2024 Fracture tortuosity

Fracture tortuosity

Author: gcqi

August undefined, 2024

WebFragility fracture is a common medical problem associated with significant morbidity and mortality. The risk of fracture in sarcoidosis patients is high and often directly related to … WebTortuosity. Tortuosity is an intrinsic property of a porous material usually defined as the ratio of actual flow path length to the straight distance between the ends of the flow path …

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WebJan 5, 2024 · The conductivity, tortuosity, surface area and volume of fractures can be significantly enhanced by 314.4%, 5.9%, 109.0% and 53.4%, respectively, while the fracture aperture deceased by 21.8% because more small-scale fractures were activated. WebFeb 12, 2024 · As the main channel for gas migration in a reservoir, fracture length is unevenly distributed, with varying degrees of tortuosity and a complex structural distribution. The connection state of the coal pore-throat network will directly affect oil and gas recovery [ 1 , 2 , 3 ]. hoisin shrimp

Permeability enhancement through hydraulic fracturing: laboratory ...

WebOct 13, 2024 · The results showed that τ d increases as the fracture tortuosity and pore geometry complexity increases, showing good agreement with the image-based geometric tortuosity values. Moreover, the lowest τ d values were found to coincide with the preferential direction of fracture surfaces and wormhole body for a given sample, … WebPurpose: To determine the prevalence of dynamic respiratory tortuosity (DRT) of the vertebral artery ostium (VAO) as well as to evaluate its correlation with in-stent … WebSep 25, 1994 · The success of most fracture treatments is primarily dependent on the ability to evaluate the characteristics and critical mechanisms that control how a formation … hoisin spitzkohl

XFEM-based cohesive zone approach for modeling near-wellbore …

Evaluating the Influence of Fracture Roughness and Tortuosity on …

WebJul 13, 2024 · For unconventional reservoir hydraulic fracturing design, a greater fracture length is a prime factor to optimize. However, the core observation results from the Hydraulic Fracturing Test Site (HFTS) show that the propped fractures are far less or shorter than expected, which suggests that the roughness and tortuosity of hydraulic fractures are … WebSep 25, 1994 · The success of most fracture treatments is primarily dependent on the ability to evaluate the characteristics and critical mechanisms that control how a formation hydraulically fractures. ... Dramatic improvements in near-wellbore tortuosity and improvements in proppant placement can be achieved by maximizing the viscosity of … hoisin soße edekaWebDec 1, 2003 · A tortuosity factor for 3D DFNs is defined based on the proposed model, and it can account for two competing effects when the model is upscaled from individual fracture to fracture network: the ... hoisin substitute

"WebMar 10, 2015 · We thus developed and tested a modified LCL (MLCL) which takes into account local tortuosity and roughness, and works across a low range of local Reynolds Numbers. The MLCL is based on (1) modifying the aperture field by orienting it with the flow direction and (2) correcting for local roughness changes associated with local flow … " - Fracture tortuosity

Fracture tortuosity

The Effect of Tortuosity on Fluid Flow Through a Single Fracture

WebApr 12, 2024 · Results show that the variations of fracture aperture increase with the aperture and tortuosity, and the influence of tortuosity (increased by 47.97%) is greater than the aperture (increased by 4.8%). The reaction rate ratio is a logarithmic function of tortuosity and a power function of the fracture aperture.

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WebMay 1, 2024 · A modified model of the frictional resistance coefficient, considering fracture tortuosity and roughness, was established, which clearly expresses the law that with the increase in fracture ... WebSep 1, 2024 · Near-wellbore fracture tortuosity has important impacts on the productivity of fractured oil and gas wells and the injectivity of CO2 or solids disposal injectors. Previous models for simulating ...

WebMar 24, 2024 · The connectivity of the pore/fracture system is the key to CO 2 injection and CH 4 production, which is of great significance in analyzing the correlation and weight of the influencing factors affecting the connectivity on the microscale. ... The Ferret diameter is 0-10 μm. The tortuosity is 2.27111, 1.9034, 3.98522, and 3.51516, respectively ... WebOct 22, 1995 · Fracture tortuosity of arbitrarily oriented and horizontal wells is likely to cause large initiation pressures and reduction in the fracture widths. This paper presents a comprehensive study of the effects of important variables, including the principal stresses, wellbore orientation, and perforation configuration on fracture geometry. ...

WebSep 1, 2010 · Summary. A model is developed for petrophysical evaluation of naturally fractured reservoirs where dip of fractures ranges between zero and 90°, and where … WebBoth fracture apertures derived from measurements and from hypothetical analytic functions were used in a parameter study to investigate the dependence of tortuosity on …

WebMay 1, 1999 · An example of fracture tortuosity would be the initiation of longitudinal fractures from a horizontal well, as proven by the fracturing …

WebFractures are ubiquitous in geological sequences, and play an important role in the movement of fluids in the earth's crust, particularly in fields such as … hoisin substitute sauceWebJun 20, 2024 · Rock fracture mechanics is about understanding what will happen to the rocks in the subsurface when subjected to fracture stress. ... If the near-wellbore … hoisin soßeWebApr 8, 2024 · The role of disorderliness in mechanical performance for natural cellular materials has not been fully understood yet. Existing research has suggested that introducing disorderliness to periodic cellular materials can cause a reduction in stiffness, strength, ductility, and fracture toughness (Romijn and Fleck, 2007, Chen et al., 1999, … hoisin woksaus jumboWebJun 6, 2024 · A tortuosity factor for 3D DFNs is defined based on the proposed model, and it can account for two competing effects when the model is upscaled from individual fracture to fracture network: the permeability reduction induced by contact obstacles at fracture intersections and permeability enhancement induced by increasing the fracture … hoisin wokkiWebFor a single fracture, E = 1, and for multiple fractures, E = 2. The tortuosity index defines complexity of the fracture network and thus has a significant impact on the permeability. The power law formulation has led to the development of fractal pressure diffusivity equation in naturally fractured reservoirs ... hoisin sesame sauceWebOct 6, 2024 · Fractured seepage is an important factor affecting the interface stability of rock mass. It is closely related to fracture properties and hydraulic conditions. In this study, the law of seepage in a single fracture surface based on modified cubic law is described, and the three-dimensional discrete element method is used to simulate the dam foundation … hoisin woksausWebStent fracture, an incidental finding or a significant marker of clinical in-stent restenosis? ... Although the exact mechanism is unknown, factors that appear to play a negative role in SF include vessel tortuosity, use of SES and overlapping stents. Larger stent diameter was protective. Further studies are needed to better define the factors ... hoisin udon noodles