Affiliation:
1. Trofimuk Institute of Petroleum Geology and Geophysics SB RAS
2. ROGII
Abstract
A transient electromagnetic signal is recorded in an earth formation while drilling at multiple times. Data for subsequent interpretation is transmitted via a hydrochannel with a narrow bandwidth, for that reason the amount of transmitted information is limited. Therefore, data compression is an indispensable element of processing. It is important to determine what parameters and how many of them are necessary to describe the measured EMF curve. The idea is to transfer to the surface only significant parameters allowing to restore the recorded curve with a given accuracy. The paper proposes simple and fast data compression methods based on the spline approximation of the signal. Also, an orthogonal basis in the measurement space is used to describe each signal by a linear combination of vectors from this basis. We analyze transient curves and consider various magnetic field components. Numerical experiments show how many parameters are required to describe and reconstruct the signal of a deep-reading electromagnetic tool.
Publisher
Trofimuk Institute of Petroleum Geology and Geophysics (SB RAS)
Reference18 articles.
1. Bernasconi G., Rampa V., Abramo F., Bertelli L. Compression of downhole data // SPE/IADC Drilling Conference (Amsterdam, Netherlands, March 9–11, 1999): Proceedings. – Amsterdam, 1999. – Paper SPE-52806-MS, doi: 10.2118/52806-MS.
2. Bespalov A., Rabinovich M., Tabarovsky L. Deep resistivity transient method for MWD application using asymptotic filtering // US Patent No. 7027922, publ. April 11, 2006.
3. Bulaev V.I., Munasypov R.A. Compression of the geophysical data with application of vejvlet-transformation and neural networks // Ufa State Aviation Technical University Bulletin. – 2008. – Vol. 11 (1). – P. 200–207.
4. Dutta S., Reiderman A., Schoonover L.G., Rabinovich M.B. New borehole transient electromagnetic system for reservoir monitoring // Petrophysics. – 2012. – Vol. 53 (3). – P. 222–232.
5. Guan L., Du Y. Review of the application of wavelet analysis in the petroleum industry // Canadian International Petroleum Conference (Calgary, Alberta, Canada, June 8–10, 2004): Proceedings. – Calgary, 2004. – Paper PETSOC-2004-190, doi: 10.2118/2004-190.
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