PSS-Geo has wide experience in land seismic processing from most parts of the world. We do both 2D and 3D processing.
•Timan Pechora –permafrost
•Tunisia –mountanious with heavy faulting and varying unconsolidated overburden
•Algeria –varying sandy overburden
•Nigeria –thick weathering layer
•Yemen –across wadis
•Iraq –flat desert
•Zagros foothills –gently rolling
•Zagros mountains –high relief
See map here
We are not limited to particular solutions; we cooperate with different developers and develop algorithms. We will apply to your data the methods that suit it bests.
The best solution to process seismic land data depends on several factors, including the specific objectives of the seismic survey, the complexity of the subsurface geology, the available resources, and the desired level of detail and accuracy in the final results.
However, some general steps that are commonly used in processing seismic land data include:
Data QC and preprocessing: This involves assessing the quality of the acquired data, removing noise and interference, and correcting any instrument or acquisition-related errors.
Velocity analysis: This involves estimating the velocity of the subsurface layers to accurately convert the recorded seismic wave travel times into depths. Velocity analysis may be done using various methods, including tomography, wave-equation-based inversion, or stacking velocities.
"Land data statics": refers to the process of correcting for time delays that occur due to variations in the elevation of the surface of the earth. These time delays can cause errors in seismic data processing, as they can cause seismic reflections to be misinterpreted as coming from the wrong depths in the subsurface.Land data statics correction involves measuring the elevation of the earth's surface at various points along the seismic survey line and calculating the corresponding time delays for the seismic signals. These time delays are then used to adjust the seismic data to account for the variations in elevation.The process of land data statics correction is typically performed early in the seismic data processing workflow, before other types of processing such as filtering, deconvolution, and migration are applied. Accurate statics correction is critical for producing high-quality seismic images and interpreting subsurface geology accurately.
Deconvolution and filtering: This step involves removing the source wavelet signature from the recorded data and applying appropriate frequency filters to isolate the desired seismic signal.
Migration: This step involves reconstructing the subsurface structure by processing the preprocessed seismic data to create images of the subsurface layers. There are several migration techniques available, including Kirchhoff migration, reverse-time migration (RTM), and wave-equation migration.
Interpretation: This involves analyzing the processed seismic images to identify and interpret subsurface features such as faults, stratigraphic layers, and reservoirs. Interpretation may involve manual interpretation by geoscientists or automated interpretation using machine learning algorithms.
It is essential to note that the processing steps may vary depending on the specific objectives of the seismic survey and the characteristics of the acquired data. Additionally, the use of advanced processing techniques such as Full-Waveform Inversion (FWI) or Least-Squares Migration (LSM) may provide more accurate and detailed subsurface imaging, but may also require more computational resources and expertise.