解宇宁. 可再生生物合成基钻井液体系研究[J]. 石油钻探技术, 2019, 47(6): 34-39. DOI: 10.11911/syztjs.2019097
引用本文: 解宇宁. 可再生生物合成基钻井液体系研究[J]. 石油钻探技术, 2019, 47(6): 34-39. DOI: 10.11911/syztjs.2019097
XIE Yuning. Research on Renewable Biosynthetic-Based Drilling Fluid Systems[J]. Petroleum Drilling Techniques, 2019, 47(6): 34-39. DOI: 10.11911/syztjs.2019097
Citation: XIE Yuning. Research on Renewable Biosynthetic-Based Drilling Fluid Systems[J]. Petroleum Drilling Techniques, 2019, 47(6): 34-39. DOI: 10.11911/syztjs.2019097

可再生生物合成基钻井液体系研究

Research on Renewable Biosynthetic-Based Drilling Fluid Systems

  • 摘要: 油基钻井液普遍存在基础油难以降解、不可再生等缺点,为此,利用天然生物油脂,通过催化加氢、分子异构等合成了生物合成基础油,以该基础油和改性有机土为主,通过优选其他钻井液添加剂及加量,形成了可再生生物合成基钻井液体系。生物合成基础油是C12—C24的支链异构烷烃混合物,具有优良的安全环保性和黏温特性。室内性能评价试验结果表明,可再生生物合成基钻井液体系的高温高压滤失量低于12 mL,沉降稳定性好,破乳电压在768 V以上,96 h半致死浓度大于1 000 000 mg/L,能抗20%地层水和10%劣土的侵入,岩屑滚动回收率达到98.06%,经其污染的岩心其渗透率恢复率为83.5%~92.3%。研究结果表明,生物合成基础油具有低毒环保、可降解、可再生等优点,可再生生物合成基钻井液在乳液稳定、抗污染、润滑、抑制、储层保护、安全环保等方面均表现出良好的性能,完全能满足复杂地质条件对钻井液的需求。

     

    Abstract: Oil-based drilling fluids generally have various disadvantages, for example, the base oil is difficult to degrade and non-renewable. Therefore, an investigation on the renewable biosynthesis oil-based drilling fluid system was carried out. The biosynthetic base oils were synthesized by the catalytic hydrogenation and molecular isomerization of natural bio-oils and fats. Based on the biosynthetic base oil and modified organic soil, the renewable biosynthesis-based drilling fluid system was formed through adding other drilling fluid additives and the optimized dosage, and its performance was evaluated. The biosynthetic base oil was a mixture of C12–C24 branched isoparaffins, which had excellent safety, environmental protection and viscosity-temperature properties. The high temperature and high pressure filtration loss of the renewable biosynthesis-based drilling fluid system was lower than 12 mL, the sedimentation stability was good, the demulsification voltage was up to 768 V, and the 96 h semi-lethal concentration was greater than 1 000 000 mg/L. The biosynthetic oil was able to resist the invasion of 20% formation water and 10% inferior soil, and the rolling recovery rate of cuttings reached 98.06%; the permeability recovery rate of the contaminated cores was up to 83.5%–92.3%. The research results showed that the oil with a biosynthetic base possessed the advantages of low toxicity, environmental protection, degradability and regenerability. The prepared drilling fluid exhibited good properties in emulsion stability, anti-pollution, lubrication, inhibition, reservoir protection, safety and environmental protection, which fully met the needs of drilling fluids under complex geological conditions.

     

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