Abstract
A mathematical model is proposed that describes electrical conductivity variation in the near-well zone during drilling formations containing three immiscible phases: oil, gas, and a small amount of native salt water. It is assumed that borehole drilling is performed using a clay–water solution, the mass-exchange process between the moving mud filtrate and immovable native water is infinitely fast, and displacement of the gas phase occurs by piston flow. The redistribution of the immiscible phases is described by the conventional Buckley–Leverett equations. The electromagnetic response of the medium is interpreted using the earlier proposed method of probabilistic convolutions.
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REFERENCES
V. I. Pen'kovskii and M. I. Épov, "Some theoretical aspects of the well logging electromagnetic data refinement," Dokl. Ross. Akad. Nauk, 390, No. 5, 685-687 (2003).
M. I. Épov, V. I. Pen'kovskii, N. K. Korsakova, and I. N. Yeltsov, "Method of probabilistic convolutions for interpreting data of electromagnetic logging," J. Appl. Mech. Tech. Phys., 44, No. 6, 796-803 (2003).
I. A. Charnyi, Underground Fluid Dynamics [in Russian], Gostekhteoretizdat, Moscow (1963).
R. E. Collins, Flow of Fluids through Porous Materials, Reinhold Publishing (1961).
Yu. N. Antonov, "Isoparametric logging," Geolog. Geofiz., No. 6, 81-91 (1980).
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Korsakova, N.K., Pen'kovskii, V.I. Electromagnetic Sounding of Oil and Gas Formations. Journal of Applied Mechanics and Technical Physics 45, 828–833 (2004). https://doi.org/10.1023/B:JAMT.0000046031.20594.e7
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DOI: https://doi.org/10.1023/B:JAMT.0000046031.20594.e7