莺歌海盆地中深层速度特征研究

Velocity Characteristics of Middle-deep Strata in Yinggehai Basin

莺歌海盆地中深层为高温、异常高压地层,具有独特的地震速度特征,在中深层(约2250m)速度存在倒转现泉。通过对速度倒转现象的分析,认为主要是受异常压力和高温因素控制,为此讨论了速度特征对勘探实践的影响及其相应的解决方案,为该区下部勘探指明了方向。

Middle-deep strata in Yinggehai Basin are high temperature and abnormal high pressure formation with special seismic velocity characteristics, of which velocity inversion exists in middle-deep strataCabout 2250m). through analysis of velocity inversion, it is considered that it is controlled mainly by the factors of abnormal high pressure and temperature. Thus the effect of velocity characteristics on exploration and relevant solution are discussed, by which direction for future exploration in the area is given.