Abstract
AbstractRealization of sonically induced polarization (SIP) logging is based on studies of the borehole SIP effect. This effect is essentially the conversion of acoustic waves into electromagnetic waves in a two‐phase porous media, which results in the formation of borehole sonic‐electric conversion wave‐fields, and eventually causes the conversion of acoustic radiation energy into electromagnetic energy. In this paper the overall energy composition of borehole sonic‐electric conversion wave‐fields is examined in terms of theoretical analysis of the energy components in sonic‐electric conversion wave‐fields in a two phase porous media. The concept of electrical energy volumetric density of borehole low‐frequency SIP electrical field is proposed, and its expression is derived. By means of modeling of borehole low‐frequency SIP electrical fields with real formation parameters, the relationship between acoustic frequencies and formation parameters with electrical energy volumetric density in borehole low‐frequency SIP processes is established.
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