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在近地表速度结构变化较快的地区,能否做好静校正直接决定了地震勘探效果。而在复杂地区三维资料处理中,很难用一种方法彻底解决整个区块的静校正问题。为此,以非线性层析反演静校正方法为基础,在平面上对速度模型进行相带划分,以及用小折射和微测井资料作为初始模型,进行约束层析反演,可大大提高模型的垂向反演精度和空间合理性。对不同静校正方法具有成像优势的高频静校正量,采用拼接方法,在边界用函数插值方法进行处理,可实现多种方法在一个三维区块成像优势的结合。以上复杂地区三维静校正综合技术,在实际三维资料处理中见到了很好的应用效果。
In areas where the velocity structure near the surface changes rapidly, whether static correction can be done directly determines the seismic exploration effect. In complex 3D data processing, it is difficult to completely solve the problem of static correction of the entire block by a method. Therefore, based on the non-linear tomographic inversion static correction method, the velocity model is divided into facies and zeros by using the data of small refraction and micro-logging as the initial model and constrained tomographic inversion can be greatly improved Vertical inversion accuracy and spatial rationality of the model. The high-frequency static correction with imaging advantages for different static correction methods is processed by the splicing method at the boundary using the function interpolation method, which can combine the advantages of various methods in imaging in a three-dimensional block. Above complex areas of three-dimensional static correction of integrated technology, the actual three-dimensional data processing to see a very good application effect.