充填效率随携砂液中砾石浓度、滤失量及砾石直径的增加而降低。
The packing efficiency decreases with the increase of gravel concentration in injected liquid, fluid loss to formation and gravel size.
实验结果表明，堵塞发生在油砂界面上，而油砂界面形成的主要原因是井中砾石充填不紧实。
The experiment result showed that the plugging took place in the oil-sand interface, and the o.
黑熊在一块长满岩藻的砾石上驻足，嗅着空气中的气味。
The bear pauses on a patch of rockweed algae to sniff the air.
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