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硅酸盐通报 ›› 2025, Vol. 44 ›› Issue (1): 40-48.DOI: 10.16552/j.cnki.issn1001-1625.2024.0379

• 水泥混凝土 • 上一篇    下一篇

纳米纤丝制备及其对油井水泥浆抗水侵性能的影响

马疆1, 唐文丽2, 宋会光1, 刘开强2,3, 邓林1, 裴雪峰1, 张兴国3   

  1. 1.中国石油集团西部钻探工程有限公司工程技术研究院,克拉玛依 834000;
    2.西南石油大学新能源与材料学院,成都 610500;
    3.西南石油大学油气藏地质及开发工程全国重点实验室,成都 610500
  • 收稿日期:2024-03-28 修订日期:2024-10-11 出版日期:2025-01-15 发布日期:2025-01-23
  • 通信作者: 刘开强,博士,副教授。E-mail:kaiqiangliu@swpu.edu.cn
  • 作者简介:马 疆(1979—),男,高级工程师。主要从事固井外加剂及水泥浆体系的研究。E-mail:sasmajiang@163.com
  • 基金资助:
    国家自然科学基金青年基金(52104007);全国重点实验室开放基金(PLN2023-35)

Preparation of Nanofiber and Its Effect on Water Invasion Resistance of Oil Well Cement Paste

MA Jiang1, TANG Wenli2, SONG Huiguang1, LIU Kaiqiang2,3, DENG Lin1, PEI Xuefeng1, ZHANG Xingguo3   

  1. 1. Engineering Technology Research Institute of China Petroleum Western Drilling Engineering Co., Ltd, Karamay 834000, China;
    2. School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, China;
    3. National Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China
  • Received:2024-03-28 Revised:2024-10-11 Published:2025-01-15 Online:2025-01-23

摘要: 针对油田特高含水期原油采出率低以及聚合物抗水侵处理剂会降低水泥浆早期水化速率、降低高压含水地层固井质量的问题,以纤维素纤维为原料,结合湿式超细球磨和2,2,6,6-四甲基哌啶氧化物(TEMPO)氧化法制备纳米纤丝作为新型抗水侵处理剂,研究了纳米纤丝对水泥浆流变性、稠化时间、抗压强度以及抗水侵性能的影响。结果表明,纳米纤丝对水泥浆具有增黏以及促进水泥水化的效果。当水泥浆中纳米纤丝质量分数增至0.2%时,水泥浆流性指数由0.849降低至0.557,屈服应力由2.305 Pa增至10.061 Pa,稠化时间由260 min缩短至219 min,14 d抗压强度由26.8 MPa增至41.0 MPa。纳米纤丝通过吸附及桥接等作用提升了水泥浆内聚力,通过改变早期水化产物形核位置增加了水泥早期水化速率与抗压强度,有利于提高水泥石与地层岩石的胶结能力及固井质量。

关键词: 纳米纤丝, 油井水泥, 高含水地层, 固井, 抗水侵性能

Abstract: Aiming at the problems that the oil-recovery-efficiency of oilfield in very high water-cut stage is low and polymer water invasion resistance agents reduce the early hydration rate of cement paste and cementing quality of high-pressure water-cut stratum, this study was carried out to prepare nanofiber as a new type of water invasion resistance agent using plant cellulose fibers combining wet ultrafine ball milling and 2,2,6,6-tetramethylpiperidine oxide (TEMPO) oxidation methods. The effect of nanofiber on the rheological properties, consistency time, compressive strength and water invasion resistance of cement paste was investigated. The results show that the nanofiber have the effects of increasing viscosity and promoting early hydration of cement paste. When the mass fraction of nanofiber increases to 0.2%, the liquidity index of cement paste decreases from 0.849 to 0.557, the yield stress increases from 2.305 Pa to 10.061 Pa, the consistency time slightly reduces from 260 min to 219 min, and the 14 d compressive strength improves from 26.8 MPa to 41.0 MPa. The nanofiber could enhance the cohesion of cement paste by bridging and adsorption, and increase the hydration rate and early compressive strength of cement by changing nucleation site, which is beneficial for improving the bonding quality between cement stone and stratum rocks and cementing quality.

Key words: nanofiber, oil well cement, high water-cut stratum, cementing, water invasion resistance

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