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.

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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.

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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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