Nonlinear Acoustic Borehole Equipment

V.A.Alexandrov, Yu.A.Koriakin, V.A.Maiorov, D.B.Ostrovsky, V.B.Zhelezny, V.B.Zhukov (Central Research Institute "Morphyspribor", St.Petersburg, Russia)

e-mail: mfp@mail.wplus.net

The report deals with current and prospective acoustic parametric transducers intended for borehole geophysics. Characteristics are of various generator devices and acoustic transducers are presented with capability of non-linear action on an area located nearby a hole bottom. Possible mechanisms of action on fluid-saturated hard rocks are described as well as analytical estimations of acoustic pressure at difference frequencies carried out by method of wave fronts for various hard rocks.


Section : 11