迭代阈值分割算法在电成像测井中的应用  

Application of iterative threshold segmentation algorithm in electrical imaging logging

作　　者：齐瑞燕 吴进波 石磊 QI Ruiyan;WU Jinbo;SHI Lei(College of Geophysics and Petroleum Resources,Yangtze University,Wuhan 430100,China;CNOOC China Limited,Zhanjiang Branch,Zhanjiang 524000,China;CNOOC Deep Sea Development Co.,Ltd.,Shenzhen 518000,China)

机构地区：[1]长江大学地球物理与石油资源学院,湖北武汉430100 [2]中海石油(中国)有限公司湛江分公司,广东湛江524000 [3]中海石油深海开发有限公司,广东深圳518000

出　　处：《电子设计工程》2021年第23期11-15,共5页Electronic Design Engineering

基　　金：国家科技重大专项(2016ZX05026003-007);生产性科研项目(CCL2020ZJFN0278)。

摘　　要：随着油气资源的勘探与开发,电成像测井方法成为这几年比较热门的非常规测井方法之一。对于如何从电成像测井资料中识别并提取裂缝、孔隙、骨架和连通相等不同成分,最重要的一个步骤就是图像分割。在基于直方图法的原理上,采用了人工指定阈值和迭代法计算阈值两种确定阈值的方法,并分别进行了Matlab编程,利用简单几何图进行程序测试,测试成功后对电成像测井图进行分割处理并对不同目标区域进行配色。通过两种方法的比较,得出迭代阈值分割算法可以有效地将电成像图中的孔隙、岩性及骨架等成分加以识别区分的结论。With the exploration and development of oil and gas resources,electrical imaging logging is one of the popular unconventional logging methods in recent years.Image segmentation is one of the most important steps in how to identify and extract the different components of fractures,pores,skeletons and connectivity from electrical imaging logging data.Based on the histogram method,this paper uses two methods to determine the threshold value,i.e.manually specified threshold and iterative method to calculate the threshold value.Matlab programming is carried out respectively,and the program measurement is carried out by using simple geometry map after the test is successful,the electrical imaging logging map is segmented and the color matching of different target areas is carried out.Through the comparison of the two methods,it is concluded that the iterative threshold segmentation algorithm can effectively identify the pore,lithology and skeleton in the electrical image.

关 键 词：阈值分割 电成像测井图 迭代法 直方图法 

分 类 号：TN911.73[电子电信—通信与信息系统]