ANALYSIS OF THE POSSIBILITY OF DEVELOPING VISCOUS AND HIGH-VISCOSITY OIL FIELDS THAT IS ACCOMPANIED BY ATTENDANT COMPLICATIONS WITH THE TECHNOLOGY OF CYCLIC STEAM STIMULATION OF THE BOTTOM-HOLE FORMATION ZONE

Consideration has been given to the possibility of using the technology of cyclic steam stimulation (CSS) of the bottom-hole formation zone with various attendant complications, such as the low permeability of the formation, the use of CSS in horizontal, subhorizontal, and inclined directional wells and in combination with the hydraulic fracturing of the formation, the high viscosity of oil, and the stratifi ed inhomogeneity and compartmentalization of the formation. This issue is particularly relevant in view of the ever-increasing interest of subsoil users in developing fi elds of viscous and high-viscosity oil with described complications. Using the analytical integral model that is based on thermal balance and is modifi ed for solution of the optimization problem of use of CSS on horizontal wells, the authors have calculated the optimum time intervals of implementation of all the three CSS steps. In the course of numerical experiment, the optimum number of CSS cycles was established which allows the maximum eff ect from the use of this technology on the described model formation. Also, the numerical modeling has shown that the excessively high and excessively low number of CSS cycles has a negative eff ect on the effi ciency of this technology.
Consideration has been given to the possibility of using the technology of cyclic steam stimulation (CSS) of the bottom-hole formation zone with various attendant complications, such as the low permeability of the formation, the use of CSS in horizontal, subhorizontal, and inclined directional wells and in combination with the hydraulic fracturing of the formation, the high viscosity of oil, and the stratifi ed inhomogeneity and compartmentalization of the formation. This issue is particularly relevant in view of the ever-increasing interest of subsoil users in developing fi elds of viscous and high-viscosity oil with described complications. Using the analytical integral model that is based on thermal balance and is modifi ed for solution of the optimization problem of use of CSS on horizontal wells, the authors have calculated the optimum time intervals of implementation of all the three CSS steps. In the course of numerical experiment, the optimum number of CSS cycles was established which allows the maximum eff ect from the use of this technology on the described model formation. Also, the numerical modeling has shown that the excessively high and excessively low number of CSS cycles has a negative eff ect on the effi ciency of this technology.
Author:  A. O. Fedorov, A. Ya. Gil′manov, and A. P. Shevelev
Keywords:  cyclic steam stimulation of the bottom-hole formation zone, horizontal wells, hydraulic fracturing of the formation, viscous oil, low-permeability formations, hard-to-extract oil reserves, engineering problems of production of high-viscosity oil
Page:  543