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| 利用钻柱振动频谱判别钻柱复杂情况的方法 |
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李春山1,2,王崇敬3,陈添2,梁宏伟2,孙卫1
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(1.西北大学 大陆动力学国家重点实验室,陕西 西安 710069;2.中国石油大学 石油工程学院,山东 青岛 266555;3.中国石油化工集团公司 西南石油局,四川 绵阳 621000)
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| 摘要: |
| 为实现钻井过程中井下钻柱运动状态以及井下复杂情况的实时监测,依据振动测试原理,结合实际钻井工况中钻柱振动特征,研制钻柱振动信号测量及处理系统。现场试验结果表明:钻柱出现黏卡、跳钻等现象后,利用快速傅里叶变换和小波变换处理方法可有效提取和识别钻柱在井下的振动特征;研制的钻柱振动采集系统可以应用于现场钻柱振动信号的采集、处理,其结果可以判断钻柱的井下工作状态。 |
| 关键词: 钻柱振动 信号处理 井下状态 实时监测 |
| DOI：10.3969/j.issn.1673-5005.2011.05.010 |
| 分类号::TE 258 |
| 文献标识码:A |
| 基金项目:中国石油化工股份有限公司项目(JP10012) |
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| Determining method for downhole drill string movement station by using drill string vibration frequency spectrum |
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LI Chun shan1,2, WANG Chong jing3, CHEN Tian2, LIANG Hong wei2, SUN Wei2
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(1.State Key Laboratory of Continental Dynamics of Northwest University, Xi 'an 710069, China;2.School of Petroleum Engineering in China University of Petroleum, Qingdao 266555, China;3.Southwest Petroleum Bureau, SINOPEC, Mianyang 621000, China)
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| Abstract: |
| For real time monitoring of drill string movement during drilling and downhole problems, based on vibrating measurement mechanism and actual drill string vibration characteristics, a new system of measurement and process of drill string vibration signal was developed. The analysis results for field data show that when stuck pipe or bit bouncing occurs the vibration characteristics of drill string can be effectively extracted and identified by the methods of Fourier transform and wavelet transform. The system can be used to gather and process drill string vibration signals, and the result of signals process can help to determine downhole working condition of drill string. |
| Key words: drill string vibration signal process downhole condition real time monitor |
