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本文分析了静校正中不同浮动基准面的特点及确定方法。通过理论模型试验对平滑地表、平均静校正量与最小静校正误差等浮动基准面的静校正效果进行比较,验证了在最小静校正误差基准面上得到的叠加速度仅取决于低速带底界下伏地层的速度,而与地形起伏、低速带结构无关,得到的叠加剖面具有较好的同相叠加效果。另外为了更加符合实际资料处理情况,本文中采用波动方程模拟数据进行理论模型试验,并由此给出了一种新的基于波形的目标函数计算方法。同时修改了最小静校正误差计算公式,使其适用于起伏底界非均匀速度模型的实际资料静校正处理。最后部分对实际资料的处理进一步证明了该方法的优越性。
This paper analyzes the characteristics and the determination of different floating datum in static correction. Through the theoretical model test, the static correction effect of the floating reference surface such as smooth surface, average static correction and minimum static correction error are compared. It is verified that the superposition velocity obtained from the minimum static correction error datum plane depends only on the low velocity bottom boundary The velocity of the volcanic strata, however, has nothing to do with the topographic relief and low-velocity belt structure. The superimposed profile obtained by this method has a better in-phase stacking effect. In addition, in order to be more in line with the actual data processing, this paper uses wave equation simulation data to conduct theoretical model tests, and thus presents a new method of calculating the objective function based on the waveform. At the same time, the formula of the minimum static correction error is modified, which makes it suitable for the actual data statics correction of non-uniform velocity model with undulating bottom. The final part of the actual data processing further proved the superiority of the method.