利用神经网络拾取叠加速度  

Stack velocity pickup using neural network

作　　者：查朝阳[1] 

机构地区：[1]河南石油勘探局地质调查处物探研究所,473132

出　　处：《石油地球物理勘探》1996年第6期892-897,共6页Oil Geophysical Prospecting

摘　　要：鉴于三维地震和高密度二维地震的数据量很大，仍然采用人工方法拾取速度谱，不仅效率低，而且精度低。为此，人们提出许多新的方法。本文采用人工神经网络与模糊数学相结合的方法。首先对输入数据用模糊教学方法作边界搜索和模糊聚类预处理，然后通过人工神经网络误差反向传递算法（BP算法），学习结定的样本值，训练网络模型，输入经过预处理的待识别数据，完成识别工作，自动提取叠加速度。该方法肯有抗噪能力强、拾取速度精度高的特点，而且能够实现自动解释速度谱。Manual vclocity spcctrum pickup results in low cfficiency and poor accuracy because both 3D seismic survey and high-density 2D seismic survey have very great data volume. So, people advance continuously many new mcthods to solve the problem. I put forward a new method which involves neural network and fuzzy mathematics. The method works in the following steps:Make boundary search and clustering processing of the lnput data with the aid of fuzzv mathematics.Learn thc given samples to train nctwork model by using BP algorithm for neural network error.Input the preproccssed data for recognition.Automatlcally pick up stack velocity after the data recognition.The rnethod has good noise-resistance and offers accurate velocity, so that ve-locity spectrum can be lnterpreted automatlcally.

关 键 词：神经网络 模糊数学 叠加速度 地震勘探 地震数据 

分 类 号：P631.49[天文地球—地质矿产勘探] P631.443[天文地球—地质学]