... 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...

... 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...

... 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...

... 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...

... 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...

... 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...

... 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...

... 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...

... 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...

... 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...

... 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...

... 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...

... 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...

... 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...

... 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...

... 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...

... 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...

... 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...

... 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...

... 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...