AVO技术在济阳坳陷浅层气勘探中的应用

The application of AVO technique for shallow gas survey in Jiyang Depression

胜利石油管理局物探公司研究所, 东营257100

The Researeh Institute of Physical Survey Company, Shengli Petroleum Administrative Bureau, Dongying257100

AVO技术是继亮点技术之后的又一项利用地震振幅信息勘探天然气的有效地球物理方法。本文通过对AVO技术的岩石物理基础研究,揭示了本区浅层砂泥岩速度的变化规律,证实了浅层气藏具有典型的气藏AVO特征──即振幅随偏移距增大而增强。实际资料处理解释结果表明,AVO技术在济阳坳陷具有广阔的应用前景。

AVO technique is another effective geophysical method after bright spot technique whichutilizes amplitude imformation of seismic record for gas prospecting. In this paper through thefundamental studies of AVO technique in petrophysics the velocity regularity of the shallowsandstone and mud shale is revealed,and it is verified that shallow gas reservoirs possess typicalgas reservoir AVO features,that is,the bigger the offset is,the stronger the amplitude becomes.The practical interpretation results show that AVO technique promises encouraging prospects inthis area.