Research on Manchester Coded Mud Pulse Signal Extraction

Abstract:

The mud pulse signal extracting in MWD(Measurement while drilling) was a core technology in the oil drilling developing process. In terms of the extraction and recognition problems of weak mud pulse signal in MWD, this paper analyzed the transmission format of Manchester coded down-hole datum and transmission characteristics of mud pulse signal and used morphological filtering algorithm to extract the mud pulse signal. According to the characteristics of the Manchester coded underground synchronization signal. After determining the location of the signal start time, It proposed a pattern similar waveform-recognition algorithm to detect the mud pulse signal. The field tests show that the algorithm can accurately define the mud pulse signal starting time and can effectively improve the decoding accuracy and meet the requirements of engineering applications.

• Periodical: Applied Mechanics and Materials (Volumes 519-520)
• Pages: 1144-1148
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.519-520.1144
• Online since: February 2014
• Authors: Bing Tu*, Wei Wang, Teng Xi Zhan
• Keywords: Morphological Filtering, Mud Pulse Signal, MWD, Pattern Similar

References

[1] Liu Xiushan，Sun Yinao. Scheme design of downward signaling system[J]，Acta Petrolei sinica, 2000, 21(6): 88-90.

[2] Zhang Heng, Li an-zong, Li Chuanwei, etc Signal Processing of Wireless Measurement While Drilling Based on Discrete Stationary Wavelet Transform[J].

[3] Zhao Jianhui，Wang Liyan，LiFan. An Effective Approach for the Noise Removal of Mud Pulse Telemetry System[C]. ICEMI'2007, 1: 971-973.

DOI: 10.1109/icemi.2007.4350618

[4] Zhao Jianhui, Wang Liyan, Sheng Limin, etc Anonlinear method for filtering noise and interference of pulse signal in measurement while drilling[J]. Acta Petrolei sinica, 2008, 29(4): 596-600.

[5] Tu Bing，Li Desheng，Lin Enhuai. Research on MWD mud pulse signal recognition based on Clustering Algorithm[J]. Chinese Journal of Sensors and Actuators，2012, 25(8): 1172-1176.

[6] Shen Yue. Zhu Jun. Su Yinao etc. Transmission characteristics of the drilling fluid pressure quadrature phase shift keying signal along a directional wellbore[J]. Acta Petrolei sinica. 2011. 2(32): 340-345（in Chinese）.

[7] Zheng Yi，Sun Xiaofeng，Chen Jian, etc. Extracting pulse signals in measurement while drilling using optimum denoising methods based on the ensemble empirical mode decomposition[J]. Petroleum exploration and development，2012, 39(6): 750-753.

DOI: 10.1016/s1876-3804(12)60107-4

[8] Qingjie Zhao, Baojun Zhang and Wei Wang. Data processing techniques for a wireless data transmission application via mud. EURASIP Journal on Advances in Signal Processing. 2011 1. 45.

DOI: 10.1186/1687-6180-2011-45

[9] Wei Lifang，Qi Min，Deng Lin. etc. Curve Fitting Method for Transfer Functions Based on Gradient Characteristics for Medical Volume Rendering[J]. Journal of Data Acquisition&Procssing, 2008, 23(6): 756-760.

[10] Chen Tao，Liu Yanqiong，Han Qiangqiang. Recognition Algorithm of PSK Signals Based on FPGA[J]. Journal of Data Acquisition&Procssing，2012, 27(1)：1-5.