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Keywords: heterogeneity
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Proceedings Papers
Mechanical Upscaling in Highly Heterogeneous Rock Masses: Impact on Anisotropy and Subsurface Stress Prediction in the Bone Spring and Wolfcamp Formations of the Delaware Basin, USA
Available to PurchasePublisher: American Rock Mechanics Association
Paper presented at the 58th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2024
Paper Number: ARMA-2024-0473
... ABSTRACT: The unconventional Bone Spring and Wolfcamp Formations are the development focus in the Delaware Basin. However, the high heterogeneity of the reservoir rocks challenges the selection of landing zones and increases the uncertainty of well performance. Estimating faithful elastic...
Proceedings Papers
Numerical Simulation of Elastic Wavefield Evolution in Heterogeneous Fractured Media Based on a Combined Displacement Discontinuity-Discrete Fracture Network Model
Available to PurchasePublisher: American Rock Mechanics Association
Paper presented at the 58th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2024
Paper Number: ARMA-2024-0399
... ABSTRACT: The evolution of elastic waves in heterogenous fractured rocks is studied based on numerical simulations. We use the discrete fracture network method to represent the distribution of a natural fracture system and employ the displacement discontinuity method to compute the propagation...
Proceedings Papers
A 3D Continuum-Based Voronoi Tessellated Model (VTM) for Hard Rocks
Available to PurchasePublisher: American Rock Mechanics Association
Paper presented at the 58th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2024
Paper Number: ARMA-2024-0552
... of rock heterogeneities at different scales. Among these, the Voronoi structure has been successfully implemented in discontinuum models to replicate the failure process of hard rocks. More recently this method has been effectively applied in 2D continuum models; however, its suitability for simulating...
Proceedings Papers
Fracture Morphology in Glutenite Reservoirs Stimulated by Radial Borehole Fracturing
Available to PurchasePublisher: American Rock Mechanics Association
Paper presented at the 58th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2024
Paper Number: ARMA-2024-0562
... ABSTRACT: Numerous oil resources have been found in glutenite reservoirs. However, multi-stage hydraulic fracturing with horizontal wells faces the challenge of insufficient stimulation due to the pronounced heterogeneity of the reservoir. Radial borehole fracturing presents a promising...
Proceedings Papers
Investigation of Failure Mode and Permeability Evolution of Inclined Heterolithic Strata Using Coupled Discrete Element Method-Computational Fluid Dynamics Model
Available to PurchasePublisher: American Rock Mechanics Association
Paper presented at the 58th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2024
Paper Number: ARMA-2024-0658
... of mechanical constitutive behavior and permeability evolutions for rock and soil with interbedded weak beddings. 1. INTRODUCTION The subsurface heterogeneities formed during geological deposition and diagenesis is outstanding challenges in accurate and reliable geotechnical assessment and have attracted...
Proceedings Papers
New Insights for Stress Conditions of Laboratory Shear Tests
Available to PurchasePublisher: American Rock Mechanics Association
Paper presented at the 58th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2024
Paper Number: ARMA-2024-0715
... ABSTRACT: Numerous laboratory tests have been performed to investigate the shear behavior of rock discontinuities using various experimental setups. Stress heterogeneity on rock discontinuities can significantly influence the shear behavior, however, it has seldom been specified clearly...
Proceedings Papers
Fully Coupled Thermal-Hydro-Mechanical Model for ScCO2 Storage in Shale Gas Reservoirs
Available to PurchasePublisher: American Rock Mechanics Association
Paper presented at the 58th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2024
Paper Number: ARMA-2024-0819
... ABSTRACT: This study explores the potential of using supercritical CO2 (ScCO2) injection for carbon sequestration in shale gas reservoirs, focusing on the impact of structural heterogeneities on CO2 storage. This investigation presents a fully coupled thermo-hydro-mechanical (THM) analysis...
Proceedings Papers
Study on Rock Mechanics Microscopic Heterogeneity Characterization, Fracture Propagation Simulation and Frac-Ability Prediction of Complex Mode Conglomerate in Mahu Block
Available to PurchasePublisher: American Rock Mechanics Association
Paper presented at the 58th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2024
Paper Number: ARMA-2024-0754
... ABSTRACT: The conglomerate reservoir in Mahu Sag is highly heterogeneous, with an unclear understanding of fracture propagation. The reservoir contains a mix of sand, gravel, and mud. Previous studies have not fully grasped the fracture propagation patterns in conglomerate reservoirs due...
Proceedings Papers
An Innovative Combination of Scratch Test and Weibull's Statistical Fracture Theory
Available to PurchasePublisher: American Rock Mechanics Association
Paper presented at the 58th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2024
Paper Number: ARMA-2024-0035
... and sandstone, and the statistical analysis of the experimental results is carried out detailly, which further reveals the longitudinal heterogeneity of Uniaxial Compressive Strength (UCS) of the rock samples. Besides, the original tensile stress state of Weibull distribution is extended to a compressive stress...
Proceedings Papers
Laboratory Characterization of Backfill-Buffer Bentonite Blocks Under Hydration Aided by X-Ray CT
Available to PurchasePublisher: American Rock Mechanics Association
Paper presented at the 58th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2024
Paper Number: ARMA-2024-0897
... the reduction in porosity, changes in heterogeneity, and localized density variation of the samples caused by swelling. For samples with distinct particle structures, the Madogram function was employed to understand the heterogeneity patterns, while the Full Width at Half Maximum (FWHM) was utilized to analyze...
