Simulator of Acoustic 2D Navigation ﷯ The acoustic source, mounted on a drillstring, generates a pressure pulse. This excites both tube waves within the borehole and acoustic waves in surrounding formation. The resulting acoustic waves propagate through the formation, experiencing partial reflection on existing acoustic boundaries. Upon reaching borehole walls the reflected waves excite corresponding tube waves, which are being registered by receivers mounted on the drillstring. While incident and reflected waves propagate in the formation, tube waves propagate within borehole reflecting from stabilizers and the bottom of the hole, disturbing reception of the informative signal as well as exciting additional waves in formation. Applications: - Acoustic navigation systems are used for determining location of the bit relative to formation boundaries during horizontal and directional drilling. - Simulator helps studying physical processes and interpreting the measured results. - Helps to determine requirements to the source and receivers. - Assists in finding the optimal parameters of the tool. - Helps to optimize relative locations of transmitter and receiver to minimize signal disturbance.