AVO analysis is conducted using CRP trace gather generated from prestack time migration instead of CDP trace gather, so the shortcoming of CDP trace gather is overcome, AVO attributes are in proper offset, and the boundary of gas reservoir is more clear.

• 利用叠前时间偏移产生的CRP道集代替CDP道集作AVO分析,克服了CDP道集的不足,使AVO属性得到偏移归位,气藏边界更加清楚。