employed for separating the plug section 48 from the tool 38 fig6 is a side schematic view of an embodiment of the tool 38 within the primary wellbore 3 signal paths 52 54 are provided within the wellbore 2 illustrating an example of a seismic signal direction path 52 represents a signal from the acoustic transducers 45 directed to the wellbore wall w p within the primary wellbore 3 similarly path 54 illustrates acoustic signal propagation when directed to the wall w l within the lateral wellbore in the example of fig6 the lateral wellbore is lateral wellbore 5 fig7 represents an overhead cutaway view demonstrating an example of signal travel from the sensors 45 and their ensuing reflections from the wellbore wall w p the sensors 45 are provided at multiple positions around the tool axis a t within the lateral detector 44 although the tool 38 is oriented having its axis a t set apart from the primary wellbore axis a w embodiments exist wherein the axes are substantially aligned in the embodiment of fig7 acoustic signals generated within the primary wellbore 3 are represented by arrows 56 shown directed towards the primary wellbore 3 wall w p the acoustic signals 56 reflect from the wall w p and form a reflected signal 58 in the embodiment shown the acoustic signals 56 are oriented away from the tool 38 in a direction perpendicular to the axis a t consequently the reflected signal 58 propagates in a direction substantially along the path of the acoustic signal 58 and towards the tool 38 however other embodiments are available wherein.