... ABSTRACT: The scratch test is fast and reproducible, as confirmed by recent research. To evaluate the high consistency of these two methods, which is scratch and uniaxial compression, respectively, the comparison of strengths have been conducted. Scratch tests are performed on Gulong shale...

.... This study specifically addresses two primary hydrogen leakage mechanisms in caprocks: capillary leakage and faults or fractures in the caprock. We conducted static reactivity tests on various shale samples, at a constant pressure of 3.4 MPa and exposed to hydrogen in the presence of brine under different...

... ABSTRACT: Shale reservoirs are often associated with hydraulic fracturing, which involves interactions of invading fluids and shale minerals. Formation damage caused by injection impairment is a well-known challenge in the exploration and development of unconventional reservoirs. In this study...

... ABSTRACT: Shales are anisotropic, but their anisotropy is often neglected in geomechanical field applications. A major reason for this omission is the need for input data, which includes at least five different elastic parameters that are not commonly available. Recent developments have...

... oklahoma permian sequestration containment stability basin reduction shale barnett ga produced water injection strength weakening ellenberger ARMA 24 1043 Geomechanical Lessons From Oil and Gas Produced Water Injection Towards Subsurface Carbon Dioxide Sequestration Ramos, G.G. Retired BP...

... ABSTRACT: Estimating Shale Volume using conventional methods in the Bakken formation, a complex heterogeneous reservoir, is challenging due to the presence of other radioactive minerals. This study aims to evaluate the accuracy of several machine-learning algorithms in predicting shale volume...

... ABSTRACT: Shale exhibits a certain degree of anisotropy in its deformation properties. This anisotropy is important to consider in rock engineering problems. Pressuremeter (or dilatometer) testing, as an in-situ method to determine geomechanical parameters, has revealed its potential...

... ABSTRACT: This research study examines challenges of mining in the presence of shale due to its brittle nature. Shale's presence can substantially decrease the ultimate pit angle in a geological setting, reducing extraction. While earlier studies were focused on shale's impact on the slope...

...-biogeomechanical alterations in low-permeability clay-rich rock (shale) and in high permeability dolomitic rock using the EICP treatment method. We first conducted EICP treatment of shale and dolostone samples using jack bean urease enzyme over a 3-day period at a distinct temperature. Subsequently, the mechanical...

... ABSTRACT: The microcracking processes in front of the rock fracture tip could determine the macro-fracture propagation. Understanding the effect of crack-parallel stress on the microcracking processes could facilitate characterization of fracture propagation in shales and guide hydraulic...

... ABSTRACT: Geomechanical properties of clay shales significantly depend on mineralogical composition, saturation, and burial history. In this contribution, we provide insights into a unique opportunity to study the influence of burial history on geomechanical parameters of a rock unit...

... south dakota school clastic rock mudstone dakota school rock type geological subdiscipline geologist mudrock artificial intelligence imagery rapid city interaction landslide technology monitoring slope movement flight reservoir characterization shale united states bret lingwall calvin...

... ABSTRACT: Clays, mudstones and shales above CO 2 storage reservoirs are all together defining the top seal. In this paper, we evaluate the constrained modulus (M) and permeability (k) of clay sediments, mudstones and shales from the Horda Platform area, offshore Norway, where the CO 2...

... ABSTRACT: The Yingxiongling shale oil reservoir in the Qaidam Basin poses unique challenges due to its high stress differentials, steep stress gradients, abundant limy dolomite content, strong heterogeneity, and underdeveloped natural fractures. This paper conducts a comprehensive geoscience...

... monotonic loading amplitude fracture toughness strength fracture toughness experiment mechanism shale monotonically ARMA 24 487 Influence of Increasing Mean Stress on Rock Fatigue Fracture Characteristics and Failure Mechanism Yanan Hou, Li Wang. CNOOC Research Institute Ltd, Beijing, China Yishan...

... ABSTRACT: Hydraulic fracturing is important for modern gas extraction. However, the proppant embedment affects gas recovery significantly. This study investigates the impact of proppant embedment on permeability over time in shale reservoirs. The study utilized a series of experiments...

.... The shales exhibit the lowest least-stress magnitude among all lithologies, and when the shale intervals are compared to each other, the carbonate content seems to control the trend. The least-stress magnitude in sandstones is highly variable. The commonly used Eaton's equation performs relatively poorly...

... ABSTRACT: Shale exhibits significant anisotropy on both macroscopic and microscopic scales, which can influence the efficacy of the fracturing process. Existing research lacks investigations on the laws governing the variation of mechanical anisotropy at the microscopic scale relative to size...

... ABSTRACT The freezing of liquid nitrogen (LN 2 ) can affect the rock's structure, which can be used in the extraction of natural gas from deep shale formations. However, its effect on the pore structure of the shale remains unclear. To address this issue, this study subjected three different...

... ABSTRACT In this paper, we present a stochastic mean-field homogenization model for upscaling the elastic properties of shale from grain-scale to core-scale. The model encompasses several levels, from the solid clay particles to a porous organic-clay matrix to the hard silt-sized inclusions...