XMAC斯通利波波场分离方法  

Wave field separation method for Stoneley-wave of XMAC

作　　者：宋延杰[1] 王雪萍[1,2] 何英伟[3] 葛岩[4] 李海成[5] 

机构地区：[1]大庆石油学院地球科学学院,黑龙江大庆163318 [2]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712 [3]大庆油田有限责任公司第五采油厂,黑龙江大庆163513 [4]大庆油田有限责任公司第三采油厂,黑龙江大庆163000 [5]大庆油田有限责任公司采油工程研究院,黑龙江大庆163453

出　　处：《大庆石油学院学报》2008年第5期9-12,121-122,共4页Journal of Daqing Petroleum Institute

摘　　要：岩石斯通利波信息是油气勘探与开发所需要的一种重要资料,利用它的幅度衰减可以确定地层渗透率,寻找裂缝性地层.为了利用斯通利波信息评价储层渗透率,必须进行波场分离.基于斯通利波频率、相位、速度等特征分析,采用一维频率域滤波压制纵横波,提取斯通利波;利用中值滤波分离直达斯通利波和反射斯通利波;使用频率-波数域滤波分离上下行反射斯通利波,从而实现了斯通利波的波场分离.利用波场分离数据计算了斯通利波的中心频率和反射率,与国外软件处理结果对比表明,该方法提取的斯通利波相关信息是可行、适用的.Stoneley wave information of rocks is important in petroleum exploration and exploitation,and Stoneley wave amplitude is used to determine formation permeability and find out permeable zones.In order to evaluate formation permeability with Stoneley wave,wave separation must be done.Based on different characteristics of Stoneley wave frequency,phase and velocity,firstly,Stoneley wave is abstracted with a Fourier domain filter.Then,a median filter is used to obtain direct Stoneley wave,and frequency wave number digital filter is used to separate the up-going and down-going reflected Stoneley-wave sections.The center frequency and reflectivity of Stoneley-wave is calculated with separated Stoneley waves.The processing result is compared with that of commercial software,good agreement has been achieved.It shows the proposed method can be applied in Stoneley wave separation.

关 键 词：斯通利波 频率一波数域滤波 波场分离 直达斯通利波 反射斯通利波 

分 类 号：P631.4[天文地球—地质矿产勘探]