gas

3D model and numerical algorithm for gas filtration in porous media

The article presents a three-dimensional mathematical model of the gas filtration process in porous media and a numerical algorithm for solving the initial-boundary value problem.  The developed model is described using the nonlinear differential equation in partial derivatives with the appropriate initial and boundary conditions.  The proposed mathematical apparatus makes it possible to carry out hydrodynamic calculations taking into account changes in the main factors affecting the process under consideration: permeability, porosity, and thickness of layers, gas recovery coefficient, visc

Synergistic Effect of Ultrasound Cavitation and Gas in the Water Disinfection

The paper considers water purification processes from Bacillus bacteria type under the conditions of gases bubbling only (argon, helium, oxygen, and carbon dioxide), cavitation and combined action of gas and cavitation. The synergistic effect was found under conditions of simultaneous action of gas and cavitation (kd(gas/US ) >kd(gas) + kd(US) almost double) and it was shown that kd(gas/US) >kd(gas) by almost an order of magnitude. Relative series of effective destruction of microbial cells was established: Ar/US > О2/US >Не/US > СО2/US.

Correlation between Diameter of Microorganisms and Efficiency of Microorganisms Destruction under Gas/Cavitation Conditions

The values of еffective rate constants of microorganisms destruction (kd) were compared, depending on the diameter of cells and gas nature bubbling under cavitation conditions. The efficiency of cell destruction under Ar/US is larger by 2–2.5 times compared to He/US, O2/US and CO2/US. Yeast cells were destroyed faster than bacteria (kd (yeast cells) >> kd (bacteria cells)) that is explained by the cells size. The cell stability under cavitational conditions is reversely proportional to the cell diameter.

Gas Nature Effect on the Destruction of Various Microorganisms Under Cavitation Action

The disinfection of water from Diplococcus, S.lutea, B.cereus, and Ps.fluorescens bacteria types and the yeast Sacch.cerevisiae via the joint action of gas/US has been investigated. The investigated microorganisms were identified in natural water and wastewater in dominant amounts. The relative ranges of effective cell destruction by combined gas/US action have been established. The most efficient microorganism destruction has been obtained using Ar/US compared to Не/US, СО2/US and О2/US and is accounted for by those gas properties able to affect sonochemical activity.

CONSTRUCTION OF GAS GATHERING PIPELINES FOR STABLE PRODUCTION OF CARBOHYDRATES

The article deals with the existing system of gas pipelines between hydrocarbon production facilities at the Yuliivskyi oil and gas condensate production facility (YOGCPF). This system of gas pipelines ensures the flow of hydrocarbon raw materials from the wells of Narizhnianske, Yuliivske and Skvortsivske oil and gas condensate fields to the complex gas treatment unit (CGTU). The preliminary treatment of natural gas from mechanical impurities, liquid, hydrocarbon condensate and water is carried out at gas preparation plants of these fields.

Possibility of mobile geophysical technologies during oil and gas prospecting and exploration

The mobile geophysical technology include a special method of the remote sensing data processing and interpreting, aerial mapping method of the forming short-pulsed electromagnetic field (FSPEF), method of vertical electric-resonance sounding (VERS). Inclusion of such technologies in traditional complex of exploration geological-geophysical methods will promote both minimization of the financial expenses on the oil-and-gas exploration problems solving, and essential reduction of time for their practical realization.

About direct search methods as a means of training structures drilling in the search for oil and gas

The analysis of forecast for potentially oil-and-gas bearing areas within has been provided by direct methods. The complexification approach of geochemical and geophysical methods for increasing performance of hydrocarbons deposits exploration has been considered.

On detection of gas accumulations in dense sandstones with mobile geophysical methods

Purpose. The results of the application of frequency-resonance technology of remote sensing (RS) data processing and interpretation and geoelectric methods of forming short-pulsed electromagnetic field (FSPEF) and vertical electric-resonance sounding (VERS) for gas accumulations searching in tight sandstones of Dnieper-Donetsk basin (DDB) are analyzed. Design/methodology/approach.

Estimation of hydrocarbon potential of the perspective structures in Barents sea

Purpose. The results of the hydrocarbon (HC) potential assessment of some structures and fields in Barents Sea by the frequency resonance method of the remote sensing (RS) data processing and interpretation are discussed. Design/methodology/approach. Experiments were carried out with the mobile technology of frequency-resonance processing and interpretation of remote sensing data using, which is the "direct" method of mineral deposits exploration and operates within the "substantial" paradigm of geophysical investigations.