地震波阻抗反演的ANNLOG技术及其应用效果

通过地震子波的多级分解和多级非线性变换，得到一种非线性地震褶积模型。将该模型与Ｆ－Ｐ模型人工神经理论相结合可形成一套利用测井和地层约束的高分辨率地地震波阻抗反演技术。其突出的特点是：多级非线性变换能使迭代反演快速收敛，并具有极高的纵向反演分辨率；用于存储多级地震子波的人工神经网络，可根据地震数据动力学特征在横赂上的变化进行了可靠的自适应外推反演，并在横向上保持纵向保持纵向分辩率的连续性。

ANNL0G technique for seismic wave impedance inversion and its application effect

A nonlinear seisimc convolution model is constructed by performing the multi-stage decomposition and multistage nonlinear transform of seismic wavelets. Com-bining this model with the neural network that is based on neuron F-P functionmodel forms a ANNLOG technique for high-resolution wave impedance inversionunder the c0nstraints of logging and stratigraphic data. This technique involves fol-lowing essential points:. Multistage nonlinear transform causes fast iterative convergence and veryhigh resolution in vertical direction.. According to the lateral dynamic characteristic variation of seismic data,theneural networks storing multistage seismic wavelets (F-P model) enable reliableadaptive extrapo1ation inversion, and make continuous vertical resolution be stablein azimuthal direction.. Stratigraphic restrained inversion makes ANNLOG technique suitable to complexgeologic structures such as big throw faults,pinchouts and so on.