基于曲率属性的构造应力预测方法

Tectonic stress prediction method based on curvature attribute

利用曲率属性估算构造应力的传统方法是通过x、y方向的曲率和xOy面的扭率计算相应的应力分量,进而求取构造应力。但是,这些方法没有构建曲率属性与构造应力的直接关系,且目前商业软件通常不能直接提取x、y方向的曲率和xOy面的扭率,只能直接提取最大正曲率、最小负曲率等属性。因此,在薄板弯曲理论的假设条件下,推导最大正曲率、最小负曲率与构造应力之间的关系,建立基于最大正曲率、最小负曲率属性的构造应力估算方法。该方法实用、简单易行。实际资料的应用表明,该方法与传统方法的构造应力预测效果一致。

Traditional methods for estimating tectonic stress using curvature attribute calculate stress components through the curvatures in x and y directions and the torsion on xOy plane to obtain tectonic stress.However,no direct relationship can be established between curvatures and tectonic stress,and available commercial software usually cannot directly extract the curvatures in xand ydirections and the torsion on xOy plane,but can only directly extract attributes such as maximum positive curvature and minimum negative curvature and so on.On the assumptions of the thin plate bending theory,the relationship among maximum positive curvature,minimum negative curvature and tectonic stress has been established,which is used to estimate tectonic stress based on maximum positive curvature and minimum negative curvature.This method is practical and simple to use.Applications have proved that the method can provide consistent results with traditional methods in predicting tectonic stress.