... granite sample geologist united states government europe government geological subdiscipline cryogenic treatment fracture zhang ultrasonic velocity minute 20 characteristic thermal stress minute 30 minute 10 treatment time ARMA 23 0025 Investigating Effects of Cryogenic Treatment...

... shale rock type freezing rock sample reservoir characterization pore structure united states government china government ln 2 evolution clastic rock mechanism thermal stress specimen deep shale composition mudrock fracture mudstone relaxation time porosity carbonaceous shale...

...., 1986), resulting in tens of MPa of thermal stress. In addition, hundreds of times of the gas-liquid ratio of nitrogen also plays an important role in rock cracking. However, because of its high risk of vaporization, it is necessary to control the pressure in the wellbore through the safety valve, thus...

... heat transfer could cause shrinkage of the rock and exert a sharp thermal gradient that can induce numerous fractures at the surface of the formation rocks (Elwegaa et al., 2019). The significant thermal stress between LN and rock will lower fracture initiation pressure and create complex fractures(Wan...

... the working fluid to pass through the fracture network transferring heat from underground to the surface(Xie et al., 2022; Mcclure and Horne., 2014). The main difference in hydraulic fracturing of the hot dry rock and other types of reservoirs is that strong thermal stress would be induced by cold water...

... upstream oil & gas engineering hydraulic fracturing conduction problem geological subdiscipline conduction analytical solution manifold element coefficient mathematics of computing china government numerical manifold method international journal thermal stress engineering analysis...

.... That is, the efficiency of rock breaking will be improved. The findings indicate that thermal stress plays an important role in assisting the process of HDR drilling. 1. Introduction Hot dry rock is an important renewable energy resource within the overall energy mix (Feng et al., 2012; Huang et al., 2018; Lund...

... in the frozen soil provides a theory for the selection of drilling fluid temperature in the polar drilling operation. drilling fluid drilling fluids and materials Upstream Oil & Gas thermal stress mechanical property drilling fluid temperature wellbore integrity Wellbore Design numerical...

... fracture is controlled by the minimum horizontal stress principle. The key findings are expected to provide theoretical guidance for CBM development. coalbed methane fracture pattern plane hydraulic fracturing Upstream Oil & Gas thermal stress coal bed methane complex reservoir axial...

... fracturing in fractured rock. The thermal stress, rock deformation and cracking induced by temperature change are modeled by FEMM. The finite element meshfree method (FEMM) is presented to model mechanical deformation and discontinuities. With the concept of partition of unity, the accuracy of global...

... of rock sheets forming a granitic exfoliation dome in California, USA. Through a three-year field effort, we found that subcritical fracture occurred due to diurnal and seasonal cumulative thermal stresses. However, our analyses also indicate that subsequent critical fracture could only have been reached...

... towards understanding Earth surface processes. Upstream Oil & Gas outcrop thermal stress Reservoir Characterization rock erosion Rock mechanics structural geology quartzite crack length keanini eppe mechanics surface process subcritical crack growth compressive strength...

... the conductivity and permeability. For smaller pressures, the reduction of the effective stress might cause hydro-shearing of existing fractures. Moreover, injecting fluid colder than the in situ temperature will generate thermal stresses, with similar effect on the fractures. To tackle all those aspects, we...

... agust gudmundsson principal thermal stress Upstream Oil & Gas Simulation thermal stress Geothermal System HF crack natural fault propagation interaction rd principal stress geothermal reservoir natural fracture fluid pressure fracture equation ARMA 17-559 Investigating the Role...

... of transient cooling on the thermal stresses in a cooled zone. Then, we increase the number of cracks in the domain and consider interactions from multiple fractures and their propagation direction is investigated. In order to increase the accuracy of stress intensity factor calculation, the special crack tip...

... greater in magnitude than that of water-based fracturing, which shows that the energy release rate maybe sufficient for fracture branching. The expansion and thermal stresses induced by CO 2 phase change, when the fracture instability occurs, further extend the fractures or even create multi-fractures...

... indicates that thermal stresses can greatly affect initiation and propagation of fractures and assist the communication between injection pressure and pore pressure in the rock formation; thermal fracturing can be considered as an effective method to connect fracture network, enhance weak zones and create...

... Abstract: Injection of supercritical CO 2 into storage reservoirs causes thermally induced expansion and contraction inside the wellbore, potentially leading to the creation of leakage pathways. Determining a safe operating range for temperature and assessment of thermal stresses during CO...

... that elasticity modulus (Young’s modulus) and temperatures play important roles in thermal stress distribution. The results show that at 4500°C with 6MPa compressive loading elasticity modulus is the best situation for wellbore instability. By contrast, at 1500°C with a loading of 38MPa elasticity modulus...

... to tensile stresses from cooling the rock by -100 °C was greater than at higher stress regimes. This was due to the greater stress differential between the mud pressure and the stress field in the higher stress regime. The higher mud pressure counteracts the thermal stresses and thus less fractures develop...