Gas injection into heavy oil reservoirs could result in high ultimate recovery of oil. Experimental studies showed that an application of a combined technology of Gas Assisted Gravity Drainage (GAGD) and Vapor Extraction (VAPEX) could increase final oil recovery of a candidate viscous oil reservoir. In this paper the results of laboratory investigation are presented, including Pressure-Volu...

Elemental sulfur (S8) is often present in considerable amounts in sour gas reservoirs at the reservoir conditions (pressure and temperature). For the isothermal conditions in the reservoir, the reduction in reservoir pressure below a critical value will cause the elemental sulfur to deposit in the formation. Sulfur deposition can cause severe loss in the pore space available for gas, and in tur...

We report the observation of low-energy, low-momenta collective oscillations an exciton-polariton condensate in a round “box” trap. The are dominated by dipole and breathing modes, ratio frequencies two modes is consistent with that weakly interacting two-dimensional trapped Bose gas. speed sound extracted from oscillation frequency smaller than Bogoliubov sound, which can be partly explained i...

A grand canonical system of hard-core bosons in an optical lattice is considered. The bosons can occupy randomly N equivalent states at each lattice site. The limit N → ∞ is solved exactly in terms of a saddle-point integration, representing a weakly-interacting Bose gas. In the limit N → ∞ there is only a condensate if the fugacity of the Bose gas is larger than 1. Corrections in 1/N increase ...

The issues of tectonic structure and oil gas geological zoning the Southern region Ukraine are considered, main differences between existing schemes division presented, essence which lies in different views on taxonomy its individual elements. requirements current legislation relating to classification deposits depending their condition initial reservoir conditions given hydrocarbon studied des...

Polarization-dependent phase-contrast imaging is used to resolve the spatial magnetization profile of an optically trapped ultracold gas. This probe is applied to Larmor precession of degenerate and nondegenerate spin-1 87Rb gases. Transverse magnetization of the Bose-Einstein condensate persists for the condensate lifetime, with a spatial response to magnetic field inhomogeneities consistent w...