Dynamics of Saturation of a Stratum in the Zone Of Penetration of a Drilling Agent Into It.

Autor: Filippov, A. I., Zelenova, M. A., Kabirov, I. F., Levina, T. M.
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Zdroj: Journal of Engineering Physics & Thermophysics; Jan2024, Vol. 97 Issue 1, p51-62, 12p
Abstrakt: A solution of the nonlinear problem on the driving of the oil from an oil-bearing stratum of finite length by the filtrate of a drilling agent (flushing water) has been constructed with the use of the asymptotic method. On the basis of this solution, the saturation field of the stratum in the zone of penetration of the flushing water into it was investigated with regard for the process of opening of the stratum by drilling. The indicated solution defines the movement, along the thickness of the stratum, of the boundary, corresponding to the position of a drill bit, above which the saturation of the stratum with the filtrate of the flushing water and the velocity of filtering of this water are prescribed, and, below this boundary, the velocity of the water filtration flow and the stratum saturation are assumed to be equal to zero. It is shown that, within large times, the solution obtained conforms with the known Buckley–Leverett expression. On the basis of the computational experiments, spatial and time distributions of the stratum saturation in the zone of penetration of the flushing water into it have been constructed with regard for the process of opening of the stratum. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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