Lightweight insulating oil-well cement filled with hollow glass microspheres and numerical simulation of its unsteady heat transfer process

IF 23.2 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES Advanced Composites and Hybrid Materials Pub Date : 2024-05-30 DOI:10.1007/s42114-024-00902-w

Hui Wang, Chong Ma, Yihui Yuan, Yanglei Chen, Tao Liu, Chen An, Ning Wang

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Abstract

During offshore natural gas extraction, the formation of hydrates in the wellbore poses a crucial issue that affects flow safety. There is a need to find a reliable solution to establish a wellbore with excellent thermal insulation and stability to prevent wellbore blockage. In this study, lightweight and thermally insulated (LWTI) composites with the desired mechanical strength for deep-sea natural gas development were prepared using oil-well cement (OWC) as the matrix and hollow glass microspheres (HGM) as the filler. A two-dimensional (2D) transient heat transfer mathematical model of the HGM/OWC LWTI composites was developed using the COMSOL Multiphysics software and solved using the finite element method. A transient heat transfer analysis of the HGM/OWC LWTI composites was performed. The effective thermal conductivities (k_eff) of the HGM/OWC LWTI composites were measured, and the values agreed well with the simulation results. The k_eff of the composites was approximately 0.371 W/(m·K) when the HGM (D51.8) content was 40 vol%. Compared to the traditional OWC (thermal conductivity ~ 0.889 W/(m·K)), the thermal insulation performance of the HGM/OWC LWTI composites was significantly improved. In addition, the density, mechanical properties, and water absorption of the HGM/OWC LWTI composites were investigated. The density of HGM/OWC LWTI composite material has been effectively reduced to a minimum of 1.31 g/cm³, 37% lower than that of pure cementing cement (2.08 g/cm³). The HGM/OWC LWTI composites exhibited good mechanical properties and low water absorption. This research can provide technical support for the efficient development of offshore natural gas.

Graphical abstract

Composite cementitious materials with hollow glass microspheres show excellent thermal insulation properties and engineering applicability

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填充空心玻璃微球的轻质隔热油井水泥及其非稳定传热过程的数值模拟

在海上天然气开采过程中，井筒内水合物的形成是影响流动安全的一个关键问题。需要找到一种可靠的解决方案，以建立一个具有良好隔热性和稳定性的井筒，防止井筒堵塞。本研究以油井水泥（OWC）为基体，以空心玻璃微球（HGM）为填料，制备了具有深海天然气开发所需的机械强度的轻质隔热（LWTI）复合材料。使用 COMSOL Multiphysics 软件开发了 HGM/OWC LWTI 复合材料的二维（2D）瞬态传热数学模型，并使用有限元法进行了求解。对 HGM/OWC LWTI 复合材料进行了瞬态传热分析。测量了 HGM/OWC LWTI 复合材料的有效热导率（keff），其值与模拟结果十分吻合。当 HGM（D51.8）含量为 40% 时，复合材料的 keff 约为 0.371 W/(m-K)。与传统的 OWC（导热系数约为 0.889 W/(m-K)）相比，HGM/OWC LWTI 复合材料的隔热性能显著提高。此外，还研究了 HGM/OWC LWTI 复合材料的密度、机械性能和吸水性。HGM/OWC LWTI 复合材料的密度被有效降低到最低 1.31 g/cm3，比纯水泥的密度（2.08 g/cm3）低 37%。HGM/OWC LWTI 复合材料具有良好的机械性能和低吸水性。这项研究可为海上天然气的高效开发提供技术支持。

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来源期刊

Advanced Composites and Hybrid Materials Multiple-

CiteScore

26.00

自引率

21.40%

发文量

185

期刊介绍： Advanced Composites and Hybrid Materials is a leading international journal that promotes interdisciplinary collaboration among materials scientists, engineers, chemists, biologists, and physicists working on composites, including nanocomposites. Our aim is to facilitate rapid scientific communication in this field. The journal publishes high-quality research on various aspects of composite materials, including materials design, surface and interface science/engineering, manufacturing, structure control, property design, device fabrication, and other applications. We also welcome simulation and modeling studies that are relevant to composites. Additionally, papers focusing on the relationship between fillers and the matrix are of particular interest. Our scope includes polymer, metal, and ceramic matrices, with a special emphasis on reviews and meta-analyses related to materials selection. We cover a wide range of topics, including transport properties, strategies for controlling interfaces and composition distribution, bottom-up assembly of nanocomposites, highly porous and high-density composites, electronic structure design, materials synergisms, and thermoelectric materials. Advanced Composites and Hybrid Materials follows a rigorous single-blind peer-review process to ensure the quality and integrity of the published work.