Research and application of chemical gel wall protection and plugging technology in fractured zone formation drilling
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摘要: 针对目前大洋钻探钻遇破碎带硬岩地层复杂情况,在总结国内外破碎带地层钻探施工中的主要技术难点与对策的基础上,结合现场施工中的实际情况,分析施工中经常遇到的破碎带地层特点,提出了应用化学凝胶技术解决破碎带地层井下复杂问题的新思路。提出了适用于不同地层温度的化学凝胶体系基本配方,通过正交试验设计,优选出了最佳体系配方,形成一套完善的适合深海钻探用高温树脂凝胶护壁作业规程。Abstract: In view of hard rock drilling difficulties in fracture zones during ocean drilling, and with the summary of the main technical difficulties and solutions in drilling of the fracture zone formation at home and abroad, this paper analyzes the characteristics of the fracture zone formation often encountered in the construction with regard to field cases, and proposes a new idea of applying chemical gel technology to solve complicated problems in fractured zone formation. The basic formulation of the chemical gel system suitable for different formation temperatures has been developed. Through orthogonal experimental design, a complete operation procedure for high temperature resin gel wall protection has been formed for deep-sea drilling.
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Key words:
- fracture zone formation /
- ocean drilling /
- chemical gel /
- wall protection technology /
- plugging agent
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