scholarly journals A WAY TO INCREASE THE EFFICIENCY OF WATER ISOLATING WORKS USING WATER REPELLENT

2020 ◽  
Author(s):  
Sudad H Al-Obaidi
Keyword(s):  
Porous Medium ◽  
Uniform Distribution ◽  
Physical Models ◽  
Water Inflow ◽  
Water Repellent ◽  
Gas Wells ◽  
Phase Permeability ◽  
Gas Blowing ◽  
Water Saturated ◽  
Density Of Water

A method for isolating water inflow in gas wells is proposed, which consists in pumping a water-insulating composition into the water saturated interval using gas as a blowing fluid. The results of studies on physical models of the reservoir are presented, which prove an increase in the penetrating ability of the water repellent, blockage density of water-permeable channels and a decrease in phase permeability of water. These results were obtained in both water and gas saturated porous mediums. It is observed also that the gas blowing of a water isolating composition contributes in reduction of the reverse removal of the composition from theporous medium, as a result of a more uniform distribution of the water isolating composition in the porous medium.

scholarly journals PROSPECTS FOR IMPROVING THE EFFICIENCY OF WATER INSULATION WORKS IN GAS WELLS

2020 ◽  
Author(s):  
Sudad H Al-Obaidi ◽  
Khalaf FH
Keyword(s):  
Gas Permeability ◽  
Saturated Porous Medium ◽  
Gas Condensate ◽  
Physical Models ◽  
Fuel Oil ◽  
Water Repellent ◽  
Gas Wells ◽  
Volatile Hydrocarbon ◽  
Hydrocarbon Solvent ◽  
Stable Gas Condensate

In the oil industry, the inflow of water into the gas and oil wells represents always an important issue that needs to deal with. In this study a water-repellent composition, which is based on volatile hydrocarbon solvent,was proposed for handling of water isolating work in gas wells. As a volatile hydrocarbon solvent, it was quite promising to use gas condensate and its primary processing products (like stable gas condensate SC and light distillate of gas condensate DGCL). Initially, we studied the effect of compositions based on the ABR water repellent, M100 fuel oil and solvents SC, DGCL and mixed in equal volumes of DGCL + SC on gas permeability ofgas-saturated porous medium. The article presents the results of studies, conducted on physical models of the formation, confirming the efficiency and selectivity of the water-repellent composition impact on the water-cutinterval.

The Characteristics of Porous Solar Wall Heating System with Localized UFAD

2012 ◽  
Vol 178-181 ◽  
pp. 237-243
Author(s):  
Li Ouyang ◽  
Wei Liu
Keyword(s):  
Heat Transfer ◽  
Porous Medium ◽  
Saturated Porous Medium ◽  
Flow Characteristics ◽  
Heating System ◽  
Physical Models ◽  
Air Distribution ◽  
Cable System ◽  
Wall Heating ◽  
Solar Wall

In this paper, the physical models of the porous solar wall heating system with localized underfloor air distribution (UFAD) are established. Based on Brinkman-Forchheimer Extended Darcy and energy two-equation models for saturated porous medium, the influences of the structure of underfloor space on the heat transfer and flow characteristics of the system are simulated, analyzed and compared.The results show that the underfloor space with rational partition is good for improving the heat transfer and flow characteristics of system, and maintaining the cable system in the underfloor space.

scholarly journals Infiltrative instability near topography with implication for the drainage of soluble rocks

2008 ◽  
Vol 12 (6) ◽  
pp. 1285-1293 ◽  
Author(s):  
P. Genthon ◽  
A. Ormond
Keyword(s):  
Growth Rate ◽  
Porous Medium ◽  
Reaction Rate ◽  
Drainage Basin ◽  
Sensitivity Study ◽  
Flow Lines ◽  
Initial Flow ◽  
Underground Channel ◽  
Water Saturated ◽  
Channel Structures

Abstract. We present here numerical modeling of infiltration instability near a topographic edge of a water-saturated porous slice by analogy with a limestone formation devoid of initial heterogeneities such as fractures faults or joints and limited by a vertical cliff. In our runs a first dissolution finger develops near the cliff edge, and ends to intersect it above its mid height. Additional fingers develop upstream with a decreasing growth rate and an increasing width. This results from the decrease of the infiltration velocity with distance to the cliff in our models. A sensitivity study shows that a larger permeability contrast between the fingers and the initial undissolved porous medium produces a larger number of fingers, while increasing the dispersivity (lower Peclet number) produces wider fingers. A slower reaction rate (lower Damkhöler number) produces fingers that follow the initial flow lines, since dissolution occurs simultaneously along the entire finger. These results suggest that alteration by dissolution of limestones or other soluble formations may produce different underground channel structures in the same drainage basin due to local changes of the non-dimensional Pe and Da numbers.

3-D Simulation of Methane/Air Combustion in the Ring Porous Medium Burner

2011 ◽  
Vol 71-78 ◽  
pp. 2153-2157
Author(s):  
Jiang Rong Xu ◽  
Su Juan Hu ◽  
Shan Shan Xu ◽  
Guan Qin Wang
Keyword(s):  
Porous Medium ◽  
Fluid Velocity ◽  
Three Dimensional ◽  
Physical Models ◽  
One Dimension ◽  
Temperature Model ◽  
Dimensional Model ◽  
Adiabatic Wall ◽  
Single Temperature ◽  
Good Agreement

The different mathematical and physical models of one-dimension or two-dimension for premixed air combustion in the ring porous medium burner are reported in the literatures. In this paper, a case of combustion of methane/air ratio 0.6, the fluid velocity 0.2m/s and the adiabatic wall of burner is simulated by three-dimensional single temperature model. The numerical results show a good agreement with two-dimensional model for combustion characteristics, such as temperature and velocity distributions in burner, which provides important theoretical basis for the development of new porous medium burners.

Modeling of Gas-Liquid Flow Through an Interconnected Channel Matrix

2009 ◽  
Author(s):  
Dustin Crandall ◽  
Goodarz Ahmadi ◽  
Duane H. Smith
Keyword(s):  
Porous Medium ◽  
Oil Recovery ◽  
Saturated Porous Medium ◽  
Channel Matrix ◽  
Injection Flow ◽  
Constant Rate ◽  
Fluid Properties ◽  
Geologic Co2 Sequestration ◽  
Gas Liquid Flow ◽  
Water Saturated

The motion of a less viscous, non-wetting gas into a liquid-saturated porous medium is known as drainage. Drainage is an important process in environmental applications, such as enhanced oil recovery and geologic CO2 sequestration. Understanding what conditions will increase the volume of gas that can saturate an initially water-saturated porous medium is of importance for predictions of the total CO2 volume that can be sequestered in known geologic formations. To further the understanding of how drainage flow properties are related to different injection flow-rates, a porous medium consisting of interconnected channels and pores was manufactured to perform bench-top experiments of drainage. Additionally, a finite-volume model of this interconnected channel matrix was constructed. Numerical simulations of constant-rate injection into the model porous medium are first shown to compare favorably to the bench-top experiments. The fluid and injection properties of the drainage process were then varied to evaluate the flow conditions which would maximize the volume of gas trapped within the porous medium. In particular, CO2 displacing brine within the porous medium was modeled, with representative subsurface temperatures and fluid properties. It was shown with these fluid conditions a higher final saturation of the invading less-viscous CO2 was obtained, as compared to air into water experiments at similar injection rates.

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