页岩油钻井用环保型耐温抗盐增黏剂的制备及性能评价
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1.中国石油长庆油田分公司陇东油气开发分公司;2.渤海钻探工程有限公司油气合作开发公司;3.渤海钻探工程有限公司第一钻井公司;4.渤海钻探工程有限公司工程技术研究院

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TE254;TE39

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中国石油集团油田技术服务有限公司科技重大专项“钻完井复杂防治技术研究”(2023T-001-002)


Preparation and Performance Evaluation of Environmentally Friendly Temperature and Salt Resistant Thickener for Shale Oil Drilling
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    摘要:

    为了提高水基钻井液用增黏剂的耐温抗盐性能以及环保性能,满足页岩油钻井施工的需求,以甲基丙烯酰胺(MAA)、N-乙烯基吡咯烷酮(NVP)以及可聚合季铵盐阳离子单体(H-12)为原料,制备了一种环保型耐温抗盐增黏剂HBZ-2。室内对增黏剂HBZ-2的分子结构进行了表征,分析了其作用机理,并考察了其增黏性能、耐温抗盐性能、环保性能以及钻井液的基本性能。结果表明:在相同的实验条件下,环保型耐温抗盐增黏剂HBZ-2的增黏性能、耐温性能和抗盐性能均优于同类型增黏剂HE300和80A51。当增黏剂HBZ-2的加量为1%时,经过200℃高温老化,加入20%氯化钠或者5%氯化钙后海水基浆的黏度仍能达到30mPa·s以上,耐温抗盐性能较强。加入增黏剂HBZ-2的钻井液体系经过高温老化后的各项基本性能均较为稳定。另外,增黏剂HBZ-2的生物毒性较低,生物降解性较好,并且不含重金属,环保性能优良。研究结果认为环保型耐温抗盐增黏剂HBZ-2的性能优良,适合应用于对环保性能要求较高的海上页岩油钻井中。

    Abstract:

    In order to improve the temperature and salt resistance as well as environmental performance of water-based drilling fluid thickening agents, and meet the needs of shale oil drilling construction, an environmentally friendly temperature and salt resistant thickening agent HBZ-2 was prepared using methacrylamide (MAA), N-vinyl pyrrolidone (NVP), and polymerizable quaternary ammonium salt cationic monomer (H-12) as raw materials. The molecular structure of the thickening agent HBZ-2 was characterized indoors, its mechanism of action was analyzed, and its thickening performance, temperature and salt resistance, environmental performance, and basic performance of drilling fluid were investigated. The results showed that under the same experimental conditions, the environmentally friendly temperature and salt resistant thickening agent HBZ-2 had better thickening performance, temperature resistance, and salt resistance than the same type of thickening agents HE300 and 80A51. When the dosage of the thickening agent HBZ-2 is 1%, after high-temperature aging at 200 ℃, the viscosity of the seawater slurry can still reach over 30mPa · s after adding 20% sodium chloride or 5% calcium chloride, indicating strong temperature and salt resistance. The basic performance of the drilling fluid system with the addition of viscosity enhancer HBZ-2 after high-temperature aging is relatively stable. In addition, the viscosity enhancer HBZ-2 has low biological toxicity, good biodegradability, and does not contain heavy metals, with excellent environmental performance. The research results indicate that the environmentally friendly temperature and salt resistant thickening agent HBZ-2 has excellent performance and is suitable for application in offshore shale oil drilling wells with high environmental performance requirements.

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  • 收稿日期: 2024-09-02
  • 最后修改日期: 2024-10-17
  • 录用日期: 2024-11-05
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