Application of neutron radiography to image flow phenomena in porous media

Jasti, J.K.; Fogler, H. Scott

doi:10.1002/aic.690380402

Cited by 61 publications

(28 citation statements)

References 9 publications

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“…This imaging technique is capable of detecting structures of the order of 0.5 micron. Neutron radiography is described in more detail in the literature (Jasti and Fogler, 1992;Lindsay et al, 1990).…”

Section: Neutron Radiographymentioning

confidence: 99%

Influence of transport and reaction on wormhole formation in porous media

1998

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Section: Neutron Radiographymentioning

confidence: 99%

Influence of transport and reaction on wormhole formation in porous media

1998

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“…To image the wormholes, the Wood's metal-filled cores were placed in a beam of thermal neutrons for imaging. Neutron radiography is described in more detail elsewhere in the literature [30,31].…”

Section: Dissolution Channel Characterizationmentioning

confidence: 99%

“…This technique is ideally suited for imaging structures within consolidated porous media because: (1) the matrix is virtually transparent to thermal neutrons and (2) the cadmium-containing Wood's metal is an excellent neutron absorber and thus provides high contrast between the dissolution channels and the consolidated porous matrix [30]. To image the wormholes, the Wood's metal-filled cores were placed in a beam of thermal neutrons for imaging.…”

Section: Dissolution Channel Characterizationmentioning

confidence: 99%

Microemulsion Applications in Carbonate Reservoir Stimulation

Fredd¹,

Hoefner²,

Fogler³

2017

Properties and Uses of Microemulsions

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Carbonate reservoir stimulation involves the injection of reactive fluids, most commonly hydrochloric acid (HCl), into the porous media to enhance the permeability and increase hydrocarbon production. This process results in the formation of highly conductive flow channels, or wormholes, and relies on the deep penetration of reactive fluids into the formation to maximize stimulation success. However, the rapid rate of reaction of HCl with the carbonate rock often limits the depth of live acid penetration. The reaction is mass transfer limited under typical reservoir conditions. As a result, the acid diffusion and convection rates significantly influence the success of the treatments. Microemulsions prepared with HCl as the dispersed phase offer a solution to significantly reduce the effective diffusivity and, hence, increase the depth of stimulation. This chapter presents the results of laboratory studies of carbonate dissolutions using acid microemulsions and highlights case histories of industry applications using macroemulsions for carbonate reservoir stimulation.

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“…Another technique is to use neutron transmission tomography to generate patterns of porosity variations [21].…”

Section: Introductionmentioning

confidence: 99%

Parallel simulation of wormhole propagation with the Darcy–Brinkman–Forchheimer framework

Salama

Sun

2015

Computers and Geotechnics

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The acid treatment of carbonate reservoirs is a widely practiced oil and gas well stimulation technique. The injected acid dissolves the material near the wellbore and creates flow channels that establish a good connectivity between the reservoir and the well. Such flow channels are called wormholes. Different from the traditional simulation technology relying on Darcy framework, the new Darcy-Brinkman-Forchheimer (DBF) framework is introduced to simulate the wormhole forming procedure. The DBF framework considers both large and small porosity conditions and should output better simulation results than the Darcy framework. To process the huge quantity of cells in the simulation grid and shorten the long simulation time of the traditional serial code, a parallel code with FORTRAN 90 and MPI was developed. The experimenting field approach to set coefficients in the model equations was also introduced. Moreover, a procedure to fill in the coefficient matrix in the linear system in the solver was described.After this, 2D dissolution experiments were carried out. In the experiments, different configurations of wormholes and a series of properties simulated by both frameworks were compared. We conclude that the numerical results of the DBF framework are more like wormholes and more stable than the Darcy framework, which is a demonstration of the advantages of the DBF framework. Finally, the scalability of the parallel code was evaluated, and we conclude that superlinear scalability can be achieved.

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Application of neutron radiography to image flow phenomena in porous media

Cited by 61 publications

References 9 publications

Influence of transport and reaction on wormhole formation in porous media

Influence of transport and reaction on wormhole formation in porous media

Microemulsion Applications in Carbonate Reservoir Stimulation

Parallel simulation of wormhole propagation with the Darcy–Brinkman–Forchheimer framework

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