Common focus point migration (CFP), which is a bifocal migration method that focuses both in emission and detector, is a new seismic imaging method that is based on the principle of equal traveltime.

• 共聚焦点 (CFP)偏移 (激发聚焦和检波聚焦的双聚焦偏移 )是一基于等时原理的地震成像方法。