油井套管对地磁场的影响实验

doi:10.7623/syxb201303018

石油学报 ›› 2013, Vol. 34 ›› Issue (3): 540-544.DOI: 10.7623/syxb201303018

油井套管对地磁场的影响实验

管志川¹, 张苏¹, 王建云², 史玉才¹, 韦节宏³, 刘永旺¹

1. 中国石油大学石油工程学院山东青岛 266580;
2. 胜利石油管理局钻井工程技术公司山东东营 257064;
3. 胜利石油管理局渤海钻井公司山东东营 257200

收稿日期:2012-10-14 修回日期:2013-02-24 出版日期:2013-05-25 发布日期:2013-04-09
通讯作者: 张苏,男,1985年2月生,2001年获石油大学(华东)学士学位,现为中国石油大学(华东)博士研究生,主要从事井下系统信息与控制工程研究。Email:upzhangsu@126.com
作者简介:管志川,男,1959年3月生,1982年获华东石油学院学士学位,1995年获石油大学(北京)博士学位,现为中国石油大学(华东)教授、博士生导师,主要从事油气井力学、井下测控技术、深井超深井钻井和深水钻完井等方面的教学和研究工作。Email:guangzhch@upc.edu.cn
基金资助:
教育部"海洋油气钻完井理论与工程"创新团队项目(IRT1086)资助。

Experiments of the impact of casing on geomagnetic field

GUAN Zhichuan¹, ZHANG Su¹, WANG Jianyun², SHI Yucai¹, WEI Jiehong³, LIU Yongwang¹

1. College of Petroleum Engineering, China University of Petroleum, Qingdao 266580, China;
2. Drilling Engineering & Technology Company, Shengli Petroleum Administration Bureau, Dongying 257064, China;
3. Bohai Drilling Company, Shengli Petroleum Administration Bureau, Dongying 257200, China

Received:2012-10-14 Revised:2013-02-24 Online:2013-05-25 Published:2013-04-09

摘要/Abstract

摘要：

油井中的铁磁质套管受到地磁场磁化作用会产生磁化磁场,引起套管附近的地磁异常。通过对地磁异常的分析,可以判断邻井的方位。实验中利用套管在地磁环境中分别模拟了竖直井、斜井和水平井3种情况,研究了套管对地磁场所造成的影响,总结了套管对地磁场影响的规律。实验表明:邻井为斜井、水平井时,二者所引起的地磁场强度异常区域分布相似,且异常区域较大,所引起的磁工具面偏角异常分布也如此,在井的NW、SE方向磁场强度异常较大,在NE、SW方向磁工具面偏角异常较大;邻井为竖直井时,引起的磁场强度和磁工具面偏角异常区域较小,其分布与斜井、水平井不同,在南北方向磁场强度异常较大,在东西方向磁工具面偏角异常较大。通过磁场强度异常和磁工具面偏角异常的分布可判断邻井的方位。

关键词: 磁化磁场, 地磁场, 地磁异常, 套管, 磁工具面偏角

Abstract:

Affected by magnetization of the geomagnetic field, ferromagnetic casing in oil wells can form a magnetic field that results in geomagnetic anomaly in the neighborhood of casing. Thus, the orientation of adjacent wells can be determined by analyzing this geomagnetic anomaly. Through simulation experiments of the abnormal geomagnetic environment caused by casing of three different well types, i.e. vertical, inclined and horizontal wells, researched the impact of casing on the geomagnetic field and summarized regulations of local geomagnetic anomalies. Experimental results show that when adjacent wells are inclined or horizontal ones, the local geomagnetic anomaly caused by them has a similar and wider regional distribution, and anomaly of magnetic tool-face declination caused by them is distributed alike, geomagnetic field is relatively abnormal in the northwest and southeast direction of the well, while anomaly of the magnetic tool-face declination is relatively obvious in the northeast and southwest direction. When the adjacent well is a vertical one, an abnormal region of geomagnetic field and magnetic tool-face declination is relatively smaller and shows a distributional pattern different from those of inclined and horizontal wells, namely in the north-south orientation geomagnetic field is relatively abnormal, while in the east-west orientation magnetic tool-face declination is relatively abnormal. Thus, the location of adjacent wells can be determined jointly according to the abnormal distribution of both the local geomagnetic field intensity and the magnetic tool-face declination.

Key words: magnetizing magnetic field, geomagnetic field, geomagnetic anomaly, well casing, magnetic tool-face declination

中图分类号:

TE256.2

管志川, 张苏, 王建云, 史玉才, 韦节宏, 刘永旺. 油井套管对地磁场的影响实验[J]. 石油学报, 2013, 34(3): 540-544.

GUAN Zhichuan, ZHANG Su, WANG Jianyun, SHI Yucai, WEI Jiehong, LIU Yongwang. Experiments of the impact of casing on geomagnetic field[J]. Editorial office of ACTA PETROLEI SINICA, 2013, 34(3): 540-544.

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油井套管对地磁场的影响实验

Experiments of the impact of casing on geomagnetic field

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