Cementy wiertnicze. Cz. 3. Plastyczne mieszanki cementu wiertniczego o zwiększonej trwałości długookresowej

• Autorzy: Bensted J.

Warianty tytułu

EN

Oilwell cement. Part 3. Ductile oilwell cement compositions for better long term durability

• Języki publikacji: PL EN

Abstrakty

PL

Plastyczne mieszanki cementowe są, coraz szerzej stosowane do cementowania odwiertów "trudnych" do wykonania i zabezpieczenia. Cementy plastyczne powinny wytrzymywać znacznie dłużej niż zwykłe cementy wiertnicze kolejne operacje po zbudowaniu odwiertu, takie jak próby ciśnieniowe, roboty perforacyjne, eksploatacja ropy lub gazu, czopowanie i likwidacja odwiertu. Projektowanie receptur na mieszanki do cementowania odwiertów na podstawie własności mechanicznych w przypadku "trudnych" odwiertów lub odcinków odwiertów jest przeprowadzane dla wyznaczonych lub prognozowanych warunków w odwiercie, tak by sprawdzić czy stwardniały cement wytrzyma skurcz i pękanie w tych warunkach. Opisano różne rodzaje oferowanych na rynku plastycznych mieszanek cementowych. Rozważono także możliwości przyszłej międzynarodowej normalizacji tych projektowanych na podstawie własności mechanicznych zestawów cementowych.

EN

Ductile cement compositions are increasingly being utilized for difficult well cementing operations, where the wells are described as critical (difficult to construct and secure). Ductile cements should last much longer than conventional oilwell cement during subsequent oil operations after construction, because of their resistance to well events, such as pressure testing, perforation, production, plug-and abandonment etc. Mechanical designs for potential well cement formulations for specific wells and well sections are simulated under determined or predicted downhole conditions, so as to check whether the hardened cements are likely to withstand shrinking and/or cracking under downhole conditions. The different types of ductile cement compositions currently available are described. Possibilities for future international standardization for these "mechanically designed" cement systems are also discussed.

Słowa kluczowe

PL

cement wiertniczy; mieszanka plastyczna; trwałość długookresowa; trwałość zwiększona; cementowanie odwiertu; mieszanka elastyczna; cement lateksowy; mieszanka spieniona; wypełniacz; cement ekspansywny; płuczka iłowa; Technika Rur Rozszerzalnych; projektowanie składu; analiza naprężeń; metoda elementów skończonych

• Wydawca: Fundacja Cement, Wapno, Beton
• Czasopismo: Cement Wapno Beton
• Rocznik: 2005
• Tom: R. 10/72, nr 1
• Strony: 13--32
• Opis fizyczny: Bibliogr. 56 poz.

Twórcy

autor

Bensted J.

• JB Consultacy, London, UK

Bibliografia

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