C-Wave Focusing and Short Spread Kinematics Controlled through the CCP-Scan Technique

N-02 C-WAVE FOCUSING AND SHORT SPREAD KINEMATICS CONTROLLED THROUGH THE CCP-SCAN TECHNIQUE Introduction 1 Converted wave velocity analysis is well understood in the case of flat reflectors in horizontally stratified media. In this case the kinematics of the CMP (Common Mid-Point) gathers is identical to the kinematics of the CCP- (Common Conversion Point) gathers so that the problems of NMO velocity analysis and CCP-binning can be decoupled. In this case the move-out on the CMP is symmetrical and hyperbolic at short spread and Velocity Analysis follows the classic NMO formula. Nevertheless the converted wave CMP-gathers never correspond to true CCP