Abstract
Cross-well EM Logging can measure the electrical characteristics of cross-well and regional formation, so as to obtain the information of oil, gas and water distribution between wells or regions. The difficulties existing in the research of Cross-well EM Logging Technology are analyzed to study the Cross-well EM receiving technology. By Comparing the characteristics of the two kinds of receiving magnetic antenna, the feedback high-sensitivity magnetic receiving antenna is introduced, the response of different antenna cores to frequency and the response of different winding modes to frequency are analyzed, and the parameters of the receiving antenna are obtained. The circuit and software processing in the receiving probe are combined with noise matching amplification, 1/F filtering, power frequency suppression, digital phase-locked amplification, phase-sensitive detection and other technologies to further improve the accuracy and sensitivity of the receiving probe. The receiving sensitivity is effectively improved to 10−7 nT; By research on high-precision time synchronization technology, the synchronization error is less than 100 ns, which can effectively carry out correlation acquisition to improve the extraction accuracy of EM phase. In order to further improve the receiving accuracy, the two spacing EM calibration method is used to eliminate the errors between the receiving circuit and the system. The cross-well EM receiving measurement experiments were carried out to verify that the cross-well EM receiving can measure electrical characteristics of formation across long spacing and double-layer metal casing wells.
Copyright 2022, IFEDC Organizing Committee.
This paper was prepared for presentation at the 2022 International Field Exploration and Devel-opment Conference in **’an, China, 16–18 November 2022.
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References
Alumbaugh, D., Morrison, H.: Theoretical and practical considerations for cross-well electromagnetic tomography assuming a cylindrical geometry. Geophysics 60(3), 846–870 (1995)
Zeng, W., Zhao, W., Zang, D.: Application research of crosshole electromagnetic tomography. Chin. J. Geophys. 44(3), 411–420(2001)
Schlumberger: Looking deep into the reservoir. Oilfield Rev. Summer 21(2), 411–419 (2009)
Zang, D., Guo, H., Chao, Y., et al.: Analysis and research on cross-well electromagnetic imaging system. Well Log. Technol. 37(2), 177–182 (2013)
Zang, D., Ji, Y., Li, Z., et al.: Numerical model matching method applied in cross-well electromagnetic imaging logging. Well Log. Technol. 39(4), 421–427 (2015)
Zang, D., Chao, Y., Li, Z., et al.: Research on the method of cross-well electromagnetic correction in metal casing. Well Log. Technol. 41(4), 383–388 (2017)
Zang, D., Chao, Y., Li, Z., et al.: Research on calibration method of cross-well electromagnetic system. Well Log. Technol. 42(3), 267–271 (2018)
Zang, D., Ji, Y., Chao, Y., et al.: A fast inverse method for long distance cross-well electromagnetic imaging logging system. Prog. Geophys. 34(6), 2369–2384 (2019)
Zang, D., Zhang, Q., Chao, Y., et al.: Applied research on synchronous measurement of transmitter and receiver of cross-well electromagnetic tomography system. Prog. Geophys. 35(4), 1631–1636 (2020)
Wu, T., Tarek, M.: Influence of steel casings on electromagnetic signal. Geophysics 60(3), 871–885 (1998)
Kim, H., Lee, K.: Electromagnetic fields in a non-uniform steel-cased borehole. Geophys. Prospect. 54(4), 433–439 (2006)
Gao, G., Alumbaugh, D., Zhang, P., Zhang, H., et al.: Practical implications of nonlinear inversion for cross-well electromagnetic data collected in cased-wells. SEG Expand. Abs. 2008(27), 299–303 (2008)
Gao, J.: Detection of Weak Signals. 3rd edn. Tsinghua University Press, Bei**g (2019)
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Chao, Ys. et al. (2023). EM Receiving Techniques of Cross-Well EM Imaging Well Logging System Research and Development. In: Lin, J. (eds) Proceedings of the International Field Exploration and Development Conference 2022. IFEDC 2022. Springer Series in Geomechanics and Geoengineering. Springer, Singapore. https://doi.org/10.1007/978-981-99-1964-2_26
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DOI: https://doi.org/10.1007/978-981-99-1964-2_26
Publisher Name: Springer, Singapore
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