Control of capillary instability under hydrodynamic impact on the reservoir

• Autorzy: Panahov Geylani M. , Abbasov Eldar M. , Sultanov Babek N.

Identyfikatory

DOI

10.18668/NG.2023.02.01

Warianty tytułu

PL

Kontrola niestabilności kapilarnej w warunkach hydrodynamicznego oddziaływania na złoże

• Języki publikacji: EN

Abstrakty

EN

The paper presents the results of studies on optimisation of water impact on a reservoir by means of sequential periodic increase in hydrodynamic pressure in order to extract capillary trapped oil. The method provides a coordinated account of both displacement conditions and capacitive-filtration characteristics of fluid-saturated reservoirs. The results of experimental, theoretical and field studies of mass transfer processes in the presence of hydrodynamic nonequilibrium in heterogeneous porous media are presented. This paper considers a case where capillary forces are the determining factor for the displacement of immiscible liquids. Laboratory test results have shown that the formation of CO2 in the reaction of an alkaline solution with naphthenic components can make an additional contribution to the control of surface tension in porous media. A series of experimental studies were carried out on a core sample model to simulate the oil displacement by in-situ generated CO2 gas-liquid system. The article offers an analytical and technological solution to the problem of ensuring the value of “capillary number” and capillary penetration corresponding to the most complete extraction of trapped oil by regulating the “rate” of filtration (hydrodynamic injection pressure). The paper presents the field cases of implementing the new reservoir stimulation techniques to increase sweep efficiency. For effective residual oil recovery in fluid flow direction, conditions of stepwise (staged) maintenance of specified hydrodynamic water pressure at the boundary of injection contour are considered. Estimated calculations allow to determine time duration and stage-by-stage control of injection pressure as a requirement for reaching the expected increase in oil recovery.

PL

W artykule przedstawiono wyniki badań nad optymalizacją oddziaływania wody na złoże poprzez sekwencyjne, okresowe zwiększanie ciśnienia hydrodynamicznego w celu wydobycia kapilarnie zatrzymanej ropy. Metoda ta pozwala w sposób skoordynowany uwzględnić zarówno warunki wyporu, jak i charakterystykę kapilarno-filtracyjną złóż nasyconych cieczą. Przedstawiono wyniki badań doświadczalnych, teoretycznych i praktycznych procesów przenoszenia masy w obecności braku równowagi hydrodynamicznej w heterogenicznych ośrodkach porowatych. W artykule rozpatrywany jest przypadek, w którym siły kapilarne są czynnikiem decydującym o wypieraniu niemieszalnych cieczy. Wyniki badań laboratoryjnych wykazały, że powstawanie CO2 w reakcji roztworu zasadowego ze składnikami naftenowymi może mieć dodatkowy udział w kontroli napięcia powierzchniowego w ośrodkach porowatych. Przeprowadzono serię badań eksperymentalnych na modelu próbki rdzeniowej w celu symulacji wypierania ropy przez generowany in-situ układ gazowo-cieczowy CO2. W artykule zaproponowano analityczne i technologiczne rozwiązanie problemu zapewnienia wartości „liczby kapilarnej” i przenikania kapilarnego odpowiadających najbardziej pełnemu wydobyciu zatrzymanej ropy, poprzez regulację „szybkości” filtracji (ciśnienia zatłaczania hydrodynamicznego). W artykule przedstawiono przykłady praktycznego zastosowania nowych technik stymulacji złoża w celu zwiększenia efektywności wydobycia. W celu osiągnięcia efektywnego wydobycia ropy resztkowej w kierunku przepływu cieczy rozważono warunki stopniowego (podzielonego na etapy) utrzymywania określonego ciśnienia hydrodynamicznego wody na granicy konturu zatłaczania. Przeprowadzone obliczenia szacunkowe pozwalają na określenie czasu trwania i etapowego kontrolowania ciśnienia zatłaczania jako warunku osiągnięcia oczekiwanego wzrostu odzysku ropy.

Słowa kluczowe

EN

capillary; hydrodynamics; carbon dioxide; surface tension; sweep efficiency; oil production

PL

kapilara; hydrodynamika; dwutlenek węgla; napięcie powierzchniowe; efektywność wydobywania; produkcja ropy naftowej

• Wydawca: Instytut Nafty i Gazu - Państwowy Instytut Badawczy
• Czasopismo: Nafta-Gaz
• Rocznik: 2023
• Tom: R. 79, nr 2
• Strony: 71--83
• Opis fizyczny: Bibliogr. 45 poz.

Twórcy

autor

Panahov Geylani M.

• Institute of Mathematics and Mechanics of Azerbaijan National Academy of Sciences

autor

Abbasov Eldar M.

• Institute of Mathematics and Mechanics of Azerbaijan National Academy of Sciences

autor

Sultanov Babek N.

• Institute of Geology and Geophysics of Azerbaijan National Academy of Sciences

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Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).