纳米材料改善压裂液性能及驱油机理研究 |
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引用本文: | 刘建坤,蒋廷学,黄静,吴春方,贾文峰,陈晨. 纳米材料改善压裂液性能及驱油机理研究[J]. 石油钻探技术, 2022, 50(1): 103-111. DOI: 10.11911/syztjs.2021118 |
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作者姓名: | 刘建坤 蒋廷学 黄静 吴春方 贾文峰 陈晨 |
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作者单位: | 1.页岩油气富集机理与有效开发国家重点实验室,北京 102206 |
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基金项目: | 国家自然科学基金项目“页岩油气高效开发基础理论”(编号:51490653)、中国石化科技攻关项目“鄂南致密油藏两级裂缝高导流复合压裂技术研究”(编号:P17005-5)联合资助 |
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摘 要: | 为给研发功能性压裂液提供理论依据,在纳米尺度(50 nm)对SiO2进行C8和季铵盐(QAS)修饰,合成了疏水纳米材料SiO2-C8和疏水带电纳米材料SiO2-QAS,评价了SRFP型聚合物清洁压裂液分别加入SiO2,SiO2-C8及SiO2-QAS等3种纳米材料后的配伍性、稳定性及综合性能;利用量化模拟手段,建立了纳...
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关 键 词: | 纳米材料 清洁压裂液 驱油机理 致密砂岩 表面张力 |
收稿时间: | 2020-10-23 |
Study on Mechanism of the Fracturing Fluid Performance Improvement and Oil Displacement Using Nanomaterials |
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Affiliation: | 1.State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing, 102206, China2.Sinopec Research Institute of Petroleum Engineering, Beijing, 102206, China |
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Abstract: | To provide a theoretical basis for the development of functional fracturing fluids, SiO2 was modified with C8 and quaternary ammonium salt (QAS) on nanoscale (50 nm). The hydrophobic nanomaterial SiO2-C8 and hydrophobic charged nanomaterial SiO2-QAS were synthesized. The compatibility, stability, and comprehensive performance of the SRFP polymer clean fracturing fluid systems were evaluated as nanomaterials SiO2, SiO2-C8, and SiO2-QAS were added. Quantitative simulation methods were employed to build the adsorption structure models and adsorption kinetics models of the nanomaterials on the sandstone surface. The adsorption and oil-water separation characteristics of nanomaterials on sandstone surfaces were analyzed. The experimental and simulation results show that the three nanomaterials, SiO2, SiO2-C8, and SiO2-QAS, display favorable dispersion stability in fracturing fluids. They can effectively reduce the surface and interfacial tension and demonstrate good temperature and shear resistance. SiO2-C8 and SiO2-QAS nanomaterials are beneficial to the replacement of oil molecules on the sandstone surface and the oil-water separation when they are added into fracturing fluids. The addition of nanomaterials SiO2-C8 and SiO2-QAS can also effectively improve the performance of fracturing fluids, enhance oil displacement, and reduce oil saturation within the spread range of fracturing fluids. The research results can provide a theoretical basis for the development of functional fracturing fluids and a reference for fracturing design optimization and fracturing fluid selection for tight oil and shale oil. |
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