稀疏脉冲波阻抗反演参数对反演效果的影响研究

EFFECT OF PARAMETERS CONTROL ON SPARSE SPIKE IMPEDANCE INVERSION

稀疏脉冲波阻抗反演是目前最普遍应用的波阻抗反演方法之一。该方法在计算过程中涉及各种类型参数,这些参数选取的正确与否直接控制了反演成果的质量。本文从稀疏脉冲波阻抗反演的基本原理出发,通过模型的正反演探讨了反演子波的频率参数p、q、λ等主要的目标函数控制参数,以及计算过程中的反射系数迭代次数和波阻抗叠代次数等参数对反演的控制作用,系统分析了上述参数对反演效果的影响程度,并结合实际处理经验,指出了在实际地震资料处理过程中反演参数的正确设置方法。

Sparse spike impedance inversion is a recursive inversion based on the sparse spike deconvolution, and has become one of the most popular methods of acoustic impedance inversion in reservoir prediction. Wide band pass reflection coefficient can be obtained, and the stabilization of the acoustic impedance can be solved correctly through this method. It works well in complex structure, and its quality is controlled by the parameters selected in calculating because of the quality of the seismic data and log. According to the principle of sparse spike impedance inversion, the control effect of iteration time of reflection coefficient and impedance, the main control parameters in object function, such as frequency of wavelet, was studied, and the affection of these parameters to the result was analyzed systematically by modeling and inversion. The methods of parameters setting were pointed out through amounts of real seismic data.