TECHICAL Series MATHEMATICS • INFORMATICS • PHYSICS Series PHILOLOGY Series ECONOMIC SCIENCES Sereies EDUCATIONAL SCIENCES Series LAW AND SOCIAL SCIENCES Series
Overview of Geological Factors with Impact on Pressure Balance in Deep Wells
(O trecere în revistă a factorilor geologici care influenţează echilibrul presiunilor în sondele adânci)
Vol LXVII • No. 2/2015
Dumitru Iordache
Liceul Tehnologic ,,Ludovic Mrazek”, Str. Mihai Bravu, nr. 241, Ploieşti e-mail: dumior.ghighiu@yahoo.com

 Keywords   lithology, pressure, density, temperature, pressure and fracturing gradients

 Abstract
The factors with impact on the balance of pressures inside deep wells are: geological factors, modification of fluid density, influence of structural arrangement of strata and influence of pressure and fracturing gradients. At higher depths, generally over 4000 m, where there are also very high temperatures and pressures, the temperature diminishes the density of the drilling fluid while a higher pressure makes density be higher. Effects do not eliminate each other but one of them becomes prevailing.

 Rezumat
In general, problemele mai importante care au fost tratate in acest articol sunt: principalii parametri si metodele de exprimare a presiunii de formaţie; caracterizarea complexă a unei coloane stratigrafice; analiza comparativă pe cele trei structuri: Colibaşi, Caragele și Piscuri-Filipeşti; principalele pericole și accidente de foraj ce pot să apară la sondă.



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