STUDY OF THE TEMPERATURE FIELDS IN OIL AND GAS STRATA 
WITH WATER INJECTION BASED ON THE PERTURBATION METHOD
A. I. Filippov , O. I. Korkeshko , and P. A. Chiganov

UDC 536.24

The problem of the thermal action on oil and gas strata 
by injection of a heating medium using expansion in a small parameter 
is reduced to an infinite sequence of boundary-value problems that 
are solved by the method of integral transforms. It is shown that, 
with an appropriate selection of the small parameter, the zeroth-order 
approximation corresponds to a space-averaged (across the stratum 
thickness) solution of the main problem and leads to a "concentrated-capacity 
scheme" that is constructed assuming that the stratum temperature 
is independent of the vertical coordinate. The first approximation 
permitted marked refinement of calculations according to the "concentrated-capacity 
scheme" and an evaluation of its error. Space-time temperature distributions 
are presented that have been calculated using the analytical solutions 
obtained.

JEPTER74920200013
JEPTER7492013