与之前十年相比（1.3%），递减速度自2000年提高了一倍，达到每年2.7%。
The rate of decline has doubled to 2.7% per year since 2000, compared to the previous decade (1.3%).
为减缓原油产量递减速度、控制无效注水量，要对老井实施大量的增油降水措施。
Many measures of increasing oil mass and decreasing quantity of water are implemented to old well in order to slow down oil production decline and control ineffective water injection and production.
若油井以自然产能生产，油井产量的递减速度并不快，而是与中高渗透储集层基本相同。
If Wells produce at natural productivity, their flow rates decline with the same speed as the mid-and high-permeability reservoirs.
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