摘要
根据超声波在媒质中的波动方程 ,在合理简化的基础上 ,推导出了超声波在井液及岩层中的波函数、声压、质点振动速度 ,求出了超声换能器的辐射阻抗。讨论了超声换能器半径、油井半径、井液和岩层的声速及密度对超声换能器辐射阻抗的影响。得出 :超声换能器在不同油井中使用时 ,由于油井中井液及岩层参数的不同 ,可导致超声换能器辐射阻抗的变化 。
The wave function,sound pressure and particle vibrational volecity of ultrasonic wave in well liquid and rocks statum are derived in the case of reasonable simplification according to the wave differential equation,and the radiation impedance is extracted.The influence of oilwell radius,ultrasonic transducer radius,well liquid density and sonic volecity in well liquid and rocks stratum on the radiation impedance of the ultrasonic transducer are discussed. The conclusion is obtained that the sphere of action of the ultrasonic transducer changes with the parameters of well liquid and rocks stratum,which can affect the radiation power of the ultrasonic transducer.
出处
《石油仪器》
2003年第6期1-4,60,共4页
Petroleum Instruments
