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线性AVA反演将纵横波速度比作为常数,从而把非线性AVA反演问题线性化,以得到稳定的反演结果.为突破这一假设条件对AVA反演的限制,本文把纵横波速度比作为未知量,通过变换反演参数,将非线性AVA反演问题线性化,再利用广义线性反演方法求解,得到合理稳定的储层参数.利用实际工区井数据考察了方法的可行性和抗噪性.最后,将该方法应用到实际地震数据,得到了合理的反演结果,说明本反演方法的可靠性与适用性.
The linear AVA inversion uses the ratio of P to S wave as a constant to linearize the non-linear AVA inversion problem to obtain a stable inversion result.In order to overcome the limitation of this assumption on AVA inversion, the P-wave velocity ratio As an unknown quantity, by inverting the parameters of inversion, the nonlinear AVA inversion problem is linearized, and then the generalized linear inversion method is used to obtain the rational and stable reservoir parameters. The feasibility of the method and its resistance Noise.Finally, the method is applied to the actual seismic data, and a reasonable inversion result is obtained, which shows the reliability and applicability of the inversion method.