摘要
In the deepwater exploration, it is difficult to get the accurate velocity. Based on the analysis of velocity structure characteristics and influencing factors, the authors select the best velocity-inversion method due to the research of forward modeling. Then, the authors buildup the depth conversion method suitable for the deepwater area of Baiyun Sag, by use of the mutual restraint of drilling speed,velocity of coherent inversion and seismic stacking speed. This method resolves tectonic distortion owing to rough subsea preferably, and improves depth-prediction accuracy consumedly.