Published April 2022, Pg. 23-27

Section: Oil and gas field development and exploitation

UOT: 622.276.1

DOI: 10.37474/0365-8554/2022-04-23-27

Development of the formula of accurate recovery rate of hydrodynamically incomplete well by penetration degree

R.A. Guliyev PhD in Tech. Sc. - ”Absheronneft” OGPD

V.B. Khanaliyev PhD in Tech. Sc. - ”28 May” OGPD

The paper presents the methods of penetration of the productive layer. It is noted that the wells in the layers with high thickness are of plane bed and hydrodynamically incomplete by the penetration degree. The formula for an accurate oil recovery rate for such wells has not been developed so far. However, the approximate inaccurate formulas with errors, in one of which a gamma-function is used are suggested. In the reference books, this function is presented in the form of a Table (i.e. tabulated). Due to the complicacy of obtained formula in the borehole set, the solution of theoretic tasks becomes difficult. The complicated filtration flow in the lower part of the deposit in the other approximate method was considered a hemispheric-radial simple flow. 

The details of the suggested accurate formula for the oil recovery rate of the wells are provided; the plane bottom hole of the well is substituted with an incurved hemispheric surface here. The deposit is divided into two parts: plane radial simple oil flow occurs in the upper part, and hemispheric-radial simple flow in the lower part of it. 

To obtain the formula for the accurate complete oil recovery rate of this well, two different stationary hydrodynamic tasks have been solved and summarized as well.

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