Method for carrying out speed analysis by using reflection horizon constraint

The present invention discloses a method for carrying out speed analysis by using reflection horizon constraint, belonging to the technical field of geophysical exploration seismic data processing. The method comprises the steps of (1) carrying out normal speed scanning on the CMP channel gather record on a survey line to obtain series stacked sections, (2) picking reflection horizons with continuous sync phase axes and strong energy on the series stacked sections for storage and backup, (3) projecting the picked reflection horizons to an energy speed spectrum and determining the speed of different positions. According to the method, the problem of inaccurate speed information caused by too little useful information in low signal to noise ratio seismic data is overcome, the speed pickup is more intuitive and clear, the operation is easy, the quality of speed model establishment and speed interpretation efficiency are improved, and the method is suitable for conventional speed analysis and is especially suitable for the speed analysis of low signal to noise ratio and complex structure area seismic data processing.