井底负压值控制是欠平衡钻井技术的基础，而井底负压值的大小与环空多相流的有关压力计算有关。
The under-balanced drilling technology is based on how to control the bottom negative pressure which is related to the pressure computation of multiphase flow in annulus .
控压钻井； 精确控制； 井底压力； 缅甸D区块；
Managed Pressure Drilling; precise control; bottom-hole pressure; Block D of Myanmar field;
要成功地进行油气井压力控制，首要条件是必须准确掌握所钻井的地层压力和地层破裂压力的分布规率。
To succeed on oil and gas Wells pressure control, first conditions must be accurate is master of drilling formation pressure and strata of failure pressure distribution rules rate.
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