scholarly journals Prediction of the low-velocity distribution from the pore structure in simple porous media

2017 ◽  
Vol 2 (12) ◽  
Author(s):  
Pietro de Anna ◽  
Bryan Quaife ◽  
George Biros ◽  
Ruben Juanes
Keyword(s):  
Porous Media ◽  
Velocity Distribution ◽  
Pore Structure ◽  
Low Velocity

scholarly journals An Experimental Measurement of the Permeability of Deformable Porous Media

1986 ◽  
Vol 85 ◽  
Author(s):  
A. Ambari ◽  
B. Gauthier-Manuel ◽  
E. Guyon
Keyword(s):  
Porous Media ◽  
Pore Structure ◽  
Experimental Measurement ◽  
Sol Gel ◽  
Main Difficulty ◽  
Present Measurement ◽  
Deformable Porous Media ◽  
Sol Gel Transition ◽  
Differential Permeability ◽  
Gel Transition

ABSTRACTKnowledge of the evolution of the permeability of cement throughout the course of hydration provides a suitable means to evaluate the evolution of the pore structure. The main difficulty is to measure permeability without disturbing the tenuous structure of the material at the beginning of the hydration. We have developed a differential permeability technique in which the applied flow is sufficiently weak that the structure of the medium is not disturbed. As an example of application of this technique we present measurement of the evolution of the critical permeability during a sol-gel transition.

Changes in multi-phase flow properties of carbonate porous media during CO2 injection

2020 ◽  
Vol 60 (2) ◽  
pp. 672
Author(s):  
Mojtaba Seyyedi ◽  
Ausama Giwelli ◽  
Cameron White ◽  
Lionel Esteban ◽  
Michael Verrall ◽  
...  
Keyword(s):  
Porous Media ◽  
Pore Structure ◽  
Relative Permeability ◽  
Carbonate Rock ◽  
Trapping Potential ◽  
Co2 Injection ◽  
Phase Flow ◽  
Residual Trapping ◽  
Multi Phase Flow ◽  
Multi Phase

Impacts of fluid–rock geochemical reactions occurring during CO2 injection into underground formations, including CO2 geosequestration, on porosity and single-phase permeability are well documented. However, their impacts on pore structure and multi-phase flow behaviour of porous media and, therefore, on CO2 injectivity and residual trapping potential, are yet unknown. We found that CO2-saturated brine–rock interactions in a carbonate rock led to a decrease in the sweep efficiency of the non-wetting phase (gas) during primary drainage. Furthermore, they led to an increase in the relative permeability of the non-wetting phase, a decrease in the relative permeability of the wetting phase (brine) and a reduction in the residual trapping potential of the non-wetting phase. The impacts of reactions on pore structure shifted the relative permeability cross-point towards more water-wet condition. Finally, calcite dissolution caused a reduction in capillary pressure of the used carbonate rock. For CO2 underground injection applications, such changes in relative permeabilities, residual trapping potential of the non-wetting phase (CO2) and capillary pressure would reduce the CO2 storage capacity and increase the risk of CO2 leakage.

Imaging of Single Phase Flow in Porous Media by High Resolution MRI

2010 ◽  
Vol 113-116 ◽  
pp. 126-131 ◽  
Author(s):  
Lan Lan Jiang ◽  
Yong Chen Song ◽  
Yu Liu ◽  
Yue Chao Zhao ◽  
Ning Jun Zhu ◽  
...  
Keyword(s):  
Porous Media ◽  
High Resolution ◽  
Velocity Distribution ◽  
Flow Direction ◽  
Spin Echo ◽  
Flow Distribution ◽  
Flow In Porous Media ◽  
Mean Velocity ◽  
High Resolution Mri ◽  
Spin Echo Sequence

This paper presents the single flow in porous media to investigate CO2 flow velocity in porous media.We used high resolution MRI to visualize the fluid flow distribution and measure axial mean velocity in porous media.In the experiment, the porous media sample was packed with glass beads, with a porosity of around 0.4. Based the traditional spin echo sequence, we modified the sequence with flow encoding gradients in the flow direction .The sample was saturated. The water flow rates were 1ml/min、2ml/min、3ml/min and 5ml/min,respectively. First, the sequence was calibrated by pipe flow without porous media. As expected, the experimental images show parabolic velocity distribution. The velocity in the centre is high. Then the sample was measured with the same sequence. The images show that the velocity distribution is homogeneous in the porous media. In the boundary of the sample, the velocities are low because of wall-effect. Moreover, the mean velocities calculated from MRI images agree with the real velocities.These errors between calculated velocities and real velocities are small. It may be reduced by changing the experiment conditions.MRI is a useful technology for measuring flow in porous media.

