Abstract
In the current study, 2D seismic data in west An-Najaf (WN-36 line) were received after many steps of processing by Oil Exploration Company in 2018. Surface Consistent Amplitude Compensation (SCAC) was applied on the seismic data. The processing sequence in our study started by sorting data in a common mid-point (CMP) gather, in order to apply the velocity analysis using Interactive Velocity Analysis Application (INVA) with Omega system. Semblance of velocity was prepared to preform normal move-out (NMO) vs. Time. Accurate root mean square velocity (VRMS) was selected, which was controlled by flatness of the primary events. The resultant seismic velocity section for the study area shows that the velocity analysis became smother and provided an accurate seismic section.
Highlights
The seismic reflection method is one of the significant geophysical techniques in petroleum investigation
Random Noise Attenuation was applied on Surface Consistent Amplitude Compensation (SCAC) 2D seismic data after sorting them in common midpoint (CMP)
Interactive Velocity Analysis application in Omega system was performed on seismic data of West An-Najaf in the current study
Summary
The seismic reflection method is one of the significant geophysical techniques in petroleum investigation. The hydrocarbon investigation history was started in the beginning of the last century using seismic reflection and other geophysical methods [1] These seismic reflection explorations passed through many development stages from the middle of the last century up to the present time, including field surveys as well as data processing and interpretation with advanced software [2]. This method is the most widely used geophysical technique; it bears more direct and detailed photographs of the subsurface geological structures. We aimed at increasing the seismic data quality in the stack section by choosing a better result of velocity picking analysis
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