The theoretical formulation and algorithm of solution the problem of fluid recovery separation at simultaneous development of several reservoirs together are given. As a test example the solution for the object of development, consisting of five reservoirs, is given. In the case of real multireservoir objects of development, when the parameters of each reservoir are not known for sure, the stabilizing techniques based on the fuzzy sets theory can be applied for the stability of solution.

**Key words:** simultaneous development of reservoirs, recovery separation, material balance, fuzzy sets theory, CRM.

**References **

1. Sayarpour M., *Development and application of capacitance-resistive models to water/CO2 floods*: PhD dissertation, 2008.

2. Vasil'kov Yu.V., Vasil'kova N.N., *Komp'yuternye tekhnologii vychisleniy v matematicheskom modelirovanii* (Computer technology in mathematical modeling calculations), Moscow: Finansy i statistika Publ., 2001, 256 p.

3. Gmurman V.E., *Teoriya veroyatnostey i matematicheskaya statistika* (Theory of probability and mathematical statistics), Moscow: Vysshaya shkola, 2002, 479 p.

4. Altunin A.E., Semukhin M.V., *Modeli i algoritmy prinyatiya resheniy v nechetkikh usloviyakh* (Models and algorithms for decision making in fuzzy environment), Tyumen': Tyumen State University Publ., 2002, 268 p.

5. Altunin A.E., Semukhin M.V., *Raschety v usloviyakh riska i neopredelennosti v neftegazovykh tekhnologiyakh* (Calculations in terms of risk and uncertainty in oil and gas technologies), Tyumen': Tyumen State University Publ., 2005, 220 p.

The theoretical formulation and algorithm of solution the problem of fluid recovery separation at simultaneous development of several reservoirs together are given. As a test example the solution for the object of development, consisting of five reservoirs, is given. In the case of real multireservoir objects of development, when the parameters of each reservoir are not known for sure, the stabilizing techniques based on the fuzzy sets theory can be applied for the stability of solution.

**Key words:** simultaneous development of reservoirs, recovery separation, material balance, fuzzy sets theory, CRM.

**References **

1. Sayarpour M., *Development and application of capacitance-resistive models to water/CO2 floods*: PhD dissertation, 2008.

2. Vasil'kov Yu.V., Vasil'kova N.N., *Komp'yuternye tekhnologii vychisleniy v matematicheskom modelirovanii* (Computer technology in mathematical modeling calculations), Moscow: Finansy i statistika Publ., 2001, 256 p.

3. Gmurman V.E., *Teoriya veroyatnostey i matematicheskaya statistika* (Theory of probability and mathematical statistics), Moscow: Vysshaya shkola, 2002, 479 p.

4. Altunin A.E., Semukhin M.V., *Modeli i algoritmy prinyatiya resheniy v nechetkikh usloviyakh* (Models and algorithms for decision making in fuzzy environment), Tyumen': Tyumen State University Publ., 2002, 268 p.

5. Altunin A.E., Semukhin M.V., *Raschety v usloviyakh riska i neopredelennosti v neftegazovykh tekhnologiyakh* (Calculations in terms of risk and uncertainty in oil and gas technologies), Tyumen': Tyumen State University Publ., 2005, 220 p.