Shape Memory Screen Self-Packing Sand Control Completion Technology
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摘要:
针对独立筛管防砂完井无法支撑井壁、有效期短的问题，以及砾石充填防砂完井工艺复杂、易砂堵、费用高的不足，提出了利用一趟管柱实现长裸眼环空充填的形状记忆筛管完井技术。在优化设计形状记忆筛管机械结构的基础上，研究了形状记忆筛管生产工艺，研制了形状记忆防砂筛管，并对其性能进行了试验评价，形成了形状记忆筛管自充填防砂完井工艺。现场试验结果表明，形状记忆防砂筛管膨胀性能优越、能完全充填环空和炮眼，且膨胀后的渗透性好、挡砂精度高。形状记忆筛管自充填防砂完井技术施工工艺简单、能适应不规则井眼，具有很好的推广应用价值。
Abstract:In view of the shortcomings of stand-alone screen sand control completions, which include insufficient borehole support and short valid period, as well as the complicated process of gravel packing sand control completion, sand plugging-prone and high cost, a one-run shape memory screen completion technology was proposed to realize the long open-hole annulus packing. On the basis of optimizing the mechanical structure of shape memory screen, the production process of shape memory screen was formed, and the performance evaluation experiment of shape memory screen was conducted by utilizing the developed screen performance evaluation device, so as to form the shape memory screen self-packing sand control completion process. The results of downhole test showed that the self-packing shape memory sand control screen had superior expansion performance, and could completely fill the annulus and perforation tunnels, with good permeability and high sand retaining precision after expansion. The shape memory screen self-packing sand control completion technology is easy to operate, adapts to irregular wellbores, and is a good potential candidate for adoption in the future.
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Keywords:
- completion /
- sand control /
- screen line /
- shape memory polymer /
- self-packing /
- expanding experiment
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图 4 形状记忆筛管直井防砂完井工艺
Figure 4. Sand control completion process with shape memory screen in vertical well
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