起初进入油井、本应被密封在油井底部和侧壁的天然气有多少，同样也不清楚。

It's also unclear how natural gas first made its way into the well, which was supposed to be sealed on the sides and bottom.

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油层内及油井底结垢是大庆油田三元复合驱现场试验过程中须解决的一个重大问题。

The scale deposit in oil strata and bottom of oil Wells is a great trouble in situ tests of alkaline-surfactant-polymer (ASP) flooding area of Daqing Oilfield.

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最后一个步骤计划通过减压井从油井底部注入泥浆和水泥。这可能在本月晚些时候进行。

As a final step there are plans to pump in mud and cement from below through relief Wells. That could happen later this month.

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