When the well reaches a pool, oil usually rises up the well because of its density difference with water beneath it or because of the pressure of expanding gas trapped above it.

当井和一个水池相接时，油通常会从井里上升，因为它与井下的水的密度不同，或者因为停留在它上方的膨胀气体的压力。

youdao

Well, there were other energy choices like oil and natural gas, right?

因为还有类似石油和天然气这种其他的资源可供选择，对吗？

youdao

Gas pressure gradually dies out, and oil is pumped from the well.

气体压力逐渐消失，石油从井里泵出。

youdao

Dresser-Rand equipment, used at nearly every stage of the oil-and-gas supply chain, is well positioned to take advantage of the global investment increase in energy infrastructure.

FORBES: Magazine Article

Control-room operators, in a mock-up of a real off-shore control room, can be trained to deal with a range of tricky situations including explosions, leaks of poisonous gas and oil-well blow-outs, without the risk of so much as a scratch.

ECONOMIST: Virtual reality

Around 20 Chinese companies are working in Myanmar on scores of projects including hydropower, mining and road-building as well as oil and gas.

ECONOMIST: China and Myanmar