Based on the results of experimental observations, mathematical models of the impact of the factors under study on repression-wave colmatation are obtained. The values of the factors are established at which mud solutions acquire a higher resistance to sedimentation of the solid phase due to its concurrent dispersion increasing the efficiency of colmatation of absorbing hole sections.

На основании результатов экспериментальных наблюдений получены математические модели влияния исследуемых факторов на параметры репрессионно-волновой кольматации. При этом установлены значения исследуемых факторов, при которых глинистые растворы приобретают более высокую устойчивость к седиментации твердой фазы за счет ее попутного диспергирования, что повысило эффективность кольматации поглощающих интервалов в стволе скважины.

This work is devoted to studying the compression of cavitation bubbles by viscous liquid and the rate of steam compression in it within a wide range of Reynolds numbers. The influence of heat conductivity in bubble, the compressibility of liquid and evaporation/condensation on the surface of the bubble have been studied. It has been shown that the maximal pressure inside of the bubble increases sharply in a small neighborhood of some critical value with growth in the Reynolds number. This critical value is close to the one established by Zababakhin, which separates regimes of the bubble collapse in incompressible liquid for finite and infinite times.

The results of studying wave impact on a productive bed for extraction of capillary hydrocarbons are presented. The studies were conducted on experimental equipment that which simulates filtration processes in a system of hydrodynamically related wells. Impact waves are considered that propagated from a processed well inside a bed via a system of fractures and faults with higher permeability. It is shown that impact pressure pulses intensify filtration due to the involvement of capillary hydrocarbons and to the increase in permeability of the porous medium.

The force acting on particles or liquid droplets located in pores in the wave field is investigated in dependence on the wave frequency and the distances from the source.

The possibility of well stimulation via wave impact has been studied. The effect of an increase in the filtration capacity of the bottomhole zone in a reservoir observed during treatment with high-frequency waves has been surveyed.

The motion of gas inclusions in a liquid-filled duct under the action of vibration for comparable cross-sectional dimensions of the inclusion and the duct is studied. Two limiting cases of inclusion motion differing with respect to the drag mechanism are considered. For low velocities, it is assumed that the drag is mainly determined by the capillary forces and the friction in the liquid film separating the gas inclusion from the duct wall. As the inclusion velocity increases, the main contribution to the drag is made by such mechanisms as flow separation, the formation of a low-pressure region in the wake, etc.

A “passive” method of flow stability control is proposed. Control is achieved exclusively by varying the boundary conditions for the disturbance on the permeable wall. This passive method is shown to be quite effective for the boundary layer on a flat plate and for Poiseuille flow. In both cases, depending on the structure of the permeable wall, both stabilization and significant destabilization of the flow are possible.

Arbitrary three-dimensional perturbations are considered. It is established that as the compliance of the walls increases, oblique waves become the most dangerous, which essentially differentiates the system in question from Poiseuille flow in a rigid channel. The flow stability is analyzed over a broad interval of values of the elasticity parameter overlapping the values for real materials.