Services

Services

IGSS operates in two business divisions:

  1. Field Seismic Works
  2. Geophysical Data Processing and Interpretation

Field Seismic Works

Seismic data acquisition uses the principles of seismology and reflected seismic waves to estimate the properties of the Earth’s subsurface. The method requires a controlled source of seismic waves. IGSS operates onshore and in transition zone sectors.

The main techniques used to generate these waves for onshore data acquisition are:

Explosive-and-drilling technique

Firstly, we configure a network of relatively shallow wells which host explosive charges. These charges are then detonated in a specific sequence. The impact of the sound waves reflecting off the interfaces between the layers of the subsurface are then registered. Due to its superior accuracy, this technique is used in the majority of data acquisition projects.

Vibration impact (vibroseis) technique

This technique utilizes industrial vibrator units which produce impact on the ground’s surface. We primarily use this method in areas where drilling is problematic and the planting of explosives is impracticable – regions such tundra, steppe and sandy deserts.

Impulse technique

This technique is based on our proprietary “Yenisei” technology. We employ it in areas where drilling is impracticable due to solid formations, such as dense rock, limiting the reach of waves produced by vibroseis. The impulse generated by our Yenisei units bypasses such formations.
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The seismic acquisition technologies used to analyze these waves are:

2D

Two-dimensional images of the underlying geological formations are created based on signals received from single lines of sources and geophones on the surface. This technique is primarily used for surveys of unexplored areas in order to identify potential hydrocarbon bearing structures. Cost-effective, these surveys are the least expensive to perform and can be used to cover large areas efficiently.

3D

This technique builds on the 2D method by laying sources and geophones over predertimined two-dimensional areas on the surface, creating a three-dimensional seismic image of the underlying formations. It is primarily used to develop a more detailed understanding of geological structures identified as being potentially hydrocarbon bearing – or to improve understanding of already producing reservoirs.

4D

4D involves placing 3D seismic surveys over the same producing fields, at intervals, over a predertimined time scale. This allows for monitoring of changes in the reservoir.

3D3C and 4C

The more complex surveys, 3D3C and 4C are typically used to gain a better understanding of recently discovered reservoirs. These technologies produce a more accurate image of subsurface structures. In certain conditions, they can also separately identify oil, gas and water within such structures. This significantly increases the accuracy of resource assessments and reservoir modeling.

Seismic Side Scan Surveys (SSSS)

A technique which utilizes scattered waves to identify low-amplitude tectonic faults.

Microseismic

Used to register seismic data during hydraulic fracturing, the Microseismic technique allows the user to monitor the operation in real time.

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Geophysical Data Processing and Interpretation

Once acquired, seismic data needs to be manipulated into a dataset. This can be used to infer the subsurface structure and produce visual outputs. After the data has been processed by geophysicists and engineers, it is subject to interpretation by experienced professionals. They use it to draw conclusions about the geology of the surveyed area.

The key competitive advantages in this market are local knowledge, access to data processing technologies and the expertise to interpret data.

IGSS offer a large range of 2D and 3D seismic data processing and interpretation services, including the rendering of complex geological oil and gas field models. This division also develops oil and gas field exploration strategies based on hydrodynamic models.

Our DP&I department uses the latest technology software systems, some of which are developed in-house. They also have access to certain Schlumberger group software, including Omega 2 and Petrel.

The principal services we offer are:

Processing of geological data

This is a technology-intensive process which utilizes both our hardware and software and sees us rendering oil and gas field models. It involves the manipulation and processing of very large quantities of data.
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Interpretation of geological data

This complex service draws upon the expertise of our professionals. They interpret the acquired and processed data to assist with reservoir modeling and analyses. Then, using their local knowledge and experience, they provide interpretations of geological structures and reserves.
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