套管井偶极弯曲波频散向高频偏移的特性

李刚, 吕伟国, 崔志文, 马俊, 王克协, 谢荣华, 刘继生, 吕秀梅. 2018. 套管井偶极弯曲波频散向高频偏移的特性. 地球物理学报, 61(1): 379-388, doi: 10.6038/cjg2018K0248
引用本文: 李刚, 吕伟国, 崔志文, 马俊, 王克协, 谢荣华, 刘继生, 吕秀梅. 2018. 套管井偶极弯曲波频散向高频偏移的特性. 地球物理学报, 61(1): 379-388, doi: 10.6038/cjg2018K0248
LI Gang, LÜ WeiGuo, CUI ZhiWen, MA Jun, WANG KeXie, XIE RongHua, LIU JiSheng, LÜ XiuMei. 2018. Characteristics of dipole flexural wave dispersion shift to the high-frequency in cased hole. Chinese Journal of Geophysics (in Chinese), 61(1): 379-388, doi: 10.6038/cjg2018K0248
Citation: LI Gang, LÜ WeiGuo, CUI ZhiWen, MA Jun, WANG KeXie, XIE RongHua, LIU JiSheng, LÜ XiuMei. 2018. Characteristics of dipole flexural wave dispersion shift to the high-frequency in cased hole. Chinese Journal of Geophysics (in Chinese), 61(1): 379-388, doi: 10.6038/cjg2018K0248

套管井偶极弯曲波频散向高频偏移的特性

  • 基金项目:

    国家自然科学基金(11134011,41474098)资助

详细信息
    作者简介:

    李刚, 1962年生, 博士, 主要从事声波测井理论与应用方法研究

    通讯作者: 吕伟国, 1977年生, 博士, 副教授, 主要从事声波测井理论与应用方法研究.E-mail:lvwg@jlu.edu.cn; cuizw@jlu.edu.cn
  • 中图分类号: P631

Characteristics of dipole flexural wave dispersion shift to the high-frequency in cased hole

More Information
  • 对套管井偶极弯曲模式波的频散特性进行了系统的数值考察、实例对比和分析.发现套管井弯曲波频散曲线随地层横波速度的降低,特别是地层横波速度小于2000 m·s-1以下,会迅速移向高频区,偶极弯曲波基础模式主频散区(或截止频率)可出现在13 kHz以上,以致超出了现行低频偶极子声波测井仪的激发与接收频带,这是一过去没有被研究者注意到的现象,并进一步被现场实例所证实.研究表明控制套管井弯曲波频散曲线主频散区位置的主要是钢套管的厚度和地层横波速度.对地层横波速度大于井孔流体声速的快速地层,在钢套管壁厚一定(8 mm)的情况下,频散曲线主频散区可移至11 kHz以上,可能出现的最大可能频域位置是同一井孔内径,井外全钢时的频散曲线上等于、小于地层横波速度那一段,这对各种地层和套管参数都是适用的.对地层横波速度小于等于井孔流体声速(1500 m·s-1)的慢速地层,弯曲波频散曲线随地层横波速度的降低移向高频区的特点更为明显,可能移至16 kHz以上;而套管厚度的影响,也比快速地层大的多,对地层横波速度小于1380 m·s-1的慢速地层,无论用多高的频率激发,都不能在现行使用的各类套管井(壁厚6~12 mm)中用偶极声波测井仪测到弯曲模式波.

  • 加载中
  • 图 1 

    套管井断面示意图

    Figure 1. 

    The configuration of a cased hole

    图 2 

    裸眼井偶极弯曲波频散曲线

    Figure 2. 

    Dispersion curves of dipole flexural mode in an open hole

    图 3 

    套管井快、慢速地层偶极弯曲波频散曲线

    Figure 3. 

    Dispersion curves of dipole flexural mode in a cased hole

    图 4 

    地层横波速度对频散曲线的影响

    Figure 4. 

    Influence of shear wave velocity in formation on dispersion curves of flexural modes

    图 5 

    裸眼井正交偶极声波测井实测数据处理结果(慢速地层, 中国,大庆油田)

    Figure 5. 

    Dipole full waveforms (two major in-line components, up-left) from an open hole in Daqing oil field, China

    图 6 

    图 5油井,同一深度点下套管后正交偶极声波测井实测波形与数据处理结果

    Figure 6. 

    Dipole full waveforms and processing results from the same well and the same depth in Figure 5 but after casing

    图 7 

    裸眼井井径变化对弯曲波频散曲线的影响

    Figure 7. 

    Influence of well radius on dispersion curves of dipole flexural modes in an open hole

    图 8 

    快速(硬)地层套管井钢套管厚度变化对偶极弯曲波频散曲线的影响

    Figure 8. 

    Influence of pipe thickness on dispersion curves of dipole flexural modes in a cased hole for fast formation

    图 9 

    慢速(软)地层套管井钢套管厚度变化对偶极弯曲波频散曲线的影响

    Figure 9. 

