Mechanical properties of low-density cement under shale oil in-situ conversion conditions

Li, Hailong; Pang, Xueyu; Zhang, Jian; Shi, Xian

doi:10.1016/j.conbuildmat.2023.131970

Cited by 4 publications

(2 citation statements)

References 48 publications

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“…Nanomaterials are among the additives that can be used to mitigate the settlement/sedimentation problem of the so-called "waterextended slurries". Without the use of various low-density materials, the minimum density that can be achieved for water-extended slurries is approximately 1.6 g/cm 3 [31]. During this study, all of the slurries were designed to have the same density of 1.65 g/cm 3 .…”

Section: Nanomaterialsmentioning

confidence: 99%

Influence of Various Nanomaterials on the Rheology and Hydration Kinetics of Oil Well Cement

Baragwiha,

Fikeni,

Zhao

et al. 2023

Materials

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Nanomaterials have great potential to influence the properties of cement-based materials due to their small particle size and large specific surface area. The influences of Nano-SiO2 (NS), gamma-nano-Al2O3 (GNA), alpha-nano-Al2O3 (ANA), and nano-TiO2 (NT) on the rheology and hydration kinetics of class G cement at 30 °C were investigated in this study. The nanomaterials were added in dry powder form at dosages of 1, 2, 3, 5, and 7% by weight of cement (bwoc), and their dispersion was accomplished using polycarboxylate superplasticizer (PCE) at a dosage of 1.6% bwoc. PCE provides a uniform dispersion of nanoparticles in the cement matrix, enhancing the efficiency of nanomaterials. The w/c ratio varied between 0.718 and 0.78 to form a constant-density slurry of 1.65 g/cm3. Our test results showed that NS and GNA caused significant increases in the rheology of the cement slurry, with this effect increasing with dosage, while ANA and NT tended to reduce the rheology of the slurry. Compared to a well-suspended and well-dispersed cement slurry generated by the use of PCE and diutan gum, all nanomaterials can accelerate early hydration by reducing the induction time, with GNA having the strongest influence, while NS was the only nanomaterial that further increased the long-term hydration heat release at 7 days. The stronger effect of NS and GNA on the cement slurry properties can be attributed to their higher chemical reactivity. The dosage effect on total hydration extent was relatively strong for ANA, NT, and NS from 3% to 5% but weak for GNA in the range from 3% to 7%.

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Section: Nanomaterialsmentioning

confidence: 99%

Influence of Various Nanomaterials on the Rheology and Hydration Kinetics of Oil Well Cement

Baragwiha,

Fikeni,

Zhao

et al. 2023

Materials

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“…In addition, under the action of high temperature, the porosity and permeability of cement paste will also continuously increase. This is mainly because high temperature increases the internal thermal stress of cement paste, leading to the continuous development of internal pores and the generation of micro-cracks [22][23][24][25]. From this, it can also be seen that designing and developing a high-temperature-resistant cement slurry is extremely important for ensuring the mechanical properties of cement paste at high temperatures.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Evolution Law of the Mechanical and Pore Characteristic Parameters of Set Cement under High- and Ultra-High-Temperature Treatments

Xi,

Xing,

Feng

et al. 2024

Buildings

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Cement has been widely used as a structural material in many underground projects, and these projects often face high- or ultra-high-temperature environments, leading to the deterioration of the mechanical, porosity, and permeability properties of set cement, thereby increasing the risk of instability of underground structures. In response to this, two new temperature-resistant cement slurry systems were designed. Experiments were conducted on the changes in porosity and permeability of set cement after thermal treatment using low-field nuclear magnetic resonance technology (NMR), visual studies of pore and crack development were carried out using the argon-ion polishing field emission scanning electron microscopy (FE-SEM) and computed tomography (CT) methods. The research results show that as the thermal treatment temperature continued to rise, the compressive strength first increased (25 °C–200 °C) and then decreased (200 °C–600 °C). The porosity of the set cement first decreased (25 °C–115 °C) and then increased (115 °C–600 °C), and the penetration first slowly increased (25 °C–400 °C) and then rapidly increased (400 °C–600 °C). Visualization experiments were conducted on micro-cracks and the pore distribution of the set cement under high- and ultra-high-temperatures, which proved the evolution law of these characteristic parameters. The research results have vital reference significance for the protection of the structural stability of cement components when encountering high-temperature environments.

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Influence of testing temperature and pressure on the mechanical behavior of well cementing materials

Li,

Pang,

Ghabezloo

et al. 2023

Journal of Materials Research and Technology

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Mechanical properties of low-density cement under shale oil in-situ conversion conditions

Cited by 4 publications

References 48 publications

Influence of Various Nanomaterials on the Rheology and Hydration Kinetics of Oil Well Cement

Influence of Various Nanomaterials on the Rheology and Hydration Kinetics of Oil Well Cement

Experimental Study on the Evolution Law of the Mechanical and Pore Characteristic Parameters of Set Cement under High- and Ultra-High-Temperature Treatments

Influence of testing temperature and pressure on the mechanical behavior of well cementing materials

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