%0 Journal Article
%T The electromagnetic modeling of logging-while-drilling tool in tilted anisotropic formations using vector finite element method<br>用矢量有限元方法模拟随钻测井仪在倾斜各向异性地层中的电磁响应
%A SUN Xiang-Yang
%A NIE Zai-Ping
%A ZHAO Yan-Wen
%A LI Ai-Yong
%A LUO Xi
%A <br>孙向阳
%J 地球物理学报
%D 2008
%I 
%X In this study,the vector finite element method is used to simulate and analyze the logging-while-drilling electromagnetic response of tilted sedimentary formation with electric anisotropy.In order to best model steel mandrel,borehole and the transmitter,the hexahedral mesh based on cylindrical coordinate is applied here.Meanwhile,the basis function of higher order vector basis function is used to describe the field of each mesh unit,so the number of mesh units and the number of unknowns is reduced.The 3-D finite element program is validated by comparing the results calculated from numerical mode matching(NMM)in simple formations and from finite difference time-domain(FDTD),which show good agreement.It is then used to simulate the resistivity responses of LWD tools in anisotropic formations with different anisotropic coefficients and different dipping angles,which is helpful to the correction of the influence imposed by anisotropic and tilted formations and helpful to obtain a correct hydrocarbon evaluation.
%K Logging-while-drilling
%K Anisotropy
%K Vector finite element method
%K Numerical mode matching
%K Finite difference time-domain<br>随钻测井
%K 各向异性
%K 矢量有限元法
%K 数值模式匹配
%K 时域有限差分
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=1E44AE713D8A6DE0&jid=14DC41C59CBF6770055A7D610D53AE46&aid=21980F24C034014D02D026513B29EEA1&yid=67289AFF6305E306&vid=987EDA49D8A7A635&iid=94C357A881DFC066&sid=22E618DED444E3B5&eid=BF7851EF606736C9&journal_id=0001-5733&journal_name=地球物理学报&referenced_num=8&reference_num=18