Investigation of the dissolving ability of the acid composition GBС-F in relation to rocks
R. N. MUSTAFIN, L. K. ALTUNINA, V. V. KOZLOV, M. R. SHOLIDODOV, A. R. SAIDENTSAL
Institute of Petroleum Chemistry, Siberian Branch of the Russian Academy of Sciences, Tomsk, Russia
Keywords: acid treatment, acid composition, rocks, methods of enhancing oil recovery, dissolving ability
Abstract
Results of the study of a multifunctional acid composition GBС-F based on surfactants, polyol, an adduct of inorganic acid and carbonic acid diamide are presented. The dissolving ability of the acid composition in concentrated and diluted forms in relation to terrigenous and carbonate rocks, quartz and pyrite was studied. The use of the GBС-F composition was determined to cause different dissolving effects on the rocks of different types. It is shown that concentrated or diluted GBC-F affects the rocks to different extents: quartz and pyrite dissolved better in the diluted solution of the acid composition, while the use of concentrated GBC-F (the liquid commercial form) had the maximum effect when dissolving carbonate rock. In the study of terrigenous reservoir, rock solubility in the concentrate of GBC-F during the first hours was better than in the diluted solution, but after soaking for 24 h the values became equal.
|
