Chapter 3: Simultaneous matching and adaptive subtraction of primaries and multiples

In this chapter I address the issue of subtracting an estimated multiple model from data containing primaries and multiples. This is a key step in multiple attenuation methods such as SRME in which the multiple model is expected to have wavelet differences with respect to the data. Instead of just matching and adaptively subtracting the multiple model, I simultaneously match the estimates of both the primaries and the multiples to the data. This has the key advantage of reducing the crosstalk from the multiples in the final estimate of the primaries. I illustrate the method with both synthetic and real 2D data in CMP and angle gathers. Furthermore, I show that the method can be used beyond the attenuation of multiples by applying it to the matching and adaptive subtraction of ground-roll. The adaptive subtraction presented in this chapter is used to compute the results of Chapter .