imaging of the geometry hydraulic fracturing is the method of the Borehole passive microseismic monitoring (PMSM). It allows to identify the key geometric parameters of the hydraulic fracture with high accuracy, sufficient long-range action and reliability.

PMSM hydraulic fracturing technique includes the following types of activities:

• Operations following the programs of technogenic interference reduction and preparation of the observation wells;
• Identification of the velocity model for longitudinal and transverse waves;
• Azimuthal orientation of the well log probe;
• Calibration of the hardware and software set by shoots of the hydraulic fracturing punch;
• Continuous recording of the microseismic background and seismic-emission events: before, during and after the hydraulic fracturing;
• The data processing and interpretation using the specialized PSM processing system, which incorporates the algorithms of high-precision imaging seismic-emission tomography along with traditional methods of seismic emission source localization.

Our advantages

Specific features of the new PSM hydraulic fracturing technology:

• Capability to operate in difficult conditions during monitoring of the old or temporarily decommissioned wells;
• Capability to operate at the distances of approximately 1 km from the observation point to the place of the hydraulic fracturing;
• Accounting for stress-strain state in the vicinity of the fracture that allows to identify the geometry of major fractures more precisely.

These capabilities have been proven in the course of hydraulic fracturing operations in the conditions of West Siberia and Kazakhstan.

The high quality of the field 2D/3D seismic survey works is a key factor for successful implementation of the entire project. The experts of RosGeo will take care of supervision over all processes and quality improvement in implementation of all 2D/3D field works within a framework of a seismic survey project.

To provide the project successful implementation our experts will ensure:

• design development of the field seismic 2D/3D works;
• project design expert reviews;
• methodical and technological supervision over the work performance;
• performance of the field processing in order to control the methods and technologies of the field work performance;
• elaboration of methodological documentation on design development, methodological and technological supervision over the work performance;
• developer supervision over execution of the projects

The results to be submitted to the Customer include the libraries in all revisions, sections on paper and magnetic data carrier, SPS files on diskettes.

Set of surveys:

• Development and improvement of the Phanerozoic and Precambrian stratigraphic bases for geological surveys, geological prospecting and geological explorations in Siberia;

• Determination of oil and gas potential and scientific substantiation of the priority areas for geological explorations in Volga-Ural oil and gas province;

• Assessment of the deep oil and gas potential, study of oil and gas potential of the Riphean-Vendian sediments in the European part of Russia. The employees of KamNIIKIGS took part in development of the Program for support-parametric and ultradeep drilling in Russia up to 2020.

• Lithology and facial analysis, modeling of sedimentation genesis processes in paleobasins, palaeogeographical backstripping;

• Improvement of the stratigraphy theoretical bases, including the stratigraphic classification.

Our advantages:

• Availability of in-house laboratory base allows to conduct the fast sample preparations for microfaunal and palynological analysis in a variety of research purposes.

• Integrated approach, i.e. involvement of data for different groups of organisms ensures the accurate substantiation for compartmentalization of geological sections and correlation at local and regional levels.

• Unique technique for forecasting of the accumulation reservoirs genetically associated with non-structural hydrocarbon traps.

Our methodology includes:

• cross-section compartmentalization and correlation based on the data on studying of the drill samples, borehole logging and seismic survey data;

• CDPM data interpretation;

• elaboration of sedimentation models and paleofacial maps;

• identification of the areas of development of improved reservoirs genetically associated with nonstructural traps, extrapolation of sedimentation models with application of seismic data on undrilled sections;

• assessment of potential oil and gas resources on the basis of modeling of the processes of generation, migration and accumulation of hydrocarbons;

• identification of oil and gas accumulation areas, elaboration of prognostic maps.

Key achievements

Major objectives and research areas

In 2003, the scientists of VNIGRI completed the elaboration of the model for oil and gas generation and accumulation in natural reservoirs for application in forecasting and assessment of hydrocarbon resources. That allows to resolve a number of the moist important issues for the oil and gas sector:

• Development of the Russian option for quantitative modeling of the processes for generation, migration and accumulation of oil and gas that enables to forecast the petroleum potential with assessment of the localized oil and gas resources in the emerging fields.

• Development of the technique for quantitative modeling and mapping of the processes in ascending lateral migration of hydrocarbons and development of deposits in the course of geological periods, this techniques has no analogues in Russia and abroad

• Development of the world first characteristic description of the hydrocarbon fluids in the Earth’s crust and stratified hydrocarbon deposit systems over a wide range of depths, temperatures and pressures with application of the quantitative indicators.

• Development of the technique for quantitative assessment of oil and gas losses at successive stages of its migration and accumulation in the traps, which allows to quantify the resources in oil and gas deposits. The technique has been successfully tested in assessment of oil resources in the south of Tyumen region at the licensed areas and widely applied in the system of the Russian Ministry of Natural Resources for assessment and reassessment of petroleum resource potential both over the country in general, and in specific basins.

In 2006 the company conducted an analysis of the resource base of natural bitumen and heavy oils in Russia, developed the recommendations for its effective development.

Work results:

• Map of locations of the natural bitumens in Russia of 1:1000000 scale.

• Map of locations of the heavy oils in Russia of 1:1000000 scale.

• Analysis of the state of raw bitumens and heavy oils resource base in Russia, classification of the reserves and resources of natural bitumens on the basis of the quality determined pursuant to the physical properties, chemical composition, development conditions, availability of associated components and other characteristics.

• Review of the main national and foreign technologies of the heavy oils and natural bitumens mining and reprocessing.

• Recommendations on selection of the technologies that provide the cost-effective and environmentally friendly development of these types of raw materials taking into account the domestic and foreign experience.

• Recommendations regarding the selection of priority assets for deployment of geological explorations of the natural bitumens and heavy oils.

• Information arrays on heavy oils and natural bitumens in Russia.

Set of surveys:

• Stratigraphic studies of sections in wells based on the set of geophysical well logging materials, lithological and paleontological study of the drill samples.
• Tectonic zoning, paleotectonic analysis, study of the role of tectonic and sedimentary factors in development of modern structural plans.
• Geodynamic analysis of the peculiarities in manifestation of the salt tectogenesis. Identification of genetic links in the structure of sub-salt, of salty and post-salt sedimentary structures.
• Substantiation of the territories promising in terms of search for deposits of potassium and magnesium salts.