%0 Journal Article
%T The effects of stress concentrations of cased hole on induced azimuthal anisotropy velocity distribution<br>套管井应力集中诱导井周波速各向异性的研究
%A LIU Jin-Xia
%A WANG Ke-Xie
%A CAO Zheng-Liang
%A XIE Rong-Hua
%A LIU Ji-Sheng
%A LU Xiu-Mei College of Physics
%A Jilin University
%A Changchun
%A China Test
%A Technology Services Corporation of Daqing
%A Daqing
%A China
%A <br>刘金霞
%A 王克协
%A 曹正良
%A 谢荣华
%A 刘继生
%A 吕秀梅
%J 地球物理学报
%D 2005
%I 
%X According to the need of estimating anisotropy and abnormal stress of formation by cross-dipole logging in a cased hole, we show how stress concentrations affect the velocity distribution of formation around a cased hole, and how the velocity distribution influences the cross-dipole anisotropy measurements by computing the stress distribution of a cased hole subjected to the tectonic stress and applying acoustoelasticity theory. The introduction of casing and cement in a cased hole results in that the range of stress concentrations becomes small. The crossover of shear-waves of radial polarization moves towards the borehole. The azimuthal extremum of shear-waves is changed. But the azimuth of compressional velocity minima can still provide an excellent indicator of the direction of maximum far-field tectonic stress.
%K Stress concentration
%K Cased hole
%K Anisotropy
%K Velocity distribution
%K Cross-dipole
%K Tectonic stress<br>应力集中
%K 套管井
%K 各向异性
%K 波速空间分布
%K 正交偶极
%K 构造应力
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=1E44AE713D8A6DE0&jid=14DC41C59CBF6770055A7D610D53AE46&aid=0319F7490556BAB0&yid=2DD7160C83D0ACED&vid=B6DA1AC076E37400&iid=38B194292C032A66&sid=E5ED9059DE792E50&eid=19402779123D7C0E&journal_id=0001-5733&journal_name=地球物理学报&referenced_num=3&reference_num=14