成像测井中的裂缝计算机自动识别方法

Automatic Identifying Algorithm of Fractures in Imaging Logging by Computer

近两年来 ,成像测井逐步成为人们所关注的热点课题 ,根据测井中的井壁成像识别裂缝是其中的关键问题之一。为此 ,根据地层中裂缝在钻井局部位置上表现为平面的特点 ,提出了一种成像测井中的裂缝识别方法。它首先寻找出一条穿越井壁展开图象中可能裂缝点数最多的一条直线 ,再剔除离此直线距离较远的噪音点 ,然后调整这一直线的位置 ,并重复以上过程。该方法弥补了传统做法的缺陷 ,并用于某一由地震波产生的成像测井资料的图象解释 ,得到了满意的结果。

In recent years, imaging logging has become a research subject attracting wide attention. One of the key problem is how to identify the fractures in the imaging material of the wells. According that local fractures take the shape of plane, a fracture identifying algorithm was proposed. First, a line fitting most of the image pixels is determined. Second, the noise pixels far away from the line are deleted. Then the position of the line is calculated again. Repeat above process until the position of the line doesn't change. This algorithm makes up the defection of traditional operation and has been used in a real problem, the results showed a good performance.