Roman Y. Makhnenko
University of Illinois at Urbana–Champaign
Pore water pressureGeologyOil shaleComposite materialAcoustic emissionFault (geology)Permeability (earth sciences)PoromechanicsGeotechnical engineeringMaterials scienceCaprockHorizon (archaeology)European unionFluid injectionEuropean researchPetrologyTerm (time)Sedimentary rockPorosityPetroleum engineeringInduced seismicity
68Publications
12H-index
331Citations
Publications 70
Newest
#1Etienne Cassini (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 1
#2Danila Mylnikov (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 1
Last. Roman Y. Makhnenko (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 12
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Hydromechanical properties of shales are complex due to the involved material structure, with the solid matrix being mainly formed by swelling clays and porosity dominated by nanometer scale tortuous voids with large aspect ratios. Intrinsic permeability of restructured Opalinus Clay (Swiss shale) brought to shallow geological storage conditions was measured with in situ brine. Under constant temperature, vertical stress, and downstream fluid pressure, steady-state flow experiments show a signif...
1 CitationsSource
#1Roman Y. Makhnenko (UIUC: University of Illinois at Urbana–Champaign)H-Index: 12
#2Víctor VilarrasaH-Index: 23
#1Roman Y. Makhnenko (UIUC: University of Illinois at Urbana–Champaign)H-Index: 12
#2Joseph F. LabuzH-Index: 32
Localization in terms of a bifurcation from a homogeneous pattern of deformation is predicted to be different if the boundary conditions are drained or undrained. This phenomenon is evaluated in plane strain compression experiments with water-saturated Berea sandstone, where corresponding poroelastic and inelastic properties were measured. Non-uniformity of lateral deformation and clustering of acoustic emission events were used as the experimental evidence of localization, which occurred soon a...
Source
#1Joseph F. LabuzH-Index: 32
#2Roman Y. Makhnenko (UIUC: University of Illinois at Urbana–Champaign)H-Index: 12
Last. Luigi Biolzi (Polytechnic University of Milan)H-Index: 26
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1 CitationsSource
#1Roman Y. MakhnenkoH-Index: 12
#2Joseph F. LabuzH-Index: 32
#1Víctor Vilarrasa (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 23
#2Roman Y. Makhnenko (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 12
Last. Sohrab Gheibi (NTNU: Norwegian University of Science and Technology)H-Index: 5
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Abstract Large amounts of carbon dioxide (CO2) should be injected in deep saline formations to mitigate climate change, implying geomechanical challenges that require further understanding. Pressure build-up induced by CO2 injection will decrease the effective stresses and may affect fault stability. Geomechanical effects of overpressure induced by CO2 injection either in the hanging wall or in the foot wall on fault stability are investigated. CO2 injection in the presence of a low-permeable fa...
29 CitationsSource
#1Roman Y. Makhnenko (UMN: University of Minnesota)H-Index: 12
#2Joseph F. Labuz (UMN: University of Minnesota)H-Index: 32
In situ rock is often saturated with fluid, the presence of which affects both elastic parameters and inelastic deformation processes. Techniques were developed for testing fluid-saturated porous rock under the limiting conditions of drained (long-term), undrained (short-term) and unjacketed (solid matrix) response in hydrostatic, axisymmetric and plane-strain compression. Drained and undrained poroelastic parameters, including bulk modulus, Biot and Skempton coefficients, of Berea sandstone wer...
41 CitationsSource
#1Joseph F. LabuzH-Index: 32
#2Roman Y. Makhnenko (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 12
Last. J. T. Harvieux (Stanford University)H-Index: 1
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2 Citations
#1Víctor VilarrasaH-Index: 23
#2Roman Y. MakhnenkoH-Index: 12
Last. Lyesse LalouiH-Index: 52
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Geologic carbon sequestration is a promising option to reduce carbon dioxide emissions to the atmosphere and mitigate climate change. The injected CO2 will reach the storage formation at a colder temperature than that of the host rock. This cold CO2 will cool down the caprock by conduction, which will induce thermal stress reduction and pressure changes that will affect caprock stability. We analyzed thermoporomechanical response of Swiss shale and found that the effective stress changes induced...
2 CitationsSource
#1Roman Y. Makhnenko (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 12
#2Justice Harvieux (UMN: University of Minnesota)H-Index: 1
Last. Joseph F. Labuz (UMN: University of Minnesota)H-Index: 32
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The Paul-Mohr-Coulomb failure criterion includes the intermediate principal stress sigma(II) and friction angles at the limiting stress states of sigma(II)= sigma(III) and sigma(II) = sigma(I), where sigma(I) and sigma(III) are major and minor principal stresses. Conventional triaxial compression (sigma(II) = sigma(III)), extension (sigma(II) = sigma(I)), and plane strain (sigma(I) not equal sigma(II) not equal sigma(III)) experiments were performed on dry rock. The failure data were plotted in ...
16 CitationsSource