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充液井孔中的相控线阵声波辐射器在地层中产生的声场

ACOUSTIC FIELD IN FORMATION GENERATED BY LINEAR PHASED ARRAY TRANSMITTERS IN FLUID-FILLED BOREHOLES

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【作者】 车小花乔文孝

【Author】 CHE Xiao-Hua QIAO Wen-Xiao Faculty of Natural Resources & Information Technology, University of Petroleum, Beijing 102249, China

【机构】 石油大学资源与信息学院石油大学资源与信息学院 北京102249北京102249

【摘要】 应用有限元法研究了充液井孔中的相控线阵声波辐射器在井外地层中产生的声场 ,探讨了增强声源向地层的某一特定方向辐射的声波能量的方法 .采用相控线阵声波辐射器并调节其参数可以控制由充液井孔向地层中辐射的声波能量的方向 ,使声源向地层中的某个特定方向辐射的纵波能量得到明显提高 .在井间地震勘探和反射声波成像测井等领域中应用相控线阵声波辐射器 ,将有利于增大探测深度、提高探测分辨率和接收信号的信噪比

【Abstract】 Acoustic field in formation generated by linear phased array transmitters in fluid-filled boreholes, as well as the method to intensify the acoustic energy radiated from the source in the borehole to the formation, is investigated using the finite element method (FEM). The direction of the radiated energy to the formation generated by the source in the borehole can be steered by means of adjusting the parameters of the linear phased array transmitter, which can result in obviously intensified radiated energy of the compressional wave in certain direction in the formation. Therefore, the depth and resolution of investigation and signal-to-noise ratio of the received signal can be improved by employing linear phased array transmitters in the area of crosswell seismic survey and the new rising borehole acoustic reflection imaging.

【基金】 国家自然科学基金 ( 4 0 3 740 49);CNPC测井重点实验室资助项目
  • 【文献出处】 地球物理学报 ,Chinese Journal of Geophysics , 编辑部邮箱 ,2004年04期
  • 【分类号】P631
  • 【被引频次】25
  • 【下载频次】186
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