| Numerical Simulation of Shear-Horizontal-Wave-Induced Electromagnetic Field in Borehole Surrounded by Porous Formation |
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| 作者姓名： | 崔志文 王克协 孙建国 朱正亚 姚桂锦 胡恒山 |
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| 作者单位： | [1]School of Physics, Jilin University, Changchun 130021 [2]College of Geoexploration Science and Technology, Jifin University 130026 [3]Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA [4]Department of Astronautics and Mechanics, Harbin Institute of Technology, Harbin 150001 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant Nos 40674059 and 10534040 and by Specialized Research Fund for the Doctoral Programme of Higher Education of China under Grant No 20040183045. |
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| 摘 要： | Seismoelectric fieM excited by purely torsional loading applied directly to the borehole wall is considered. A brief formulation and some computed waveforms show the advantage of using shear-horizontal （SH） transverseelectric （TE） seismoelectric waves logging to measure shear velocity in a fluid-saturated porous formation. By assuming that the acoustic field is not influenced by its induced electromagnetic field due to seismoeleetric effect, the coupling governing equations for electromagnetic field are reduced to Maxwell equations with a propagation current source. It is shown that this simplification is valid and the borehole seismoelectric conversion efficient is mainly dependent on the electrokinetic coupling coefficient. The receivers to detect the conversion electromagnetic field and to obtain shear velocity can be set in the borehole fluid in the SH-TE seismoelectric wave log.
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| 关 键 词： | 水平波 电磁场 数字模拟 多孔渗水 |
| 收稿时间： | 2007-03-23 |
Numerical Simulation of Shear-Horizontal-Wave-Induced Electromagnetic Field in Borehole Surrounded by Porous Formation |
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| CUI Zhi-Wen,WANG Ke-Xie,SUN Jian-Guo,ZHU Zheng-Ya,YAO Gui-Jin,HU Heng-Shan.Numerical Simulation of Shear-Horizontal-Wave-Induced Electromagnetic Field in Borehole Surrounded by Porous Formation[J].Chinese Physics Letters,2007,24(12):3454-3457. |
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| Authors: | CUI Zhi-Wen WANG Ke-Xie SUN Jian-Guo ZHU Zheng-Ya YAO Gui-Jin HU Heng-Shan |
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| Affiliation: | School of Physics, Jilin University, Changchun 130021College of Geoexploration Science and Technology, Jilin University 130026Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USADepartment of Astronautics and Mechanics, Harbin Institute of Technology, Harbin 150001 |
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| Abstract: | Seismoelectric field excited by purely torsional loading applied directly to the borehole wall is considered. A brief formulation and some computed waveforms show the advantage of using shear-horizontal (SH) transverse-electric (TE) seismoelectric waves logging to measure shear velocity in afluid-saturated porous formation. By assuming that the acoustic field is not influenced by its induced electromagnetic field due to seismoelectric effect, the coupling governing equations for electromagnetic field are reduced to Maxwell equations with a propagation current source. It is shown that this simplification is valid and the borehole seismoelectric conversion efficient ismainly dependent on the electrokinetic coupling coefficient. The receivers to detect the conversion electromagnetic field and to obtain shear velocity can be set in the borehole fluid in the SH-TE seismoelectric wave log. |
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| Keywords: | 43 20 Fn 43 20 Gp |
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