Study On Mapping Method Of Prestack Depth Migration Data In The Flame Mountain Structure Of The Tuha Basin

The problem of the seismic exploration in Tuha basin is about imaging in complex near-surface and underground geologic structural conditions, VolcanoLand hills tectonic zone of Tuha basin is located in the middle of Tuha basin, it belong to complex aloft-steep structure.VolcanoLand hills tectonic zone of Tuha basin is the low signal-to-noise ratio area, structural feature is hardly to control. The surface and underground conditions of the areas is very complex, the existence of thin out and overthrust fault is very common, the big saltation of velocities in the areas, the drilling data and the seismic data are not match, the conventional time migration is very hardly to imaging.At present, prestack depth migration technique is the best technique to imaging of complex aloft-steep structure. Application of prestack depth migration in complex areas can solve imaging problem in the areas of overthrust fault?salt dome?thin out and the big saltation of velocities, the key of seismic data processing mainly lies in static corrections and imaging, and both of them are relative to velocity model, on the basic of fine structure interpretation, compared with the three kinds of methods to structure mapping, choose the best one, and finally we can get satisfied application result.