Modeling and design of field Observation Systems

These works are usually carried out at the planning stage of geological tasks and financial investments in the study of an object. The cost factor plays an important role in calculating the optimal dimensions of 3D surveys, as well as in the selection of observation methods. The economic costs of 3D surveys significantly depend on the territory on which the survey is supposed to be performed, the amount of necessary equipment and personnel, and, of course, the complexity of the geological tasks. If the known budget figures are too low, then 3D surveys cannot be planned very well, and thus the solution of the geological problem will be in question. In order to estimate the costs of conducting 3D seismic surveys and to be sure of the successful solution of geological problems, it is necessary to have data on the sizes of the optimal 3D survey and the optimal observation technique. The proposed 3D modeling and design work is aimed at providing this data.

For oil companies, the implementation of the proposed work will allow:

1. Within the licensed areas, outline research areas, including priority ones.
2. Determine the optimal dimensions of 3D areas.
3. Recommend indicative dates and season of research.
4. To recommend a field observation technique in a multivariate consideration.
5. Approximately estimate the estimated cost of planned seismic surveys.

Basic procedures:

1. Creating a three-dimensional multi-layer model of subsurface space
2. Migration Aperture Modeling
3. Shooting Size and Orientation
4. Selection of a network of profiles and observation methods
5. Bean Attribute Analysis
6. Modeling the rays of reflected waves, analysis of attributes in "underground" bins
7. 3D shooting development support

1.2 Creation of a three-dimensional multilayer model of subsurface space, modeling of reflected rays and migration aperture

3.Determining the size and orientation of shooting

The size of the survey was determined taking into account the migration aperture, the network of profiles is oriented to quarterly cuts and routes of 2D profiles of previous years, along the gas pipeline.

4. The choice of the optimal mining technique:

• network density profiles, bin size;
• placement size for sufficient coverage of target objects;
• the multiplicity of the designed 3D work, taking into account the assigned geological problems.

5. Bean attribute analysis

6. Additional research.

Additional studies are possible to justify the optimal size of the survey and the chosen observation methodology:

• ray tracing of reflected waves using a structural model of the subsurface space and the designed survey;
• analysis of attributes in "underground" bins;
• creation of synthetic seismograms and time sections, wave field analysis.

7. Maintenance of field development of 3D shooting

The work is carried out by a 3D modeling and support group of seismic surveys using a modern software package - MesaExpert by I / O Green Mountain. Highly qualified 3D design specialists analyze the geological and geophysical knowledge and the situation on the ground, followed by creating a three-dimensional model of subsurface space and calculating the optimal 3D survey.

3D designers have mastered the technique of designing orthogonal, “oblique”, “brick” and other types of surveys, both on land and in transit zones. There is experience in designing multicomponent seismic exploration.

3D surveys are supported, i.e., control over the correctness of development and compilation of programs to compensate for spacing and omissions of physical observations.

Specialists of the group have extensive experience in 3D design (up to 10 years), publications in geophysical journals, participate in conferences with reports on design and modeling

At the end of the pre-design work, the Customer has the opportunity to receive a report on a specific area in the form of a text (including geological and technical specifications for research) with illustrations and graphical applications (design schemes) on paper. In addition, all materials on the report, as well as SPS files, are transmitted to the Customer electronically.

Pre-design work on modeling and calculation of optimal 3D surveys has been carried out in Permneftegeofizik since 2005 and up to now in areas and oil and gas fields located in the Perm Territory, Udmurt Republic, Komi Republic, Samara and Sverdlovsk Regions.

These works are usually carried out at the planning stage of geological tasks and financial investments in the study of an object. The cost factor plays an important role in calculating the optimal dimensions of 3D surveys, as well as in the selection of observation methods. The economic costs of 3D surveys significantly depend on the territory on which the survey is supposed to be performed, the amount of necessary equipment and personnel, and, of course, the complexity of the geological tasks. If the known budget figures are too low, then 3D surveys cannot be planned very well, and thus the solution of the geological problem will be in question. In order to estimate the costs of conducting 3D seismic surveys and to be sure of the successful solution of geological problems, it is necessary to have data on the sizes of the optimal 3D survey and the optimal observation technique. The proposed 3D modeling and design work is aimed at providing this data.

For oil companies, the implementation of the proposed work will allow:

1. Within the licensed areas, outline research areas, including priority ones.
2. Determine the optimal dimensions of 3D areas.
3. Recommend indicative dates and season of research.
4. To recommend a field observation technique in a multivariate consideration.
5. Approximately estimate the estimated cost of planned seismic surveys.

Basic procedures:

1. Creating a three-dimensional multi-layer model of subsurface space
2. Migration Aperture Modeling
3. Shooting Size and Orientation
4. Selection of a network of profiles and observation methods
5. Bean Attribute Analysis
6. Modeling the rays of reflected waves, analysis of attributes in "underground" bins
7. 3D shooting development support

1.2 Creation of a three-dimensional multilayer model of subsurface space, modeling of reflected rays and migration aperture.

3.Determining the size and orientation of shooting

The size of the survey was determined taking into account the migration aperture, the network of profiles is focused on quarterly cuts and routes of 2D profiles of previous years, along the gas pipeline.

4. The choice of the optimal mining technique:

5. Bean attribute analysis

6. Additional research

Additional studies are possible in order to justify the optimal size of the survey and the chosen observation technique:

• ray tracing of reflected waves using a structural model of the subsurface space and the designed survey;
• analysis of attributes in "underground" bins;
• creation of synthetic seismograms and time sections, wave field analysis.

7. Support of field testing 3D

The work is carried out by a 3D modeling and support group of seismic surveys using a modern software package - MesaExpert by I / O Green Mountain. Highly qualified 3D design specialists analyze the geological and geophysical knowledge and the situation on the ground, followed by creating a three-dimensional model of subsurface space and calculating the optimal 3D survey.

3D designers have mastered the technique of designing orthogonal, “oblique”, “brick” and other types of surveys, both on land and in transit zones. There is experience in designing multi-component seismic exploration.

3D surveys are supported, i.e., control over the correctness of development and compilation of programs to compensate for spacing and omissions of physical observations.

Specialists of the group have extensive experience in 3D design (up to 10 years), publications in geophysical journals, participate in conferences with reports on design and modeling

At the end of the pre-design work, the Customer has the opportunity to receive a report on a specific area in the form of a text (including geological and technical specifications for research) with illustrations and graphic applications (design schemes) on paper. In addition, all materials on the report, as well as SPS files, are transmitted to the Customer electronically.

Pre-design work on modeling and calculation of optimal 3D surveys has been carried out by Permneftegeofizika OJSC since 2005 and up to now on oil and gas fields and deposits located in the Perm Territory, the Udmurt Republic, the Komi Republic, Samara and Sverdlovsk Regions.

• network density profiles, bin size;
• placement size for sufficient coverage of target objects;
• the multiplicity of the designed 3D work, taking into account the assigned geological problems.