融合裂缝形态信息的电阻率测井成像图空白条带填充方法
A filling method of blank strip for electrical logging images based on morphological information of fractures
夏文鹤 1韩玉娇 2郭全兴 1官文婷 3杨燚恺 1陈向东4
作者信息
- 1. 西南石油大学电气信息学院,四川成都 610500
- 2. 中国石化石油工程技术研究院,北京 102200
- 3. 中国石油西南油气田公司工程技术研究院,四川成都 610050
- 4. 西南交通大学信息科学与技术学院,四川成都 610031
- 折叠
摘要
电阻率测井成像图中存在宽度和位置不定的空白条带,而目前常用的空白条带反距离加权插值填充法仅依靠像素点距离参数计算插值,往往导致填充后区域与实测区域纹理不连贯,纹理易呈现直线状,与实际状况不符.为此,将裂缝区域形态与分布信息作为参量,构建插值计算模型,形成融合裂缝形态分布信息的空白条带填充法.该填充算法能根据插值点与裂缝形态拟合线的相对位置关系,动态调整参考点对插值点插值的权重系数,填充后的裂缝区域纹理连贯平滑,更符合裂缝实际形态和分布的规律.实际测井数据应用表明,相较于传统填充方法,采用该方法填充后的裂缝分布拟合线与霍夫变换后曲线相似度提升25％以上,不连贯填充点数量下降88％以上,性能提升明显.该方法的应用成果可为后续测井图像中各种裂缝的智能识别和精确分割提供更好的数据支撑.
Abstract
There are blank strips with varying widths and positions in resistivity logging images.However,the commonly used inverse distance-weighted interpolation filling method for blank strips only relies on the distance parameters of pixel points to calculate interpolation,which often leads to inconsistent texture between the filled area and the measured area,and the texture tends to be linear,which is inconsistent with the actual situation.To solve this problem,this paper takes the morphological information and distribution of fractures as parameters,constructs an interpolation calculation model,and develops a blank strip filling method that inte-grates the morphological and distribution information of fractures.The filling algorithm can dynamically adjust the weight coefficient of the reference point to the interpolation point according to the relative position relation-ship between the interpolation point and the morphological fitting line of fractures.The texture of the fracture area is coherent and smooth,which is more consistent with the actual morphology and distribution of the frac-ture.The application results of actual logging data show that compared with the traditional filling method,the similarity of the distribution fitting line of fracture filled with this method and the curve after the Hough trans-form increases by more than 25％,and the number of discontinuously filled points decreases by more than 88％,with obvious performance improvement.The application of this method provides more favorable data support for intelligent identification and precise segmentation of various fractures in logging images in the future.
关键词
电测井成像图/空白条带填充/井壁裂缝/反距离迭代插值法Key words
electrical logging images/filling/blank strip wellbore of fractures/inverse distance iterative interpo-lation method引用本文复制引用
基金项目
国家重点研发计划(2023YFB3210205)
出版年
2024
国家科技期刊平台
NSTL
万方数据