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4D Comparative Analysis of Seismic Reflection Data

by | Jul 6, 2021 | Blog, CoViz 4D

Seismic reflection data have been utilized in the oil and gas industry and other geological studies to identify subsurface characteristics, calling attention to prevalent uncertainty and variations. The data is dependent upon the presence of acoustical contrasts within the subsurface which can be identified during the seismic reflection surveys. It is ideal in developing imagery that is representative of various subsurface attributes. The ability to analyze these attributes and their correlations in a 4D seismic volume helps in making multiple geological interpretations for enhanced well and reservoir planning.

With advanced visualization and analytics tools, geoscientists and engineers can easily integrate multiple data to develop a conceptual model which can be used to enhance the understanding of subsurface geology for determining an economic strategy for asset development.

Analyzing Seismic Reflection Data

The complex lithological and stratigraphical properties of the subsurface present a greater uncertainty in developing a complete understanding of the reservoir. With seismic reflection data, it is possible for interpreters to map a detailed 3D seismic reflection model. The data is acquired based on the acoustical contrasts that provide an indication of variation in mass density or seismic velocity. This variation can be easily interpreted to identify the different subsurface attributes including lithological formations, faults, horizons, and hydrocarbon targets at their correct geospatial location.
However, in the development of a 3D geological model, it is important to take into account the dynamic nature of the reservoir. With the understanding of subsurface geometry and time-lapse monitoring, it is possible to detect any attribute changes, keeping the changes in the reservoir in check over time.
In the enhanced analysis of subsurface attributes, the 3D seismic reflection data can be used for subsurface characterization through effective time-depth analysis and velocity modeling. This can be ideal in recognizing the depth structure of the reservoir. The need to create a simulation model as close as possible to the geological cross-section can be further assisted with visualization and analysis tools. These tools can be leveraged to ensure an effective comparative analysis between the 3D geological model and the reflection model.

Visual Analysis of 4D Seismic Volume

By using tools such as CoViz 4D to conduct a comparative visual analysis, users can bring in all 3D seismic volumes such as coherency cube, reflection model, and amplitude model. The models can be viewed as 2D slices to identify the in-depth analysis of the subsurface and its seismic attributes. The 4D visualization ability also facilitates asset teams to:
  • Identify the subsurface geometry
  • Trace the horizon along the study field
  • Identify the fault and fractures and reduce uncertainty in drilling
  • Analyze depth-conversion error
  • Identify potential unswept areas
A comparative analysis makes it suitable for interpreters to quality check the data to ensure accuracy and precision in data interpretation for asset planning.

Leveraging CoViz 4D for Enhanced Seismic Analysis

CoViz 4D makes it easy for seismic processing through the handling of diverse subsurface data and models. Its advanced ability makes it easy to develop and interpret the 3D seismic model and compare it with existing models or interpretations to get an accurate seismic profile. The knowledge of various geological boundaries makes it convenient for reservoir and drilling engineers to make an informed asset development decision.
Most of the time, the project also suffers due to the lack of subsurface information or the inability to compare with supporting and verifiable data. CoViz 4D provides the ability to integrate data earlier in the process, making it convenient for asset teams to perform comparative analysis from the new and existing data. The ability to ensure data accuracy allows projects to reduce risk and save valuable time and economic investment during the planning and asset development phase.

CoViz 4D, a data visualization analytics software from Dynamic Graphics, Inc., gives oil and gas professionals the ability to easily access and analyze relevant data associated with HPHT reservoirs. Powerful visualization capabilities enable reservoir teams to explore data relationships, calculate gradients, and more accurately analyze how subsurface conditions influence drilling and completion methods. To learn more about CoViz 4D contact our team.

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