共聚焦点（CFP）成像技术述评

CFP成像有共聚焦和双聚焦两种形式。前者用于寻找构造信息，后者则主要用于分析与储层描述有关的信息。借助于两个连续且相互独立的聚焦步骤，CFP成像技术将叠前偏移与速度分析分离开来，用算子更新代替传统的对速度场直接更新，最后由经正确更新的聚焦算子反演出地下速度场。该技术在精确成像的同时，很好地避免了速度难题。这一优良特性可被广泛应用于地震数据反演和处理的各个方面（处理复杂近地表难题、多次波消除、多分量偏移、地下盐丘成像及时延地震监测等）。因此，CFP成像技术是一种理论上先进、应用前景广阔的新的成像技术，对复杂地质问题的解决更是有着独到的功效，在我国可望有广阔的发展空间。

Review of common focus point (CFP) imaging technology.

CFP(Common Focus Point)imaging technology contains confocal and bifocal version.The former is used to seek structural information while the later is used to seek reservoir related information.By the aid of two consecutive and independent each other focus steps,the CFP technology separates the pre stack migration from the velocity analysis progress using renewing of operator to replace traditionally direct renewing of velocity field and inversion of subsurface velocity field can be finally finished by correctly renewed focus operator.The technology maximally avoids the velocity problem while precision imaging can be got.This advantage can be widely used in every aspect of seismic inversion and data processing (such as handling complicated near surface problem, removing multiple,multi component imaging subsalt imaging and time lapse seismic monitoring,etc).Therefore, the CFP imaging technology is a new imaging technology which has advanced theory and wide applied prospect,having a special effect on solving complex geologic problems and gaining wide development space in our country.