... to conduction processes. This paper builds on that work and presents laboratory data from specially designed thermal uniaxial strain testing in caprock shale material, as a validation exercise for the analytical investigation. The results of these tests are directly compared to confirm the analytical approach...

... cavern stability geologist geology reservoir characterization operation geomechanics albuquerque frequency strategic petroleum reserve natural gas storage cavern laboratory creep sierra solidmechanic geomechanics symposium variation transition sobolik new mexico cavern 1 implication...

... simulations. To address this problem, novel shell formulations have been incorporated within Los Alamos National Laboratory's implementation of the combined finite-discrete element method, called HOSS (Hybrid Optimization Software Suite). In this numerical study, these new finite element formulations...

... ABSTRACT: A direct shear test is a standard geotechnical laboratory test used to estimate the shear strength of rock fractures. This paper builds on previous work conducted by the authors to assess the extent of variation in shear strength parameters resulting from different approaches...

... energy production operations, a new coupled Thermo-Hydro-Mechanical-Chemical (THMC) framework has been developed at Los Alamos National Laboratory (LANL) since 2020. Three LANL-developed codes: HOSS, Amanzi, and dfnWorks are integrated in the LANL-developed InyanCC THMC coupling framework. The InyanCC...

... Underground Research Laboratory (URL) in Southern Switzerland in the old Bedretto Gallery is under construction for the purpose of studying the evolution of the Excavation Damage Zone (EDZ) in crystalline rocks. The new experimental tunnel will form a new branch from the existing Bedretto tunnel which...

... ABSTRACT: The concept of ‘effective stress’ is the foundation of any subsurface investigations which controls the deformation, fracture, failure, and production decline characteristics including dynamic acoustic wave propagation or specifying confining pressures in laboratory testing...

... ABSTRACT: Martin (1993) established the m-zero failure criterion following extensive field and laboratory testing at the Atomic Energy of Canada Limited Underground Research laboratory. The m-zero criterion is widely used for assessing excavations in rockmasses with a Geological Strength Index...

... challenge result national laboratory sandia national laboratory geology united states government reservoir geomechanics geological subdiscipline calibration data damage evolution laboratory numerical method purdue university challenge geometry test article participant prediction blind...

... relationships. This paper provides a comparison of field- and laboratory-derived rock mass modulus values in an effort to develop a range of likely parameters and evaluate data quality/confidence levels. The in-situ values were compared to values developed from eight commonly used empirical relationships...

... to avoid the possibility that cement could block access to fractures that are favorably oriented for shear stimulation. We have performed a benchmark in-situ test in the Bedretto underground rock laboratory in the Swiss Alps in granite at a depth below surface of 1100 m. The results show that multi-stage...

... related to the evolution of microcracks and in this study, we focused on the micromechanics of the fractures produced in crystalline rocks under time-dependent loading conditions. Stress relaxation experiments were conducted on double-flawed prismatic Barre granite specimen in the laboratory...

... ABSTRACT: This study presents complex series of laboratory permeability tests in which both steady state and pulse decay methods were applied on core samples of the weakly permeable Callovo-Oxfordian claystone from Bure (France). The focus was to explain why permeability values obtained...

... on the shale oil reservoir in the south of Songliao Basin, Jilin Province. Based on the analysis of the mineral composition, the microstructure, rock mechanics of three types of shale oil reservoirs in the laboratory, combined with the field fracturing, logging data and the in-situ stress, the fracture...

... in the laboratory is within 10%. The model has high reliability and can better reflect the elastic properties of the target reservoir. Finally, the model is used to further simulate and analyze the effects of microcracks content and aspect ratio, kerogen content and maturity on the elastic properties of rocks. 1...

... properties, a pivotal step in building geomechanical model. This paper presents the results of a laboratory study utilizing Berea and Upper Gray Berea sandstone and mudstone samples from a producing US reservoir at 75°C. A decrease in both P and S wave velocity with temperature is observed in a Berea sample...

... smaller than the loads currently applied during standard creep tests performed at the laboratory. Main conclusions are: (1) Steady state is reached after a long period (longer than 8 months). (2) Cumulated transient creep is relatively large (3) Strain rates are faster (than extrapolated from high...

... of clay-rich formations, including shales. If the inherent anisotropy of shales is not considered, model prediction errors will propagate with time and space. To limit errors, the accurate experimental laboratory measurements should be scaled up and the in-situ behavior of the caprock should be studied...

... ABSTRACT: The Bedretto Underground Laboratory for Geosciences and Geoenergies (BULGG) is located in central Switzerland and serves as a test bed for geothermal energy research. Several boreholes were drilled from the laboratory section (ca. 1.1 km overburden) to serve as injection boreholes...

... ABSTRACT: In unconventional reservoirs, the initiation and propagation of multiple fractures are strongly influenced by the type of completion (number and type of initiation points). We conducted two hydraulic fracturing experiments in a laboratory setting on two blocks with different...