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。
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.
出处
《地球物理学报》
SCIE
EI
CAS
CSCD
北大核心
2004年第4期731-736,共6页
Chinese Journal of Geophysics
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
