钻井是地质勘探和矿床开发的一个重要环节。钻好的井对石油、天然气来说是沟通油、气层至地面形成油气生产的唯一通道，也是人们对油、气藏进行观察和施加影响的唯一通道。
论述了水井井周渗透性降低的原因，从钻井方法、冲洗液性能、建立人工过滤层、洗井等方面探讨了改善渗透性的措施。
Measures to improve perrne- ability reduction are discussed in terms of the drilling method, fluid properties, artificial infiltration layer, and well flushing, etc.
以前钻井深度只能达到1000英尺，但由于有了新的抽水方法，现在可以抽取比这更深的水。
Previous drilling of wells could only reach depths of 1,000 feet, but due to new pumping practices, water deeper than this can now be extracted.
近岸钻井似乎是一个合情合理的可以方便地得到产品的方法，但需要特殊的保卫措施。
Offshore drilling seems like a sensible way to obtain a very handy product.Extra safeguards may be needed.
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