Studying rheological properties and reactivity of acid solutions with thickening additives
https://doi.org/10.31660/0445-0108-2021-1-40-54
Abstract
This article is the result of studies of rheological properties and reactivity of acid solutions of technical lignosulfonate, decationized lignosulfonic acid, and hydrochloric acid with the addition of lignosulfonate. Compositions that include lignosulfonate can be used as displacement agents in the development of watered layers with inhomogeneous reservoir properties. The use of thickening additives in acid solutions solves several problems. Slowing the reaction rate will allow the acid flow to leak in the reservoir deeper, with saving of acid capacity. The height viscosity of the compositions increases the sweep efficiency of the bottomhole zone by acid treatment. Due to the fact that thickening additives in the compositions have a high concentration, selective isolation of highly permeable areas of the reservoir can be realized, which, in turn, contributes to the formation of new pore channels.
We evaluated the reactivity of acid solutions with thickening additives in the interaction with carbonate samples. The presence of technical lignosulfonate in an acid solution reduces the dissolution rate of samples. Slowing down the reaction rate will allow the acid composition to form long channels of high permeability, which, in turn, increases the efficiency of acid treatment.
About the Authors
M. B. Dorfman
Northern (Arctic) Federal University named after M. V. Lomonosov
Russian Federation
Russian Federation
Mikhail B. Dorfman, Candidate of Engineering, Associate Professor at the Department of Well Drilling, Oil and Gas Field Development
Arkhangelsk
A. A. Sentemov
Northern (Arctic) Federal University named after M. V. Lomonosov
Russian Federation
Russian Federation
Andrey A. Sentemov, Postgraduate at the Department of Well Drilling, Oil and Gas Field Development
Arkhangelsk
I. P. Belozerov
Northern (Arctic) Federal University named after M. V. Lomonosov
Russian Federation
Russian Federation
Ivan P. Belozerov, Engineer of Petrophysical Core Studies Laboratory in Innovative Technology Center of Arctic Oil and Gas Laboratory Studies
Arkhangelsk
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Review
For citations:
Dorfman M.B., Sentemov A.A., Belozerov I.P. Studying rheological properties and reactivity of acid solutions with thickening additives. Oil and Gas Studies. 2021;(1):40-54. (In Russ.) https://doi.org/10.31660/0445-0108-2021-1-40-54
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