Proceedings Papers
Analysis of the Deadwood Formation in North Dakota: Applying Rock Physics
Available to PurchasePublisher: American Rock Mechanics Association
Paper presented at the 58th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2024
Paper Number: ARMA-2024-0858
... of responses. Diverse scenarios are explored, acknowledging variability and heterogeneity. Results reveal nuanced coexistence of intraparticle and interparticle porosity associated with depositional facies. This suggests intraparticle nanoporosity likely enhances permeability by increasing interconnectivity...
Proceedings Papers
Modelling Faults as Fracture Swarms to Introduce Multi-Scale Heterogeneity
Available to PurchasePublisher: American Rock Mechanics Association
Paper presented at the 58th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2024
Paper Number: ARMA-2024-0934
... as simple surfaces when considered at their full scale, a detailed view reveals a heterogeneous structure with damage zones and anastomosing fault cores. Consequently, simulations of whole fault systems can achieve reasonable results by modelling the faults as simple surfaces, but where model applications...
Proceedings Papers
Quantifying the Uncertainties of Macro- and Micro-Mechanical Measurements on Sequestration Reservoir Formations
Available to PurchasePublisher: American Rock Mechanics Association
Paper presented at the 58th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2024
Paper Number: ARMA-2024-1091
... ABSTRACT: Geomechanical properties of rocks exhibit significant variation across different measurement scales, primarily due to heterogeneity. Micro-scale geomechanical tests offer a fresh perspective, with minimal sample volume requirements, low cost, and quick measurement turnaround time...
Proceedings Papers
Thermal Damage in Crystalline Rocks: The Role of Heterogeneity in Mechanical Performance and Fracture Mechanisms
Available to PurchasePublisher: American Rock Mechanics Association
Paper presented at the 58th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2024
Paper Number: ARMA-2024-0106
... of thermal treatment on rock damage predominantly utilize intact rock specimens, either through numerical simulations or experimental approaches. This research introduces the Grain-Based model (GBM) to represent the complex shapes of mineral grains accurately and incorporates the heterogeneity of grain sizes...
Proceedings Papers
Study on Microscopic Pore-Fracture Structure of Metamorphic Buried Hill Reservoirs
Available to PurchasePublisher: American Rock Mechanics Association
Paper presented at the 58th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2024
Paper Number: ARMA-2024-0201
... ABSTRACT: The reservoir space of metamorphic buried hill reservoirs are complex and the heterogeneity is strong. It is difficult to fully characterize the micro pore and fracture structure of single resolution digital core. In this paper, multi-resolution CT and FIB-SEM scanning were performed...
Proceedings Papers
Investigation of the Effect of Confinement on Intact Wombeyan Marble Using Continuum Grain-Based Model (CGBM)
Available to PurchasePublisher: American Rock Mechanics Association
Paper presented at the 58th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2024
Paper Number: ARMA-2024-0310
... ABSTRACT: The progressive failure of brittle rock under compression involves micro-crack initiation, accumulation, and propagation. With advances in numerical modeling, it is now possible to examine complex micro-mechanical processes (e.g., strain heterogeneity, force chains, micro-level...
Proceedings Papers
Some Petrophysical Characteristics of a Brazilian Pre-Salt Carbonate
Available to PurchaseR. V. Sampaio, G. L. Righetto, R. G. S. Gomes, L. F. L. Fernandes, S. A. B. Fontoura, V. L. O. Guimarães, J. F. Bueno, B. C. Z. Honório, C. Lima, M. Naumann, C. Zhou
Publisher: American Rock Mechanics Association
Paper presented at the 57th U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2023
Paper Number: ARMA-2023-0508
... that has calcite shrubs and spherulites as the main textural components. The average porosity (13.3 %), obtained in gas permeameter-porosimeter was similar to the one obtained from thin sections, well logs, nuclear magnetic resonance, and digital rock analyses. The carbonates’ heterogeneity was manifested...
Proceedings Papers
A Three-Dimensional, Finite Element-Based Study of the Effect of Heterogeneities on Thermo-Hydro-Mechanical Deformation During Cold Fluid Injection
Available to PurchasePublisher: American Rock Mechanics Association
Paper presented at the 57th U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2023
Paper Number: ARMA-2023-0485
... ABSTRACT This paper investigates the effects of the injection of (relatively) cold CO 2 into a saline aquifer, focusing on the effects that local heterogeneities may have on the geomechanical changes observed during injection. Representative properties of the Smeaheia site, a full-scale...
Proceedings Papers
Mechanism Comparisons of Underground Hydrogen Storage in Heterogeneous Aquifers
Available to PurchasePublisher: American Rock Mechanics Association
Paper presented at the 57th U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2023
Paper Number: ARMA-2023-0519
... a horizontal well is used to perform a hydrogen storage cycle, a lower recovery factor can be obtained than a vertical well system. Meanwhile, a horizontal well system reduces hydrogen injection capacity. Alhotan et al. (2023) conduct a sensitive study on permeability heterogeneity. Iglauer (2022) optimum...
Proceedings Papers
Arrest Mechanisms of Buoyant Hydraulic Fractures
Available to PurchasePublisher: American Rock Mechanics Association
Paper presented at the 57th U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2023
Paper Number: ARMA-2023-0711
... possible if the fracture becomes contained at depth. In the absence of any heterogeneity, assuming a Newtonian fluid, an impermeable medium subjected to linear background stress, and a block injection, Möri and Lecampion (2023) have shown that the containment depends on a single, dimensionless buoyancy...
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