Fracture tortuosity

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August undefined, 2024

WebApr 11, 2024 · The increase of Al content brings out the reduction of crack tip plastic zone and crack path tortuosity, which makes a significant decrease in fracture toughness. Moreover, the fracture toughness predicted based on tensile properties is in agreement with that obtained by experiment, and the fracture toughness of two alloys is dominated by ... WebMay 4, 2024 · A larger fracture complexity describes a more tortuous fracture. In porous media, tortuosity is commonly used to describe diffusion , which is defined as the arc-chord ratio: the ratio of the length of the curve to the distance between the ends of it. However, the real fractures are in three-dimensional, the whole volume and surface area of the ...

Combined Effect of Contact Area, Aperture Variation, and Fracture ...

WebThe roughness and tortuosity of fractures are essential parameters affecting the fluid flow in a jointed rock mass. This paper investigates the influence of fracture roughness and … WebJun 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 … dansko animal print clogs

Evaluating the Influence of Fracture Roughness and Tortuosity on …

WebMar 26, 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 near-wellbore fracture tortuosity usually assume fracture growth in linear-elastic media, without considering the effects of porous features of the rock. In this … 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, … 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 … اول ايام رمضان 2021

Impacts of Fracture Roughness and Near-Wellbore Tortuosity on …

Modelling the near-wellbore rock fracture tortuosity: Role of …

WebStent 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 ... WebThe technology also widens fracture openings, restricts fracture complexity, reduces near-wellbore tortuosity, and increases reservoir connectivity. The slurry can be used as a far-field diverter ... اول به دام آرم تو راWebFragility 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 … dansk klapojster mjod

"WebJun 20, 2024 · The pressure in the fracture near the wellbore is the value that must be known and analyzed to determine the width, height, and length of the fracture with either net pressure theory or P3D fracture propagation models. The near-wellbore pressure drop is composed of two parts: the perforation friction and tortuosity. " - Fracture tortuosity

Fracture tortuosity

$Two-dimensional modeling of the near-wellbore fracture tortuosity ...$

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. WebSep 1, 2009 · 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 ...

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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 21, 2024 · ABSTRACT. The complex fracture network in unconventional oil and gas reservoirs is the main channel for the fluid flow, and effective prediction of fracture …

WebThe roughness, tortuosity ratio, and maximum inclination angle of the fracture joint reduced dynamically with destruction of the joint surface and formation of gouge material, leading to a significant change in the relationship … WebJan 10, 2024 · Piedrahita and Aguilera established a dual-porosity analysis model to quantitatively calculate secondary mineralization (cementation) and tortuosity in natural fractures. If the influences of matrix, fractures, and vugs are not taken into consideration, it may lead to errors in selecting the value. Then, significant errors occur in calculating ...

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 … 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 …

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

Web@article{osti_5683507, title = {Effect of tortuosity on fluid flow through a single fracture}, author = {Tsang, Y W}, abstractNote = {Calculations to investigate the effect of path tortuosity and connectivity on fluid flow rate through a single rough fracture were carried out. The flow paths are represented by electrical resistors placed on a two-dimensional … اول ايام شهر رجب 2022 بالمغربWebFeb 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 ]. اولتراهای بارسلوناWebDec 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 … dansko beatrice pewterWebMay 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 ... dansko beatrice redWebAug 29, 2024 · Resistance to flow through the fracture may be caused by viscous drag of the fluid in the narrow openings between the two fracture surfaces, as well as the … اولتراسونیک در ایرانWebSep 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 ... اول به انگلیسی چی میشهWebNov 7, 1994 · SPE MembersAbstract. Near-wellbore tortuosity is one of many conditions that can cause additional friction pressure loss during the injection or production phase of a well. Production pressure loss reduces the potential production capacity of the well. In addition, difficulties with proppant placement are often attributed to the presence of … danskin now capri pants