近钻头井下钻具运动特征及异常状态分析方法

王超; 李军; 柳贡慧; 张涛; 徐小峰

doi:10.11911/syztjs.2018026

近钻头井下钻具运动特征及异常状态分析方法

doi: 10.11911/syztjs.2018026

王超¹,
李军¹,
柳贡慧^1,2,
张涛³,
徐小峰⁴

1.
中国石油大学(北京)石油工程学院, 北京 102249;
2.
北京工业大学, 北京 100124;
3.
北京信息科技大学信息与通信工程学院, 北京 100101;
4.
中国石油冀东油田分公司钻采工艺研究院, 河北唐山 063000

基金项目:

国家自然科学基金重点项目"控压钻井测控理论及关键问题研究"（编号：51334003）、国家自然科学基金重点项目"深水油气钻采井筒压力控制基础研究"（编号：51734010）、国家科技重大专项"井下安全多测点识别与分析系统研究"（编号：2016ZX05020-003）和国家自然科学"基于模型预测控制理论与状态机架构的控压钻井压力控制方法研究"（编号：51374223）联合资助。

详细信息

作者简介:
王超(1991-),男,湖北公安人,2015年毕业于长江大学石油工程专业,在读博士研究生,主要从事油气井力学与控制方面的研究工作。

中图分类号: TE21
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出版历程
- 收稿日期: 2017-10-23
- 刊出日期: 1900-01-01

An Analytical Method for Determining the Motion Characteristics and Abnormal Conditions of Near-Bit Bottom Hole Assembly

1.
College of Petroleum Engineering, China University of Petroleum(Beijing), Beijing, 102249, China;
2.
Beijing University of Technology, Beijing, 100124, China;
3.
School of Information and Communication Engineering, Beijing Information Science and Technology University, Beijing, 100101, China;
4.
Drilling and Production Research Institute, PetroChina Jidong Oilfield Company, Tangshan, Hebei, 063000, China

摘要

摘要: 目前利用相关理论模型并结合地面录井参数分析井下钻具运动特征及异常状态的方法不够准确。基于快速傅里叶变换理论和PDC钻头牙齿受力方程，建立了井底钻具运动特征的分析方法；根据一维不稳定流动理论，结合加速度理论，建立了井底异常状态的分析方法。理论分析结果与现场试验数据吻合较好。理论分析及实测结果表明：在实测井段中，滑动钻进时井底各工程参数的频谱图中存在与螺杆转子相同转动频率的主频，旋转钻进时井底各工程参数的频谱图中存在2个主频，一个与螺杆转子的转动频率相等，另一个与钻柱的转动频率相等；井底钻具阻卡后，管内压力出现第一个压力峰值的时间是环空压力出现第一个压力谷值时间的2倍，同时扭矩及振动传感器读数变化剧烈。研究表明，利用井底工程参数频谱图的主频特征可以区分滑动钻进与旋转钻进阶段，同时可获得井底钻具及螺杆的转动状态；利用管内压力、环空压力、扭矩及加速度传感器的读数变化特征可判断井下是否出现异常。建立的分析方法可为安全快速钻井及井下专家系统的建立提供理论参考。
- 井下钻具 /
- 运动特征 /
- 异常状态 /
- 分析方法
Abstract: The performance of relevant theoretical models combined with surface mud logging parameters has unfavorable accuracy in analyzing the motion characteristics and abnormal conditions of BHA.Based on the fast Fourier transform theory and the PDC bit teeth force bearing equation,one analytical method was established for modeling the motion characteristics of BHA and according to the one-dimensional unsteady flow theory and the acceleration theory,one analytical method for bottom hole abnormal conditions was set up.The theoretical analytical results aligned well with the field test data.As shown by the theoretical analysis and the measured results,in the measuring interval,there was a dominant frequency,whose rotating frequency was the same as that of PDM in the spectrograms of engineering parameters during sliding drilling.While during rotary drilling,there were two dominant frequencies present in the spectrograms of engineering parameters,whose rotating frequencies were equal to those of PDM and drill string respectively.In case of the drilling tools bouncing on the bottom,the time of the first casing pressure peak was twice that of the first annulus pressure valley,and the torque and vibration sensor readings changed dramatically.The research demonstrated that the dominant frequency characteristics of the bottom hole engineering parameter spectrograms could be used to distinguish the sliding drilling and the rotary drilling.Meanwhile,the rotation status of BHA and PDM could be obtained.The downhole abnormal conditions could be judged based on variations of casing pressure,annulus pressure,torque and acceleration sensor readings.This analysis method could provide a theoretical reference for safe and rapid drilling and the establishment of a downhole expertise system.
- bottom hole saaembly /
- motion characteristics /
- abnormal condition /
- analytical method

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参考文献(24)

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近钻头井下钻具运动特征及异常状态分析方法

doi: 10.11911/syztjs.2018026

作者简介: 王超(1991-),男,湖北公安人,2015年毕业于长江大学石油工程专业,在读博士研究生,主要从事油气井力学与控制方面的研究工作。

计量

出版历程

An Analytical Method for Determining the Motion Characteristics and Abnormal Conditions of Near-Bit Bottom Hole Assembly

计量

出版历程

目录

作者简介:
王超(1991-),男,湖北公安人,2015年毕业于长江大学石油工程专业,在读博士研究生,主要从事油气井力学与控制方面的研究工作。