    Influence of pipe thickness on dispersion curves of dipole flexural modes in a cased hole for slow formation

    表 1 

    介质参数和模型几何参数

    Table 1. 

    Parameters of media and geometry

    参数 n(层) VP/(m·s-1) VS/(m·s-1) ρ/(kg·m-3) rn-1/m rn/m
    井液 1 1500 - 1000 0.0000 0.0635
    套管 2 6098 3354 7500 0.0635 0.0715
    水泥环 3 2823 1729 1920 0.0715 0.1016
    快速地层 4 4780 2880 2490 0.1016
    慢速地层 4 2180 1460 2120 0.1016
    注:其中部分参数取自文献(Schmitt, 1988);对井液、套管、水泥环和地层,表中n分别取1、2、3和4,rn-1表示n层内界面半径,rn表示n层外界面半径.
    下载: 导出CSV
  •  

    Everhart A H, Chang S K. 1985. A theoretical study of dipole shear logging in cased holes.//SEG Technical Program. Expanded Abstracts, 72-74.

     

    He X, Hu H S. 2009. Borehole flexural modes in transversely isotropic formations:low-frequency asymptotic velocity. Geophysics, 74(4):E149-E158. doi: 10.1190/1.3141442

     

    Kimball C V. 1998. Shear slowness measurement by dispersive processing of the borehole flexural mode. Geophysics, 63(2):337-346. doi: 10.1190/1.1444333

     

    Kitsunezaki C. 1980. A new method for shear-wave logging. Geophysics, 45(10):1489-1506. doi: 10.1190/1.1441044

     

    Liu J S, Zhang B X, Wang K X. 1996. Analysis of wave components in the multipole acoustic field of the cased hole in the uniform solid formation (in Chinese). The Annual Chinese Geophysical Society.

     

    Liu J X, Cui Z W, Li G, et al. 2012. Acoustoelastic effects on flexural waves in a borehole surrounded by a transversely isotropic (VTI) elastic solid. Chinese Journal of Geophysics (in Chinese), 55(10):3485-3492, doi:10.6038/j.issn.0001-5733.2012.10.032.

     

    Ma M M, Chen H, He X, et al. 2013. The inversion of shear wave slowness's radial variations based on the dipole flexural mode dispersion. Chinese Journal of Geophysics (in Chinese), 56(6):2077-2087, doi:10.6038/cjg20130628.

     

    Schmitt D P. 1988. Shear wave logging in elastic formations. J. Acoust. Soc. Am., 84(6):2215-2229. doi: 10.1121/1.397015

     

    Tang X M, Reiter E C, Burns D R. 1995. A dispersive-wave processing technique for estimating formation shear velocity from dipole and Stoneley waveforms. Geophysics, 60(1):19-28. doi: 10.1190/1.1443747

     

    Wang K X. 2006. Numerical simulation and field examples of critically refracted shear arrivals in a borehole in soft formations.//SEG International Exposition and Seventy-Sixth Annual Meeting. SEG, 344-348.

     

    Xie F L, Lv W G, Yan S G, et al. 2014. Theoretical study on inversing the anisotropic permeability of VTI two-phase media by flexural waves in a fluid-filled borehole. Geophysics, 79(3):D161-D173. doi: 10.1190/geo2012-0456.1

     

    Zhang B X, Wang K X, Dong Q D. 1995. Theory of acoustic multipole logging and analysis of wave components and calculation of fullwaveforms for two-phase medium formation. Acta Geophysica Sinica (in Chinese), 38(S1):178-192. http://en.cnki.com.cn/Article_en/CJFDTOTAL-WLXB200308024.htm

     

    刘继生, 张碧星, 王克协. 1996. 均匀固体地层套管井中多极声场的分波分析. 中国地球物理学会年刊(西安).

     

    刘金霞, 崔志文, 李刚等. 2012.横向各向同性地层(VTI)井孔声弹效应对弯曲波的影响.地球物理学报, 55(10):3485-3492, doi:10.6038/j.issn.0001-5733.2012.10.032. http://html.rhhz.net/dqwlxb/20121032.htm

     

    马明明, 陈浩, 何晓等. 2013.基于偶极弯曲波频散的横波慢度径向分布反演.地球物理学报, 56(6):2077-2087, doi:10.6038/cjg20130628. http://html.rhhz.net/dqwlxb/20130628.htm

     

    张碧星, 王克协, 董庆德. 1995.双相介质井孔多极源声测井理论及分波分析与全波计算.地球物理学报, 38(增刊):178-192. http://cpfd.cnki.com.cn/Article/CPFDTOTAL-ZGDW199309001049.htm

  • 加载中

(9)

(1)

计量
  • 文章访问数:  333
  • PDF下载数:  459
  • 施引文献:  0
出版历程
收稿日期:  2016-08-04
修回日期:  2017-08-22
上线日期:  2018-01-05

目录