论文部分内容阅读
为了定量地反映复杂非均匀介质非均匀地质体的尺度大小,本文利用统计学方法建立了能够很好地描述复杂非均匀介质特征的随机介质模型,模型参量自相关长度描述了非均匀介质横向和纵向上非均匀体的平均尺度。基于所建立的随机介质模型通过速度的横向变化和速度标准差分别探讨了自相关长度与非均匀体尺度之间的关系。对速度横向变化的研究表明:随机介质内速度具有一定均值和方差并呈随机扰动特征;随着模型自相关长度的增大,非均匀体尺度也随之增大。通过速度标准差的研究得出自相关长度与非均匀体尺度之间关系的拟合公式,利用此公式可以定量地获取非均匀体尺度的实际大小。
In order to quantitatively reflect the size of nonuniform geological bodies in complex heterogeneous media, a stochastic medium model that can well characterize complex inhomogeneous media is established by using statistical methods. The autocorrelation lengths of the model parameters describe the heterogeneity of heterogeneous media. The average dimension of the inhomogeneous body in the longitudinal direction. Based on the established stochastic medium model, the relationship between autocorrelation length and heterogeneous body dimension is discussed respectively by the horizontal change of velocity and standard deviation of velocity. The research on the lateral variation of velocity shows that the velocity in the random medium has some mean and variance and is characterized by stochastic perturbation. As the autocorrelation length of the model increases, the heterogeneous body scale also increases. Through the study of standard deviation of velocity, the fitting formula of the relationship between the length of self-correlation and the dimension of heterogeneous body is obtained. With this formula, the actual size of heterogeneous body can be quantitatively obtained.