TECHICAL Series MATHEMATICS  INFORMATICS  PHYSICS Series PHILOLOGY Series ECONOMIC SCIENCES Sereies EDUCATIONAL SCIENCES Series LAW AND SOCIAL SCIENCES Series
Experimental Research Regarding the Calculation of Well Sand Granularity
(Cercetări experimentale privind determinarea granulozității nisipului din sondă)
Vol LXVIII • No. 2/2016
Maria Popescu
Petroleum-Gas University of Ploiesti, Bd. București 39, Ploiesti
e-mail:popescumariagabi@yahoo.com

 Keywords   sand, granularity, medium granularity (M50), mechanical sifting sieves

 Abstract
The experimental part, regarding the calculation of the well sand granularity, is done in the following way: according to STAS 1934/4-72, the calculation of the granularity is done by the mechanical sifting of the well sands, the diagram of the sand granularity histogram is done, the cumulative curve of the granularity frequency is traced. The form and aspect of the grains of sand surfaces are determined. The forms of the grains are: round, rounded, ragged and splinter-like; and the aspects of the grains are: smooth, rough and broken. For the studio there are used 100 grams of sand from the wells in Videle, from Videle oil field. A mechanical sifting device, with horizontal and vertical vibrations, will be used. The experimental study of the well sand granularity was made in order to establish the working conditions/parameters for erosion wear research of the depth screw pumps, used for crude oil recovery [3, 4].


 Rezumat
Nisipul folosit pentru cercetarea experimentala, a fost colectat de la sondele ce fac parte din Schela Videle. S-au facut cernerile prin mai multe site, de diverse marimi ale ochiului sitei, cu un aparat special, care a facut sa se determine restul pe sita. S-a redat histograma granulatiei nisipului, dupa care s-a calculat gradul de uniformizare GU. Apoi cu o aparatura de laborator, s-au putut observa forma granulelor de nisip, cat si aspectul suprafetelor granulelor de nisip.
Studiul experimental al granulatiei nisipului continut de titeiul din sondele de extractie, a fost realizat in scopul stabilirii conditiilor/parametrilor de lucru al cercetarii comportarii la uzura a pompelor de extractie cu surub.



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