By understanding the mechanisms of sand production, engineers can design production parameters like flow rates and drawdowns to minimize formation stress and reduce …
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Based on the time frame of sand production record, four major possible chemical reactions between reservoir sand and formation water are identified and analyzed, including …
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a, A schema for diagnosing NAFLD and NASH.Credit: Marina Corral Spence/Springer Nature. b, The panel of images from liver biopsies demonstrate the typical appearances of macrovesicular steatosis (fat), hepatocellular ballooning, lobular inflammation and pericellular fibrosis (arrows).As the disease progresses into cirrhosis (not shown), these features may also regress.
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Background Chronic and/or extreme stress in early life, often referred to as early adversity, childhood trauma, or early life stress, has been associated with a wide range of adverse effects on development. However, while early life stress has been linked to negative effects on a number of neural systems, the specific mechanisms through which early life stress influences …
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The tooth provides an excellent system for deciphering the molecular mechanisms of organogenesis, and has thus been of longstanding interest to developmental and stem cell biologists studying embryonic morphogenesis and adult tissue renewal. ... Molecular and cellular mechanisms of tooth development, homeostasis and repair Development. 2020 Jan ...
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In this paper, using the Nor-sand model, an finite difference method (FDM) simulation was carried out to study the grout efficiency and grout pressure of compaction …
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Nonalcoholic fatty liver disease (NAFLD) is emerging as the leading chronic liver disease worldwide (Loomba and al, 2013; Younossi et al., 2016).NAFLD is viewed as the hepatic manifestation of metabolic syndrome and is commonly associated with metabolic risk factors, including obesity, dyslipidemia, hypertension, and diabetes (Chalasani et al., 2018; …
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Mechanisms for sand failure include: tensile, shear, cohesive, and pore collapse. Additionally, failure due to chemical effects can occur when the cementation materials are …
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Recrystallization nucleation mechanisms were subject of contention for several years. It is now appreciated that the recrystallization nucleation mechanism differs from that characteristic of conventional phase transformations where classical nucleation theories are applicable [13].The nuclei which give rise to new recrystallized grains are believed to be …
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With the continuous development of resource scarcity and environmental pollution issues worldwide, green and clean energy is a necessity to ensure sustainable human development (Azofra et al., 2014; Pérez-Collazo et al., 2015; Zheng et al., 2018).Wind energy is a clean and pollution-free renewable energy which will dominate electricity demand growth in the …
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In skeletal muscle, decreased mitochondrial content and/or mitochondrial dysfunction led to a reduction in mitochondrial fatty acid oxidation, along with increased levels of intracellular ...
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The international 4 per 1000 initiative aims at supporting states and non-governmental stakeholders in their efforts towards a better management of soil carbon (C) stocks. These stocks depend on soil C inputs and outputs. They are the result of fine spatial scale interconnected mechanisms, which stabilise/destabilise organic matter-borne C. Since 2016, the CarboSMS …
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The development of pore water pressure plays a vital role in the evaluation of liquefaction resistance of sand. Sand in situ is typically anisotropically consolidated due to gravitational deposition and external loading. However, the influence of anisotropic consolidation stress state on the development of pore water pressure in sand has not been adequately …
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Mechanisms of NAFLD development and therapeutic strategies Nat Med. 2018 Jul;24(7):908-922. doi: 10.1038/s41591-018-0104-9. Epub 2018 Jul 2. Authors Scott L Friedman 1, Brent A Neuschwander-Tetri 2, Mary Rinella 3, Arun J al 4 Affiliations 1 …
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Representative range of ASRs observed in the texture-optimization process: (a) loose Ottawa sand seeded with dyed black sand; (b) dense Ottawa sand seeded with blue dyed sand. Standard deviation of subset pixel intensities, σ Is, and the sum of squares of subset pixel intensity gradients (SSSIG) for example subsets (48 × 48 pixels) of chosen ...
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Chemical sand stabilization has potential for desertification control and this method is characterized by its speed and convenience in operation compared with other stabilization technologies.
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A new discrete element method and computational fluid dynamics coupling model is developed by combining the resolved and unresolved method. To overcome the inaccuracy of fluid-particle drag force calculation and limitation on the size ratio of fine particles to fluid meshes, two aspects of improvements are made for sand production simulation over the existing …
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Research on sand control effect and micro-plugging mechanism of sand control medium in the development of natural gas hydrate reservoir. Author links open overlay panel Jiping Ding a b ... The research results are conducive to understanding mechanisms of sand control elements plugged by gravel during the exploitation of hydrate reservoirs and ...
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DNA modification mechanisms and gene activity during development. DNA modification mechanisms and gene activity during development Science. 1975 Jan 24;187(4173):226-32. Authors R Holliday, J E Pugh. PMID: 1111098 No …
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Substrates are used to construct the body of CWs, which play a central role in treatment process (Mlih et al., 2020).The effects of substrates (physical filtration and interception, adsorption and ion exchanges), plants and microorganisms on pollution treatment are simultaneously present in CWs (Drayer and Richter, 2016; Fu et al., 2018).The categories and …
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complete sand control and limited sand production. This book presents a comprehensive introduction of technologies applied in the development of poorly consolidated sandstone reservoirs. The contents include studies of sand production mechanisms, sand production prediction and productivity index appraisal, selection of well completion approaches,
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With the rapid development of marine engineering, calcareous sand as a primary material for island construction in the world, has become the foundation for large-scale projects and infrastructure [1], [2], [3]prehending the creep behavior of calcareous sand is crucial for guaranteeing the long-term stability of engineering facilities in land reclamation and island …
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Our East Quarter development within Golden Sands truly accentuates this residential vision, combining freestanding medium density homes, duplexes, terraced houses and smaller apartment complexes all centred around a large community reserve and adjacent to The Sands. Stages 1 and 2 are complete and homes in Stages 3 - 6 are currently underway ...
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Private Property has 212 houses, apartments, complexes, farms, land for sale in Vanderbijlpark CE. View photos, virtual tours and detailed property descriptions.
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10.1.1 Basic Process of Sand Emergence from Oil Wells. Theoretical studies have found that formation sands can be divided into two types of filling sands and skeletal sands. When the flow rate of fluid reaches a certain value, it first makes the uncemented sand particles filled in the pore channel of the formation move and the well starts to produce sand, the outflow of …
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This paper studies sand management (SMan) and its conceptual development from a geomechanical approach. This effort highlights how risk paradigms within the oil and gas industry closely influence the practice and conceptualization of SMan (Ben Mahmud, Leong and Lestariono, 2020; Mahmoudi et al., 2018).In this paper, "concept" implies a principle of action …
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A state-dependent multi-mechanism model for sands in three-dimensional space is proposed within the framework of critical-state soil mechanics. The mechanical deformation behaviour of sands is characterised with a macroscopic volumetric mechanism and a number of one-dimensional equivalent microscopic shear mechanisms (EMSMs) in various orientations. …
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Abiotic stress is the adverse effect of any abiotic factor on a plant in a given environment, impacting plants' growth and development. These stress factors, such as drought, salinity, and extreme temperatures, are often interrelated or in conjunction with each other. Plants have evolved mechanisms to sense these environmental challenges and make adjustments to …
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Sand production is a coupled fluid–solid interaction process that primarily involves two mechanisms: mechanical instabilities that lead to localized plastic behavior and failure of …
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Efficient and long-term sand production prevention and control is an important technical guarantee for the safe operation of gas storage.
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