Titanium-based nanoscale cross-linker for guar gum fracturing fluid: effects on rheological behaviour and proppant-carrying ability

Micro & nano letters

article

Chunnan Wang¹  Zifeng Zhang¹  Jing Du¹  Xiaohong Li¹  Mengyun Zhao⁴  Zhijun Zhang¹ 

[1] Engineering Research Center for Nanomaterials, He'nan University;National & Local Joint Engineering Research Center for Applied Technology of Hybrid Nanomaterials, He'nan University;Collaborative Innovation Center of Nanofunctional Materials and Applications of He'nan Province, He'nan University;Institute of Petroleum Exploration and Production

关键词: rheology;    permeability;    elastic moduli;    materials preparation;    nanocomposites;    polymer gels;    oil technology;    thermal stability;    nanostructured materials;    scanning electron microscopy;    field emission electron microscopy;    aggregation;    viscosity;    filled polymers;    surface treatment;    nanotechnology;    polymer solutions;    fracture;    rheological behaviour;    proppant-carrying ability;    guar gum fracturing fluid;    boric acid;    as-prepared Ti-NC;    thermal stability;    inter-molecular cross-linking;    intra-molecular cross-linking;    guar gum molecular chains;    cross-linked guar gum gel;    titanium-based nanoscale cross-linker;    surface-modification technology;    precursor;    Ti-based nanoscale cross-linker;    Ti-NC crosslinking guar gum gel;    field emission scanning electron microscopy;    size 6.0 nm to 13.0 nm;    TiCl4;   

DOI  :  10.1049/mnl.2018.5730

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

Ti 4+ was introduced onto the surface of 3-aminopropyltriethoxysilane (denoted as APTS; a silane coupling agent; commercial name: KH550) by surface-modification technology to afford a precursor of nanoscale cross-linker. The as-obtained precursor of nanoscale cross-linker was further transformed to a Ti-based nanoscale cross-linker (denoted as Ti-NC) by hydrolysis and condensation in association with self-aggregation. The microstructure of the Ti-NC crosslinking guar gum gel was characterised by field emission scanning electron microscopy. Moreover, the effects of the as-prepared Ti-NC on the thermal stability, rheological behaviour, and proppant-carrying ability of guar gum fracturing fluid were investigated with boric acid and TiCl 4 as the controls. Results indicate that the as-prepared Ti-NC has a sphere-like shape and a size of 6–13 nm. In the meantime, the guar gum gel cross-linked by Ti-NC exhibits better thermal stability, rheological behaviour, and proppant-carrying ability than the ones cross-linked by TiCl 4 or boric acid, which indicates that the as-prepared Ti-NC could find promising application in enhancing the oil recovery of the low-permeability reservoir. This is because Ti-NC contributes to enhancing the inter-molecular cross-linking rather than intra-molecular cross-linking of guar gum molecular chains and yielding a tight three-dimensional network structure in the cross-linked guar gum gel.

【 授权许可】

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