RU2022121085A - A method for multi-stage acid treatment of an open wellbore in productive formations saturated with hydrocarbons with residual highly mineralized pore water - Google Patents

A method for multi-stage acid treatment of an open wellbore in productive formations saturated with hydrocarbons with residual highly mineralized pore water Download PDF

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Publication number
RU2022121085A
RU2022121085A RU2022121085A RU2022121085A RU2022121085A RU 2022121085 A RU2022121085 A RU 2022121085A RU 2022121085 A RU2022121085 A RU 2022121085A RU 2022121085 A RU2022121085 A RU 2022121085A RU 2022121085 A RU2022121085 A RU 2022121085A
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RU
Russia
Prior art keywords
hydrocarbons
acid treatment
pore water
open wellbore
acid composition
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RU2022121085A
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Russian (ru)
Inventor
Иван Иванович Рябков
Альберт Файразович Галиев
Яков Александрович Круглов
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Публичное акционерное общество "Сургутнефтегаз"
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Publication of RU2022121085A publication Critical patent/RU2022121085A/en

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Способ многоэтапной кислотной обработки открытого ствола скважины в продуктивном пласте, насыщенном углеводородами с остаточной высокоминерализованной поровой водой, включающий направленную закачку под давлением через гидромониторную насадку гидроперфоратора в обрабатываемые интервалы кислотного состава, после обработки последнего интервала производят выдержку на протекание химической реакции, извлечение продуктов реакции с последующим запуском скважины в эксплуатацию, отличающийся тем, что перед нагнетанием кислотного состава закрывают устье скважины, в обрабатываемый интервал через гидромониторную насадку, расположенную под углом 90°, изготовленную из стали с содержанием хрома 15%, направленно под давлением закачивают сначала опреснитель (техническую воду) в объеме 6-30 м3 плотностью не более 1,07 г/см3 или опреснитель (техническую воду) с добавкой поверхностно-активного вещества в концентрации 0,1-2 об.%, затем кислотный состав с добавкой поверхностно-активного вещества в количестве 1-3 об.%, после обработки последнего интервала выполняют технологическую выдержку не менее 4 ч.A method of multi-stage acid treatment of an open wellbore in a productive formation saturated with hydrocarbons with residual highly mineralized pore water, including directed injection under pressure through the jet nozzle of a hydraulic perforator into the treated intervals of acid composition, after treating the last interval, a period of time is carried out for a chemical reaction to occur, the reaction products are extracted, followed by putting the well into operation, characterized in that before injection of the acid composition the wellhead is closed, the desalination agent (process water) is first pumped into the treated interval through a jet nozzle located at an angle of 90°, made of steel with a chromium content of 15%, under pressure. volume 6-30 m 3 with a density of no more than 1.07 g/cm 3 or a desalination plant (process water) with the addition of a surfactant in a concentration of 0.1-2 vol.%, then an acid composition with the addition of a surfactant in an amount 1-3 vol.%, after processing the last interval, a technological holding period of at least 4 hours is performed.
RU2022121085A 2022-08-02 A method for multi-stage acid treatment of an open wellbore in productive formations saturated with hydrocarbons with residual highly mineralized pore water RU2022121085A (en)

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RU2022121085A true RU2022121085A (en) 2024-02-02

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