莺歌海盆地AVO技术应用效果分析

RESULT ANALYSIS OF AVO APPLICATION IN YINGGEHAI BASIN

从AVO正演计算入手，分析了已被钻井证实的含气砂岩的AVO异常特性，提出了莺歌海盆地浅部气层所具有的AVO负异常的特殊规律，探讨了AVO技术在莺歌海盆地找气的应用前景。认为在莺歌海盆地寻找大气田，要注意AVO正异常，更应当注意AVO负异常，而且也不应忽略振幅随炮检距无变化的强反射。

Starting with AVO forward calculation, this paper gives analysis to the AVO abnormal characteristic of gas sand verified by drilling and proposes the AVO negative abnormal characteristic of shallow gas reservoirs in Yinggehai Basin. It goes further into the AVO application prospects for gas prospecting in Yinggehai Basin and suggests that while attentions are pail to AVO positive abrormals, more attentions should be given to AVO negative abnormals as well.