petak, 15 dec 2017




Original scientific paper
UDC: 691.54:624.153.7
DOI: 10.7251/afts.2014.0610.065B
COBISS.RS-ID: 4226328




Bošković Zvonimir1, Čebašek Vladimir1

1 Rudarsko-geološki fakultet, Beograd, E-mail: Ova adresa el. pošte zaštićena je od spam napada, treba omogućiti JavaSkript da biste je videli



ABSTRACT  Full text (pdf)


Cemented boreholes annulus its stability achieved tightness must be maintained in the continuation phase of drilling, is that in the process of drilling, cementing, production. Preserving stability in the working life of the wells threatened and technological stage of the production process due to the natural development of conditioned stress-laden formation (swelling) and a reduction of fluid volume in the reservoir and operational procedures (from moderate to high pressures and temperatures, as well as - technical interventions (changes type of working fluid, leaking  testing, perforating, injection, hydraulic fracturing, other operations).  From cement  mixture composition  depend on the mechanical properties of hardened cement stone. Increase elasticity is associated with a reduction in the compressive strength and must always check that the compressive strength of cement stone ensure the stability of pipes due to well working life.

Key words: borehole, cement stone, stress state, finite element method



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