Some drilling in man-made island 1-3,Nanpu oilfield,faces many problems,such as collision-prevention of dense cluster wells,ROP increase in basalt segments,lost circulation prevention of shallow formation and oil layer protection of highly sensitive reservoir.
冀东南堡油田1-3号人工岛钻井施工面临密集丛式井防碰,大段玄武岩层段提速,浅层防漏,强敏感储层的油层保护等问题。
参考来源 - 优快钻井技术在南堡油田1·2,447,543篇论文数据，部分数据来源于NoteExpress
The dense cluster is made up of several million stars in a volume only about 120 light-years across.
这个稠密的星团由几百万颗恒星组成，分布在约120光年的尺度上。
At the center is a dense cluster of ultra-sensitive vision cells.
中间密集着超灵敏视觉细胞。
Our solar system likely would not be so stable if it were located in a much larger, dense cluster of galaxies.
假如太阳系处于一个体积大得多、星系又密集的星系团里，太阳系就可能不会像现在这么稳定了。
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