| 相控线阵声波辐射器在声波测井中应用的可行性分析 |
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| 引用本文： | 乔文孝,杜光升,陈雪莲.相控线阵声波辐射器在声波测井中应用的可行性分析[J].地球物理学报,2002,45(5):714-722. |
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| 作者姓名： | 乔文孝 杜光升 陈雪莲 |
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| 作者单位： | 石油大学(华东) 地球信息科学系,山东东营 257061 |
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| 摘 要： | 通过有限元数值模拟例子，分析了相控线阵的辐射性对声波测井中各种波动模式波的幅度和到达时间等波形特征的影响，以及相控线阵作为声波测井辐射器的可行性.结果表明，只要在相控线阵的各阵元之间施加合适延迟时间的激励信号，就可以调整辐射器的辐射声束的方向，以有利于激发滑行纵波和滑行横波；只要采用相对较低的频率或使用加权相控线阵，就可以增大相控线阵的辐射主瓣角宽，以利于在任意地层有效激励滑行纵波.相控线阵的使用可明显地改善声波测井的测量质量.本文工作为相控线阵声波辐射器在石油勘探中的应用提供了理论依据.
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| 关 键 词： | 声波测井 辐射器 指向性 相控线阵 |
| 文章编号： | 0001-5733(2002)05-0714-09 |
| 收稿时间： | 2001-06-09 |
FEASIBILITY OF APPLICATION OF PHASED ARRAY IN ACOUSTIC WELL-LOGGING |
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| QIAO WEN,XIAO\ \ DU GUANG,SHENG\ \ CHEN XUE,LIAN.FEASIBILITY OF APPLICATION OF PHASED ARRAY IN ACOUSTIC WELL-LOGGING[J].Chinese Journal of Geophysics,2002,45(5):714-722. |
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| Authors: | QIAO WEN XIAO\ \ DU GUANG SHENG\ \ CHEN XUE LIAN |
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| Institution: | Dept . of Geo - Information Science, University of Petroleum, Dongying, 257061, China |
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| Abstract: | In this paper, both characteristics and feasibility of linear phased array in acoustic well-logging are investigated by using FEM simulation. Numerical results show that if appropriate delay times of sources are exerted on elements of phased array, direction of acoustic beam radiated from the phased array can be steered so that the refracted compressional wave and the refracted shear wave can be excited effectively. Moreover, if lower frequency or weighted phased linear array is employed, main lobe of the phased array can be widened so that the refracted compressional wave can be estimulated sufficiently both in hard formation and in soft formation. Therefore, linear phased array can be used to improve quality of well-logging data and enhance both signal-to-noise ratio and exploring capacity of acoustic well-logging radically. |
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| Keywords: | Acoustic well-logging Emitter Directivity linear Phased array |
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