低序级断层结构导向坎尼属性边缘检测识别方法  

Low-order fault structure-oriented Canny property edge detection and recognition method

作　　者：马玉歌 苏朝光[1] 张健[1] 刘军胜 MA Yu-Ge;SU Chao-Guang;ZHANG Jian;LIU Jun-Sheng(Geophysical Research Institute of SINOPEC Shengli Oilfield Company,Dongying 257022,China;International Department of Sinopec Geophysical Corporation,Beijing 100020,China)

机构地区：[1]中国石化胜利油田分公司物探研究院,山东东营257022 [2]中国石化地球物理公司国际业务中心,北京100020

出　　处：《物探与化探》2020年第3期698-703,共6页Geophysical and Geochemical Exploration

基　　金：国家科技重大专项“大型油气田及煤层气开发”(2016ZX05011-02);胜利油田分公司课题“低序级断层识别描述技术深化研究”(YKY1801)。

摘　　要：常规的断层检测属性对地层产状相对较平、地震反射特征明显的低序断层有识别效果,在地层倾斜或者地层倾角变换剧烈的地方对低序级断层的识别效果很差。针对以上难点,在深入分析低序级断层地质特点和地震响应特征的基础上,对基于三维多级盲源分离与保构造滤波组合去噪的结构导向坎尼属性边缘检测低序级断层识别方法开展了研究,形成了一种有效的低序级断层识别方法,提高了低序级断层的识别能力。和相干属性对比来看,结构导向坎尼属性边缘检测结果噪声干扰更小,特别是在地层较陡或者地层产状波动较大(即地层倾角变化大)的地方,结构导向坎尼属性边缘检测结果更佳。所得结果与实钻井吻合效果好,解决了研究区的油水关系,多发现了5条低序级断层,新钻探井获得高产油流。Conventional fault detection attributes can identify low-sequence faults with relatively flat stratigraphic attitudes and obvious seismic reflection characteristics.Low-order faults are poorly identified in places where strata are inclined or the dip angle of strata changes drastically.In view of the above difficulties,on the basis of an in-depth analysis of the geological characteristics and seismic response characteristics of low-order faults,the authors carried out the research based on a method for identifying low-order faults based on the structure-oriented Canny attribute edge detection according to the combination of 3D multi-level blind source separation and structural preservation filtering denoising,and formed an effective low-order fault identification method,which improved the capability of low-order fault identification.Compared with coherent attributes,the noise detection results of the structure-oriented Canny attribute edge detection are smaller,especially in places where the stratum is steep or the attitude of the formation fluctuates greatly(that is,the formation dip angle changes greatly).The results are better.The obtained results are in good agreement with real drilling results,and the oil-water relationship in the study area is solved.Five more low-order faults were discovered,and new drilling wells have achieved high oil production flow.

关 键 词：多级盲源分离 保构造滤波 结构导向梯度属性 低序级断层 

分 类 号：P631.4[天文地球—地质矿产勘探]