Scientific and technical journal

«Equipment and technologies for oil and gas complex»

ISSN 1999-6934

Equipment and technologies for oil and gas complex
USE OF PSEUDO-PLASTIC POLYMER SYSTEM AT THE ZHALGIZTOBE FIELD

UDC: 622.276.64
DOI: 10.33285/1999-6934-2021-6(126)-46-51

Authors:

KADET VALERY V.1,
KHAVKIN ALEXANDER YA.1,
IMANBAEV BAKYT A.2

1 National University of Oil and Gas "Gubkin University", Moscow, Russian Federation
2 KazNIPImunaigas

Keywords: pseudo-plastic system, flow rate, water flooding, displacement characteristic

Annotation:

The results of pilot work on the pumping of Russian pseudo-plastic polymer system to increase oil production rates and reduce water-flooding in the Zhalgiztobe layered inhomogeneous oil field (Republic of Kazakhstan), the oil viscosity of which is 846 MPa and wells oil flow – 1,3 t/day and high water flooding of 80...90 %, conducted in December 2019, are presented. To substantiate the technology, laboratory experiments were carried out, which allowed choosing the concentration and volumes of the reagent fractional slug – 5,3 tons of the dry reagent was injected during the pilot operation. Efficiency evaluation by the method of displacement characteristics showed a technological effect for 21 months after the pilot operation in the amount of more than 2000 tons of additionally produced oil (increase in oil production rates made 45 %) with a decrease in water flooding by 2 %. The technological effect amounted to more than 400 tons of additionally produced oil per 1 ton of the injected dry reagent. In accordance with the mechanism of waterproofing polymer technologies, the total technological effect is expected to be even greater. Since more than 5 % of oil reserves in the Russian Federation belong to the category of high viscosity oils, the experience of using the Russian pseudo-plastic polymer system to increase oil production rates and reduce water flooding at such facilities is very important for the Russian Federation.

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