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Acoustic waves resonance absorption and its use for monitoring of the porous reservoirs development

Authors: N.A. Cheremisin (Tyumen Branch of SurgutNIPIneft), A.N. Cheremisin (Lavrentyev Institute of Hydrodynamics Siberian Branch of RAS)
On the basis of theoretical model of low-frequency acoustic vibrations effect on the oil-saturated porous reservoir, it is shown, that at acoustic waves propagation in biphase fluid saturated porous hydrophilic media the existence of the additional damping mechanism, connected with а resonance absorption of a wave energy by a capillary-trapped part of residual oil, is possible. The size of additional absorption factor depends on a wave frequency, reservoir parameters and a current reservoir oil-saturation in absorption zone. It is shown, that it is possible to determine the distribution of residual reserves on the area of an investigated site and to specify a stage of its development, using system - a source in one well - receivers in the next wells.
On the basis of theoretical model of low-frequency acoustic vibrations effect on the oil-saturated porous reservoir, it is shown, that at acoustic waves propagation in biphase fluid saturated porous hydrophilic media the existence of the additional damping mechanism, connected with а resonance absorption of a wave energy by a capillary-trapped part of residual oil, is possible. The size of additional absorption factor depends on a wave frequency, reservoir parameters and a current reservoir oil-saturation in absorption zone. It is shown, that it is possible to determine the distribution of residual reserves on the area of an investigated site and to specify a stage of its development, using system - a source in one well - receivers in the next wells.


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