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2 302 521

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(51)

IPC

E21B43/22(2006-01-01)

C09K8/582(2006-01-01)

C12N1/20(2006-01-01)

(21) (22)

Application

2005137881/03, 2005-12-05

(24)

Start date

2005-12-05

(22)

Actual filing date

2005-12-05

(45)

Published

2007-07-10

(72)

Inventor

Gabitov Gimran KhamitovichZhdanova Natal'Ja VeniaminovnaMalets Oleg NikolaevichRamazanova Al'Fija AnvarovnaTurdymatov Anvar NigmatovichGarifullin Rashit MukhasimovichKhalikov Il'Jas Shajkhinurovich

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo Neftjanaja Kompanija

METHOD FOR OIL FIELD DEVELOPMENT Russian patent published in 2007 - IPC E21B43/22 C09K8/582 C12N1/20

Abstract RU 2302521 C1

FIELD: oil production, particularly to stimulate oil recovery by complex reservoir treatment with microorganisms and chemical reagents.

SUBSTANCE: method involves injecting aqueous biological reagent composition, namely active silt, via injection well downstream of secondary sumps of biological cleaning structure; injecting aqueous bactericide solution after 4-12 months; producing oil through production well. The aqueous composition includes active dried silt suspension of 6-15% concentration. The composition additionally has 2-14% by weight of nutrient medium, namely carbohydrate-mineral additive. 0.1-1% bactericide solution is used.

EFFECT: increased oil recovery due to improved efficiency of water-permeable flushed reservoir channels selectively blocked with biomass, increased oil displacement factor due to enhanced biochemical activity after the first stage and increased coverage of reservoir treatment due to biomass dispersion and possibility of well injectivity after well treatment with bactericide solution at the second stage.

4 ex, 2 tbl

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RU 2 302 521 C1

Authors

Gabitov Gimran Khamitovich

Zhdanova Natal'Ja Veniaminovna

Malets Oleg Nikolaevich

Ramazanova Al'Fija Anvarovna

Turdymatov Anvar Nigmatovich

Garifullin Rashit Mukhasimovich

Khalikov Il'Jas Shajkhinurovich

Dates

2007-07-10—Published

2005-12-05—Filed