Synthesis of a Novel Modified Polysiloxane Filtrate Reducer and its Application in Water-Based Drilling Fluids

IF 2.8 3区 材料科学 Q3 CHEMISTRY, PHYSICAL Silicon Pub Date : 2024-09-18 DOI:10.1007/s12633-024-03141-2
Ling Lin, Ren Ren, Yulong Bai, Hongdan Ao, Pingya Luo
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Abstract

Deep and ultra-deep oil and gas resources have considerable potential and are now the primary resources to be explored and developed. However, the formation conditions get more harsh and challenging as the drilling depth increases. At 150°C, the majority of natural polymers start to degrade thermally, whereas synthetic polymers perform exceptionally well under even higher temperatures. Based on the excellent thermal stability of polysiloxane in other research areas, a modified siloxane monomer (F-PDMS) was synthesized and copolymerized with acrylamide (AM), 2-acrylamido-2-methylpropane sulfonic acid (AMPS) and N-vinyl caprolactam (NVCL) to prepare a novel modified polysiloxane filtrate reducer (F-LS) with high-temperature resistance. The structure of products was characterized by Fourier transform infrared spectroscopy and the proton nuclear magnetic resonance, and their thermal stability was investigated using thermogravimetry. Furthermore, the rheological properties, filtration reduction, and inhibition performance of F-LS in base mud were evaluated. The results showed that after rolling at 220°C for 16 h, the API (American Petroleum Institute) filtrate loss (ambient temperature, 0.69 MPa) of 1% F-LS was only 8.8 mL, and the high-temperature (220 °C) and high-pressure (3.5 MPa) filtration was 26.8 mL, and the linear swelling rate of API filtrate liquid was dropped from 12.57% to 9.74%. Compared to Driscald and Polydrill, the effectiveness of filtrate loss reduction of F-LS was superior. The filtration control mechanism of F-LS was revealed based on the scanning electron microscopy analysis, particle size analysis, and Zeta potential test. F-LS could absorb on the clay surface and cover the pores on the surface of filter cake, and make the latter more condensed. Particularly, F-LS increased the absolute value of Zeta potential of clay particles, thus increasing their double-layer repulsion, and hydration film thickness, maintaining the proportion of submicron particles, thereby improving the stability of rheology and filtration of drilling fluids under harsh conditions.

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新型改性聚硅氧烷降滤剂的合成及其在水基钻井液中的应用
深层和超深层油气资源潜力巨大,是目前需要勘探和开发的主要资源。然而,随着钻井深度的增加,地层条件变得更加苛刻和具有挑战性。当温度达到 150°C 时,大多数天然聚合物开始热降解,而合成聚合物在更高的温度下也表现优异。基于聚硅氧烷在其他研究领域的优异热稳定性,我们合成了一种改性硅氧烷单体(F-PDMS),并将其与丙烯酰胺(AM)、2-丙烯酰胺基-2-甲基丙烷磺酸(AMPS)和 N-乙烯基己内酰胺(NVCL)共聚,制备出一种具有耐高温性能的新型改性聚硅氧烷滤液减阻剂(F-LS)。傅立叶变换红外光谱和质子核磁共振对产品的结构进行了表征,热重法对其热稳定性进行了研究。此外,还评估了 F-LS 的流变性能、降滤性能以及在基泥中的抑制性能。结果表明,1%的F-LS在220℃下滚动16小时后,API(美国石油协会)滤液损失(环境温度,0.69 MPa)仅为8.8 mL,高温(220℃)高压(3.5 MPa)过滤为26.8 mL,API滤液的线性膨胀率从12.57%降至9.74%。与 Driscald 和 Polydrill 相比,F-LS 减少滤液损失的效果更佳。通过扫描电子显微镜分析、粒度分析和 Zeta 电位测试,揭示了 F-LS 的过滤控制机理。F-LS 能吸附在粘土表面,覆盖滤饼表面的孔隙,使滤饼更加凝结。特别是 F-LS 增加了粘土颗粒 Zeta 电位的绝对值,从而增加了粘土颗粒的双层斥力和水化膜厚度,保持了亚微米颗粒的比例,从而提高了钻井液在苛刻条件下流变性和过滤的稳定性。
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来源期刊
Silicon
Silicon CHEMISTRY, PHYSICAL-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
5.90
自引率
20.60%
发文量
685
审稿时长
>12 weeks
期刊介绍: The journal Silicon is intended to serve all those involved in studying the role of silicon as an enabling element in materials science. There are no restrictions on disciplinary boundaries provided the focus is on silicon-based materials or adds significantly to the understanding of such materials. Accordingly, such contributions are welcome in the areas of inorganic and organic chemistry, physics, biology, engineering, nanoscience, environmental science, electronics and optoelectronics, and modeling and theory. Relevant silicon-based materials include, but are not limited to, semiconductors, polymers, composites, ceramics, glasses, coatings, resins, composites, small molecules, and thin films.
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