全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

非对称圆弧片状声源在井旁地层中产生的声场

DOI: 10.6038/cjg20140831, PP. 2732-2742

Keywords: 随钻声波测井,声波反射成像,非对称声源,圆弧片状声源

Full-Text   Cite this paper   Add to My Lib

Abstract:

提出了一种可用于随钻三维反射声波成像测井的圆弧片状声源,推导了该声源声学性质在波数-频率域内的数学描述,并利用实轴积分的方法对该声源在井旁地层中产生的声场进行求解,考察了声源的线度、频率等因素对该声源向地层中辐射的声场的影响.研究结果表明,特定尺寸和特定频率下的圆弧片状声源产生的纵波场的水平和垂直指向性图中仅具有一个明显的主瓣,且主瓣三分贝角宽较窄,方位分辨率较高,指向性良好,适用于随钻三维反射成像测井;SV波场和SH波场的指向性图中存在两个或者多个角瓣,SV波场在垂直于井轴方向上辐射的能量为0,另外在井中发射和接收的反射SH波场和SV波场会相互干扰,所以难以利用SV波场和SH波场进行三维反射声波成像;声源的线度和频率等因素对其辐射声场影响较大,考虑到激励效率和方位分辨率等因素,对于本文描述的井孔模型,选择圆周角在75°和90°之间,主频为12kHz左右的声源是合适的.

References

[1]  Che X H, Qiao W X. 2004. Acoustic field in formation generated by linear phased array transmitters in fluid-filled boreholes. Chinese J. Geophys. (in Chinese), 47(4): 731-736.
[2]  Qiao W X, Ju X D, Che X H, et al. 2011. Transducer''s and acoustic well logging technology. Physics (in Chinese), 40(2): 99-106.
[3]  Tang X M, Cheng C H. 2004. Quantitative Borehole Acoustic Methods. San Diego: Elsevier Science Publishing Co. Inc..
[4]  Tang X M, Wei Z T. 2012. Single-well acoustic reflection imaging using far-field radiation characteristics of a borehole dipole source. Chinese J. Geophys. (in Chinese), 55(8): 2798-2807.
[5]  Wang B, Tao G, Chen T R, et al. 2012. Experimental study of acoustic logging while drilling measurements using an asymmetric source. Chinese J. Geophys. (in Chinese), 55(1): 327-332.
[6]  Chen X L. 2006. Study on the foundation of three-dimension acoustic logging (in Chinese). Dongying: China University of Petroleum.
[7]  Chen X L, Wei Z T. 2012. Numerical simulation of monopole acoustic reflection imaging logging in the logging-while-drilling condition. Acta Petrolei Sinica (in Chinese), 33(5): 835-840.
[8]  Cui Z W. 2004. Theoretical and numerical study of modified Biot''s models, acoustoelectric well logging and acoustic logging while drilling excited by multipole acoustic sources (in Chinese). Changchun: Jilin University.
[9]  Lu J Q, Ju X D, Qiao W X, et al. 2011. Electronic system design of azimuthally acoustic bond tool. Well Logging Technology, 35(3): 284-287.
[10]  Market J, Deady R. 2008. Azimuthal sonic measurements: New Methods in theory and Practice. SPWLA 49th annual Logging symposium, May 25-28.
[11]  Qiao W X, Du G S, Chen X L. 2002. Feasibility of application of phased array in acoustic well-logging. Chinese J. Geophys. (in Chinese), 45(5): 714-722.
[12]  Qiao W X, Ju X D, Che X H, et al. 2006. Multipole acoustic logging transmitter structurized by annular array. Journal of China University of Petroleum (in Chinese), 30(5): 33-36.
[13]  Qiao W X, Che X H, Ju X D, et al. 2008. Acoustic logging phased arc array and its radiation directivity. Chinese J. Geophys. (in Chinese), 51(3): 939-946.
[14]  Qiao W X, Ju X D, Che X H, et al. 2011. Progress in acoustic well logging technology. Well Logging Technology (in Chinese), 35(1): 14-19.
[15]  Wang R J. 2012. Simulation research on acoustic logging in fluid-filled borehole surrounded by anisotropic formations [Ph. D. thesis](in Chinese). Beijing: China University of Petroleum.
[16]  Wang T, Dawber M, Boonen P, et al. 2011. Theory of unipole acoustic logging tools and their relevance to dipole and Quadrupole Tools for slow formation. SPE Annual Technical conference and exhibition held in Denver, Colorado, USA.
[17]  Zhang H L, Wang X M, Zhang B X. 2004. Acoustic Filed and Waves in Borehole (in Chinese). Beijing: Science Press.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133