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APLICATION OF LOCAL CEMENT FOR CEMENTING OIL WELLS IN THE SOUTH EASTERN REGION OF THE PANNONIAN BASIN

By
Zvonimir Bošković ,
Zvonimir Bošković

Faculty of Mining and Geology Belgrade, University of Belgrade, Belgrade, Serbia

Vladimir Čebašek ,
Vladimir Čebašek

Faculty of Mining and Geology Belgrade, University of Belgrade, Belgrade, Serbia

Nebojša Gojković
Nebojša Gojković

Faculty of Mining and Geology Belgrade, University of Belgrade, Belgrade, Serbia

Abstract

Wells conditions are different in wide range of temperature and depth. Cement slurries in such conditions have to remain pumpable and after setting to stay homogenous in production well life. For cementing operations in wide range of temperature and pressure and to accommodate cement slurries for individual well requirements more than 50 additives are now used for various API classes of cement. Laboratory in NIS – National oil company of Serbia, provides cement analysis of dry cement, tests on cement slurries and cement stone in compliance with methods prescribed by API standard, whereby quality and type of equipment fully meet the requirements. Adaptation of the local cement to the well conditions had already been done by these additives and by numerous tests of pure cement and cement mixtures we developed a palette of typical cement mixtures for cementing oil wells in the south eastern region of the Pannonian basin.

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