A high precision computing method for heat transfer in the process of oil-water displacement

The effect of Prandtl number of a medium on heat transfer across a horizontal layer was measured. Stainless steel particles of diameters 1.6, 3.2, and 4.8 mm, glass particles of diameters 2.5 and 6.00 mm, and lead particles of diameter 0.95 mm were used with silicon oil, water, and mercury as working fluids. The bed height was varied from 2.5 to 12 cm. Experimental results are presented showing Nusselt number as a function of medium Rayleigh number with the effective Prandtl number, defined as the product of medium Prandtl number and Kozeny–Carmen constant, serving as a parameter. Correlations for Nusselt number are given for effective Prandtl number less than 0.1 and for effective Prandtl number greater than 0.1, which corresponds to an infinite effective Prandtl number. For the steel–water case the wavenumber is shown as a function of medium Rayleigh number.

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Experimental Investigation on Oil Enhancement Mechanism of Hot Water Injection in tight reservoirs

Open Physics ◽

10.1515/phys-2016-0079 ◽

2016 ◽

Vol 14 (1) ◽

pp. 703-713 ◽

Cited By ~ 1

Author(s):

Hao Yongmao ◽

Lu Mingjing ◽

Dong Chengshun ◽

Jia Jianpeng ◽

Su Yuliang ◽

...

Keyword(s):

Oil Recovery ◽

Water Saturation ◽

Water Injection ◽

Hot Water ◽

Water Flooding ◽

Water Displacement ◽

Pore Characteristics ◽

Irreducible Water Saturation ◽

Tight Reservoirs ◽

Oil Water

AbstractAimed at enhancing the oil recovery of tight reservoirs, the mechanism of hot water flooding was studied in this paper. Experiments were conducted to investigate the influence of hot water injection on oil properties, and the interaction between rock and fluid, petrophysical property of the reservoirs. Results show that with the injected water temperature increasing, the oil/water viscosity ratio falls slightly in a tight reservoir which has little effect on oil recovery. Further it shows that the volume factor of oil increases significantly which can increase the formation energy and thus raise the formation pressure. At the same time, oil/water interfacial tension decreases slightly which has a positive effect on production though the reduction is not obvious. Meanwhile, the irreducible water saturation and the residual oil saturation are both reduced, the common percolation area of two phases is widened and the general shape of the curve improves. The threshold pressure gradient that crude oil starts to flow also decreases. It relates the power function to the temperature, which means it will be easier for oil production and water injection. Further the pore characteristics of reservoir rocks improves which leads to better water displacement. Based on the experimental results and influence of temperature on different aspects of hot water injection, the flow velocity expression of two-phase of oil and water after hot water injection in tight reservoirs is obtained.

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A higher resolution edge-based finite volume method for the simulation of the oil-water displacement in heterogeneous and anisotropic porous media using a modified IMPES method

International Journal for Numerical Methods in Fluids ◽

10.1002/fld.4254 ◽

2016 ◽

Vol 82 (12) ◽

pp. 953-978 ◽

Cited By ~ 6

Author(s):

Rogério Soares da Silva ◽

Paulo Roberto Maciel Lyra ◽

Ramiro Brito Willmersdorf ◽

Darlan Karlo Elisiário de Carvalho

Keyword(s):

Porous Media ◽

Finite Volume Method ◽

Finite Volume ◽

Water Displacement ◽

Anisotropic Porous Media ◽

Oil Water ◽

Edge Based ◽

Volume Method

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Calculation of Heat Transfer in Heterogeneous Structures such as Honeycomb by Using Numerical Solution of Stochastic Differential Equations

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1016.758 ◽

2014 ◽

Vol 1016 ◽

pp. 758-763 ◽

Cited By ~ 3

Author(s):

Sergey A. Gusev ◽

Vladimir N. Nikolaev

Keyword(s):

Heat Transfer ◽

Differential Equations ◽

Numerical Solution ◽

Stochastic Differential Equations ◽

Parabolic Problem ◽

Generalized Solution ◽

Discontinuous Coefficients ◽

Parabolic Boundary ◽

Heterogeneous Structures ◽

Computing Method

A computing method of heat transfer in heterogeneous structures is proposed in the paper. The problem is mathematically described as the parabolic boundary value problem with discontinuous coefficients. The generalized solution of this parabolic problem can be approached by the solution of the parabolic boundary problem with smoothed coefficients. To obtain estimates of the solution of the problem with smoothed coefficients the method of numerical solution of stochastic differential equations (SDE) is applied. Some numerical results for honeycomb structures are presented.

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