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Development and Performance Evaluation of Hydrophobically Modified Nano-Anti-Collapsing Agents for Sustainable Deepwater Shallow Drilling

Author

Listed:
  • Jintang Wang

    (State Key Laboratory of Unconventional Oil & Gas Development, China University of Petroleum (East China), Ministry of Education, Qingdao 266580, China
    School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China)

  • Zhijun He

    (State Key Laboratory of Unconventional Oil & Gas Development, China University of Petroleum (East China), Ministry of Education, Qingdao 266580, China
    School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China)

  • Haiwei Li

    (Jiangsu Gas Storage Sub-Company, PipeChina West East Gas Pipeline Company, Zhenjiang 212000, China)

  • Jian Guan

    (Qingdao NMEI Group Co., Ltd., Qingdao 266000, China)

  • Hao Xu

    (Qingdao NMEI Group Co., Ltd., Qingdao 266000, China)

  • Shuqiang Shi

    (College of Petroleum and Natural Gas Engineering, Chongqing University of Science and Technology, Chongqing 401331, China)

Abstract

Sustainable deepwater drilling for oil and gas offers significant potential. In this work, we synthesized a nanoscale collapse-prevention agent by grafting didecyldimethylammonium chloride onto spherical nano-silica and characterized it using Fourier-transform infrared spectroscopy, thermogravimetric analysis, zeta-potential, and particle-size measurements, as well as SEM and TEM. Adding 1 wt% of this agent to a bentonite slurry only marginally alters its rheology and maintains acceptable low-temperature flow properties. Microporous-membrane tests show filtrate passing through 200 nm pores drops to 55 mL, demonstrating excellent plugging. Core-immersion studies reveal that shale cores retain integrity with minimal spalling after prolonged exposure. Rolling recovery assays increase shale-cutting recovery to 68%. Wettability tests indicate the water contact angle rises from 17.1° to 90.1°, and capillary rise height falls by roughly 50%, reversing suction to repulsion. Together, these findings support a synergistic plugging–adsorption–hydrophobization mechanism that significantly enhances wellbore stability without compromising low-temperature rheology. This work may guide the design of high-performance collapse-prevention additives for safe, efficient deepwater drilling.

Suggested Citation

  • Jintang Wang & Zhijun He & Haiwei Li & Jian Guan & Hao Xu & Shuqiang Shi, 2025. "Development and Performance Evaluation of Hydrophobically Modified Nano-Anti-Collapsing Agents for Sustainable Deepwater Shallow Drilling," Sustainability, MDPI, vol. 17(15), pages 1-16, July.
    • Handle: RePEc:gam:jsusta:v:17:y:2025:i:15:p:6678-:d:1707479
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    1. Kjärstad, Jan & Johnsson, Filip, 2009. "Resources and future supply of oil," Energy Policy, Elsevier, vol. 37(2), pages 441-464, February.
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