| 摘要 |
Methods and apparatus to identify layer boundaries (708,710) in subterranean formations are described. An example method of identifying a layer boundary (708,710) of a subterranean formation includes transmitting an acoustic signal from a transmitter (714) into a borehole (702) of the subterranean formation and receiving the acoustic signal at a receiver (716-722) coupled to the downhole tool and spaced from the transmitter (717). Additionally, the example method includes logging an energy value associated with the acoustic signal received by the receiver as the downhole tool is moved in the borehole and identifying a change in the logged energy value associated with an impedance change in the subterranean formation to identify the layer boundary (708,710). |
