a well that produces oil的用法和样例：
- Or a well that swallows and never spawns.
- This is an oil well that no longer produces.
- Many experiments show that: when a well produces oil from a reservoir,the porosity and permeability will decrease,as fluid pressure drops,especially for reservoirs with abnormal high pressure.
- That is an oil well that no longer produces.
- The oil workers are sinking a well.