RECENT ADVANCES ON FRACTAL MODELING OF PERMEABILITY FOR FIBROUS POROUS MEDIA

Fractals ◽  
2015 ◽  
Vol 23 (01) ◽  
pp. 1540006 ◽  
Author(s):  
JIANCHAO CAI ◽  
LIANG LUO ◽  
RAN YE ◽  
XIANGFENG ZENG ◽  
XIANGYUN HU
Keyword(s):  
Porous Media ◽  
Pore Structure ◽  
Fractal Geometry ◽  
Influence Factor ◽  
Fractal Model ◽  
Fibrous Materials ◽  
Permeability Model ◽  
Fractal Modeling ◽  
Fibrous Porous Media ◽  
Future Work

Permeability is an important hydraulic parameter for characterizing heat and mass transfer properties of fibrous porous media. However, it is difficult to be quantitatively predicted due to the complex and irregular pore structure of fibrous porous media. Fractal geometry has been verified to be an effective method for determining the permeability of fibrous porous media. In this study, recent works on the permeability of fibrous porous media by means of fractal geometry are reviewed, the advances for each presented fractal model are analyzed and summarized, parameter equations used in available fractal permeability models are also briefly compared and reviewed. Future work for more generalized permeability model of fibrous porous media need to conducted by considering the special characters of fibrous materials, uniform pore structure parameter model and the influence factor of capillary pressure, electrokinetic phenomena, etc.

Predicting the Performance of the Acid-Stimulation Treatments in Carbonate Reservoirs With Nondestructive Tracer Tests

SPE Journal ◽  
2015 ◽  
Vol 20 (06) ◽  
pp. 1238-1253 ◽  
Author(s):  
A.S.. S. Zakaria ◽  
H.A.. A. Nasr-El-Din ◽  
M.. Ziauddin
Keyword(s):  
Porous Media ◽  
Pore Structure ◽  
Carbonate Rocks ◽  
Tracer Tests ◽  
Structure Characterization ◽  
Hydrochloric Acid Concentration ◽  
Thin Sections ◽  
Characterization Methods ◽  
Core Samples ◽  
Flow Through

Summary Carbonate formations are very complex in their pore structure and exhibit a wide variety of pore classes, such as interparticle porosity, moldic porosity, vuggy porosity, and microporosity. Geologists have defined carbonate pore classes on the basis of sedimentology, thin sections, and porosity/permeability relationships, but the question remains concerning how these pore classes govern the acid flow through porous media. Core samples from six different carbonates, mainly limestone, were selected for the study. The samples were first investigated with thin-section analysis, high-pressure mercury-injection tests, and nuclear-magnetic-resonance measurements for pore-structure characterization, and X-ray diffraction for mineralogy examination. Next, tracer experiments were conducted, and the tracer-concentration profiles were analyzed to quantify the carbonate pore-scale heterogeneity. The heterogeneity is expressed with a parameter f—the available fraction of pore structure contributing to the flow. The data were used to study the flow of acid through carbonate rocks and correlate the pore classes to the acid response. More than 30 acid-coreflood experiments were conducted at 150°F and a hydrochloric acid concentration of 15 wt% on 1.5 × 6-in. core samples at different injection rates on each carbonate rock type. The objective of these sets of experiments is to determine the acid pore volume to breakthrough for each carbonate pore class. The findings of this study help us to connect the results from different characterization methods to the acid flow through the porous media of carbonate rocks. It was also found that the response of the acid depends on the carbonate pore classes. Application to the design of matrix acid treatments in carbonate rocks is discussed.

Modeling the pore structure of porous media

1972 ◽  
Vol 8 (3) ◽  
pp. 699-706 ◽  
Author(s):  
D. A. Farrell ◽  
W. E. Larson
Keyword(s):  
Porous Media ◽  
Pore Structure
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