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Static Correction Determination Based on Delay Time Inversion
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Near Surface 2010 - 16th EAGE European Meeting of Environmental and Engineering Geophysics, Sep 2010, cp-164-00144
- ISBN: 978-90-73781-88-7
Abstract
To obtain a high resolution seismic image,static correction plays a vital role.Static correction is applied to mitigate the effect of irregular topography and weathering velocity.Inadequate static correction will result in seismic data smearing and false anomalies.We present a data driven technique that performs the delay time inversion based on the first arrivals for static correction computation. Based on this technique we do not require the explicit velocity information and the subsurface depth model.So it perform all the necessary steps for static correction computation in time domain thus prevents from certain errors that might propagate otherwise due to time to depth conversion.We applied the time-delay inversion method on the real field data and compared the results with other methods i.e. delay-time and generalized reciprocal method.Generalized reciprocal method requires the explicit velocity information and optimum distance.Change in any one of the parameter will change the apparent reflector velocity and depth model. While using delay time inversion we do not require velocity information and optimum parameter.Moreover delay time technique can be generalised to several weathering layers as compared to the generalised reciprocal method which is valid for only one layer.