Abstract
In this paper, we took the time-distance curve equation and the Normal Moveout (NMO) principle as breakthrough point. According to the forward seismic simulation model and the cross-correlation principle in signal processing, we have convincingly studied the accuracy of NMO in simulation experiment. Firstly, the time-distance curve equation of single-layer reflection and the characteristics of cross-correlation are simply analysed. Then, we build the seismic forward model by Tesseral software, and accurate results are obtained after the simulation experiment is carried out. Finally, we get the conclusion by analysing and summarizing these results. The conclusion shows that the method effectively demonstrates the feasibility of the cross-correlation method in testing the accuracy of NMO, and provides a new idea for analysing the accuracy of velocity picking, even the accuracy of the underground model during petroleum exploration.
Highlights
Reflection seismic exploration [1,2] refers to the geophysical exploration method of inferring the nature and morphology of subsurface media by observing and analysing the response of solid or liquid media to artificially excited seismic waves, which is based on the difference in elasticity and density of the subsurface medium
How to control the accuracy of Normal Moveout (NMO) and ensure that the seismic simulation model conforms to the actual geological conditions has always been one of the hot spots and difficulties of reflection seismic exploration
The amount of NMO is simulated by establishing the forward model and the velocity spectrum analysis
Summary
Reflection seismic exploration [1,2] refers to the geophysical exploration method of inferring the nature and morphology of subsurface media by observing and analysing the response of solid or liquid media to artificially excited seismic waves (sound waves), which is based on the difference in elasticity and density of the subsurface medium. It is currently the main method for exploring mineral resources such as oil and natural gas in the world. The results of the cross-correlation operation reflect a measure of the similarity between the two signals
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