欠平衡钻井又叫负压钻井，是指在钻井时井底压力小于地层压力，地底的流体有控制地进入井筒并且循环到地面上的钻井技术。
... 欠达到最高限度盐水钻井液unsaturated salt water drilling fluid 欠平衡钻井underbanlanced drilling 欠压实uncompaction ...
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气体钻井防斜技术特点研究.-毕业论文网 关键词 欠平衡钻井；空气钻井；井斜；钻具组合；空气锤 [gap=1859]Keywords: Underbalanced drilling; Air Drilling; Borehole deviation; BHA; Gas hammer
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Application of the underbalanced drilling technology can effectively protect the reservoir, increase the discovery and producing rate of reserves, and can solve engineering problems.
应用欠平衡钻井技术可以有效保护储层,提高储量的发现率和动用程度,解决工程难题。
参考来源 - 静态泡沫体系的稳定性研究Air and Gas drilling is one of the most important parts of under-balanced drilling techniques, which now is being used all over the world because of its benefits.
空气钻井是欠平衡钻井的重要分支。
参考来源 - 空气螺杆钻具螺杆衬套副设计研究·2,447,543篇论文数据，部分数据来源于NoteExpress
但是，欠平衡钻井技术并非适用于所有的油气藏。
But, underbalanced drilling technology is not suitable for every reservoir.
在低压储层进行欠平衡钻井时常选用气体型低密度流体。
Gas drilling fluid is often used in UBD in low pressure formation.
以优化欠平衡钻井作业为依据，提出了油气藏的筛选步骤。
Finally, it provides the screening process of reservoirs based on the optimizing underbalanced drilling technology.
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