欠平衡钻井压差确定及井底压力控制技术的应用
杨卫超
（陕西省一九四煤田地质有限公司，陕西 铜川 727000）
摘要： 欠平衡钻井技术对井下负压差的稳定性有很高的要求。而在钻井过程中，井下负压差受多种因素的影响，对
影响井下负压差的各种因素进行分析，并找到相应的对策，已成为该技术发展的关键。因此，主要针对欠平衡钻井压差
的确定进行分析，并探究了井底压力控制技术在实际工程中的应用，以期为后续钻井工作奠定重要基础。
关键词： 欠平衡；钻井压差；井底压力控制技术
中图分类号： TE242      文献标志码： A      文章编号： 2095-0802-(2023)10-0154-04
Determination of Underbalanced Drilling Pressure Difference and Application of
Bottom-hole Pressure Control Technology
YANG Weichao
(Shaanxi 194 Coalfield Geology Co., Ltd., Tongchuan 727000, Shaanxi, China)
Abstract: Underbalanced drilling technology has high requirements for the stability of downhole negative pressure difference. In
the process of drilling, the negative pressure difference is affected by many factors. To analyze the factors and find the
corresponding countermeasures has become the key to the development of the technology. Therefore, the determination of
underbalanced drilling pressure difference was analyzed, and the application of bottom-hole pressure control technology in
practical engineering was explored, in order to lay an important foundation for the follow-up drilling work.

Key words: underbalance; drilling pressure difference; bottom-hole pressure control technology