西南石油大学学报(自然科学版) ›› 1999, Vol. 21 ›› Issue (2): 57-60.DOI: 10.3863/j.issn.1000-2634.1999.02.16

• 钻采工艺与设备 • 上一篇    下一篇

钻进中钻柱系统的辨识

韩继勇1   

  1. 1.西安石油学院石油工程系,西安 710065
  • 收稿日期:1998-12-25 修回日期:1900-01-01 出版日期:1999-04-20 发布日期:1999-04-20

IDENTIFICATION OF DRILL-STRING SYSTEM WHILE DRILLING

Han Ji-yong1   

  1. Xi’an Petoleum Institute
  • Received:1998-12-25 Revised:1900-01-01 Online:1999-04-20 Published:1999-04-20

摘要:

在钻井过程中,钻柱振动系统是一个很复杂的动态系统,它不仅具有复杂的不确定的边界条件,而且具有显著的随机特征。在随机信号理论基础上,提出了一种用互相关辨识钻柱系统的新方法;结合输入信号和输出信号,利用钻柱系统的脉冲响应,讨论了钻柱的临界转速、钻柱共振、钻柱与井壁之间的相互作用、所钻地层岩性等钻井工程问题。


关键词: 钻井, 地震, 相关分析, 系统辨识

Abstract:

Drill-string vibration system while is very complicated dynamic system, which has uncertain boundary conditions and randomness. Based on random signal theory, in order to quantitatively research drilling string by vibration measurement method, the article sketches out a new method——the identification of drill——string system using the cross correlation function. Using input signal, and output signal, the impulse response of drill-string is obtained. Some problems of drill engineering (critical rotation speed of frill-string, drill-string resonances, interaction between the drill string and the borehole wall and lithology of formation driied )are discussed.

Key words: drilling, seismic, correlation analysis, system identification

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