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2 268 360

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(51)

IPC

E21B43/27(2006-01-01)

E21B43/18(2006-01-01)

E21B43/22(2006-01-01)

(21) (22)

Application

2005103431/03, 2005-02-10

(24)

Start date

2005-02-10

(22)

Actual filing date

2005-02-10

(45)

Published

2006-01-20

(72)

Inventor

Ibragimov Nail' GabdulbarievichSharikov Gennadij NesterovichKormishin Evgenij Grigor'EvichChupikova Izida ZangirovnaTorikova Ljubov' IvanovnaRyskina Nina Zinnurovna

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo Im. V.D. Shashina

WELL BOTTOM ZONE TREATMENT METHOD Russian patent published in 2006 - IPC E21B43/27 E21B43/18 E21B43/22

Abstract RU 2268360 C1

FIELD: oil industry, particularly methods for stimulating oil production.

SUBSTANCE: method involves killing well with the use of aqueous emulsifier solution; forcing acid solution in productive formation zone with light-weight oil at rate of 24-35 m³/day and under 0.8 - 1.5 MPa pressure at tubing string head; performing technological time delay for not less than 3 hours and performing well bottom depression by swabbing thereof up to obtaining pressure of not less than 3 MPa and pH value of 6-7; lowering pumping equipment and developing well.

EFFECT: increased efficiency of well bottom zone treatment.

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RU 2 268 360 C1

Authors

Ibragimov Nail' Gabdulbarievich

Sharikov Gennadij Nesterovich

Kormishin Evgenij Grigor'Evich

Chupikova Izida Zangirovna

Torikova Ljubov' Ivanovna

Ryskina Nina Zinnurovna

Dates

2006-01-20—Published

2005-02-10—Filed