针对四川盆地东部高陡构造带A区的陡倾角成像问题，采用了叠前时间偏移技术加以解决。在叠前精细处理的基础上，试验选取了合适的偏移方法和偏移参数，建立高精度速度场，叠前时间偏移取得了较好的成像效果，能量归位好，成像精度高，目的层的信噪比和分辨率明显提高。

The technology of pre-stack time migration is selected to obtain accurate speed and migration imaging of steep dip structures with complicated surface conditions and severe variation of thickness and lateral velocity at Area A in the east part of Sichuan Basin. On the Basis of the pre-stack fine processing, the high precision of velocity field is set up and the offset parameter test is carried out. It is showed that this technology is characteristic of high precision migration imaging of pre-stack time, fine migration of the energy, and significant improvement in signal-to-noise and resolution ratio in target beds.