Most of the results from the processing of PSDM gives a good image, but does not tie with well. This is because the method has been applied to PSDM which still uses assumption that seismic wave propagation medium is the medium that is isotropy. In fact the effect of anisotropy is found in the subsurface media. To answer these problems then developed a method in which PSDM parameters include the elastic anisotropy of the medium into the seismic data processing algorithms, or more often referred to as anisotropic PSDM. Anisotropic PSDM processing stages beginning with the determination of anisotropy parameters delta calculated from well markers and seismic marker. Isotropic interval velocity results PSDM converted to interval velocity anisotropy with anisotropy parameter transformation using the delta anisotropy parameter. In the early stages of anisotropy parameters epsilon value is made equal to the delta as a medium approach is elliptical anisotropy. Then do the PSDM anisotropy, the next stage, namely refining the anisotropy parameters epsilon. Anisotropic PSDM provides more image results tie in well compared with the results of PSDM isotropy. So anisotropic PSDM method is a solution to get best imaging of subsurface that illustrates the real and minimize the occurrence of errors in seismic data interpretation stage.
Author : Slamet Pujiono