TECHICAL Series MATHEMATICS • INFORMATICS • PHYSICS Series PHILOLOGY Series ECONOMIC SCIENCES Sereies EDUCATIONAL SCIENCES Series LAW AND SOCIAL SCIENCES Series
The Phenomenology of the Autogenous Contraction which is Manifesting During and after the Hardening of the Slurries Used to Well Cementation
(Universitatea Petrol ? Gaze din Ploiesti, Bd. Bucureşti, 39, Ploieşti e-mail:ghemih@yahoo.com)
Vol LX • No. 4/2008
Mihai Gheorghitoiu
Universitatea Petrol ? Gaze din Ploiesti, Bd. Bucureşti, 39, Ploieşti
e-mail:ghemih@yahoo.com

 Keywords   hydrating, chemical shrinkage, autogenous shrinkage, adherence

 Abstract
The operation of wells cementing has as purpose the sealing of the space between the casing-string and the well wall for the solving of some technical and environment problems, meaning that fluids migration from the depth in less deep layers or on the surface must be prevented. During the slurry transformation in stone are taking place some phenomena which can have as a result a poor sealing of the circle well space. A deep knowledgement of the causes of these undesired effects will allow us to find the most appropriate solutions as receipes and/or cementing procedures.

 Rezumat
Prin operaţia de cimentare a sondelor se urmareşte etanşarea spaţiului dintre coloana şi peretele sondei în vederea rezolvării unor probleme tehnice şi de mediu, în sensul că trebuie prevenită migrarea fluidelor de la adâncime in stratele mai puţin adânci sau la suprafaţă Pe parcursul transformării pastei de ciment in piatră, se produc unele fenomene care pot avea ca rezultat nerealizarea etanşării spaţiului inelar al sondei. Cunoaşterea mai aprofundată a cauzelor acestor efecte nedorite, ne va permite găsirea celor mai potrivite soluţii, ca reţete şi/sau proceduri de cimentare.



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