可用于复杂地质体的波动方程基准面技术

提出改进的波动方程基准面方法,用于解决地表一致性问题,通过基准面的下移,可以使深部的信号增强,变多值走时为单值走时,从根本上消除了上覆层速度横向不均匀的影响,从而可以更好地解决复杂地质体成像问题。作者从原理上对上述观点给予了证明,而且给出利用波动方程基准面有限差分法做的实例－－大庆油田“陆相断隐模型”。

The Usability of the Wave-Equation Datuming for Complicated Geological Body

Many geophysists have obtained valuable achievements in the field where wave-equation datuming, as a static shifting technology, which is used for irregular topography datum correcting. The author point out firstly, through the downward continuation of the datum, the deep signal may be enhanced, and the deleterious effect, such as the large velocity contrast in the upper layers, can be removed thoroughly, and then the deep layer with complicated structure can be imaged more clearly. Not only demondstrated by maths principles, but also the above conclusion is demonstrated by the examples, which is based on the model "Land Facies Faulted Basin Model".