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研制成功的声频谱测井仪器在井下发射和接收三种频率的声波信号,其中发射和接收20kHz声波信号的声系有一个发射和四个接收探头,源距为2.1~2.568m,间距为0.156m;发射和接收40kHz声波信号的声系由一个发射和两个接收探头组成,源距1.0~1.5m,间距0.5m;发射和接收10kHz声波信号的声系由一个发射和两个接收探头组成,源距为2.168~2.668m,间距0.5m.用三种不同的频率的声波进行测量记录目的是获得井壁径向深度不同处介质的声学信息,而且不同频率的声波信号在岩石中传播过程中频谱变化也是井壁岩层的可用声学信息.在井下的信息采集、数据传输、地面记录和监控全部由计算机控制.该仪器已经在大庆油田的三口井中成功的进行了野外实验.
Successful acoustic logging tools transmit and receive three types of acoustic signals downhole. The transmitting and receiving acoustic signals of 20 kHz acoustic signals have one transmitting and four receiving probes with a source spacing of 2.1-2.568 m and a spacing of 0.156 m; transmitting and receiving 40kHz acoustic signal sound system consists of a transmitter and two receiver probes, the source of 1.0 ~ 1.5m, spacing 0.5m; transmit and receive 10kHz acoustic signal sound system consists of a transmitter and two receiver probes , The source distance is 2.168 ~ 2.668m, the spacing is 0.5m.The acoustic recordings with three different frequencies are used to obtain the acoustic information of the media at different depths of the borehole wall, and the acoustic signals of different frequencies propagate in the rock The mid-spectrum changes are also the available acoustic information for the borehole rock formation, and the information acquisition, data transmission, ground recording and monitoring in the well are all controlled by the computer, and the instrument has successfully conducted field experiments in three wells in Daqing Oilfield.