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fracturing
Hydraulic fracturing in an inhomogeneous reservoir
      
A method of estimating the change in well productivity resulting from the hydraulic fracturing of a finite reservoir, piecewise-homogeneous in the horizontal and vertical directions, with an arbitrary number of cracks is proposed.
      
A correction coefficient that enables these estimates to take into account the effect of capillary trapping of mud and fracturing fluid filtrate is derived [1, 2].
      
The electric signals produced by fracturing rods made of different metals immersed in a high-temperature jet of combustion products are measured.
      
The ultrastructure of UMB cells has been studied using ultrathin sections and freeze-fracturing.
      
These signals are processed using cluster analysis, which makes it possible to separate the signals emitted by a propagating fatigue crack in the stringer region from the signals arriving from the region of the fracturing gripping jaw.
      
These signals are processed using cluster analysis, which makes it possible to separate the signals emitted by a propagating fatigue crack in the stringer region from the signals arriving from the region of the fracturing gripping jaw.
      
Presence of the reversed hexagonal phase in the thylakoid membranes has been already reported in our previous papers and by other authors using 31P-NMR and freeze-fracturing techniques.
      
We failed to model a dense radial fracturing, which is typical of the earliest stage of corona evolution.
      
At the final stage of evolution of this corona, traces of its rejuvenation and the origin of a new system of radial fracturing in the central part of the corona are observed.
      
The process of formation of the dense radial fracturing in novae due to the mechanical elevation caused by the formation of a rising dome, which was suggested by many authors, is not corroborated by our models.
      
Microwave fracturing and grinding of solid rocks by example of kimberlite
      
The stress fields in the Tunka Rift at the southwestern flank of the Baikal Rift Zone are reconstructed and analyzed on the basis of a detailed study of fracturing.
      
The influence of rock fracturing on the hydraulic dispersion parameters is studied by numerical simulation.
      
The mass transfer is calculated within a broad range of fracturing parameters with separate cracks being explicitly incorporated.
      
The numerically obtained implicit dependence of the effective dispersion parameters on fracturing prameters is approximated by analytical expressions.
      
Fluid pressure and hydraulic fracturing in hydrothermal ore formation at gold deposits
      
Development conditions and possible implications of hydraulic fracturing for ore formation are considered.
      
For Inada granite, there is no clear clustering of acoustic emission events in time and space, thus it is difficult to exactly deduce the time and position of the major fracturing.
      
While for Mayet granite, acoustic emission events are clustered in time and space, so the time and position of the major fracturing can be exactly predicted according to microfracturing process.
      
 

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