Abstract
This paper aims at determining the behavior of thermal water brought to surface and how this might impact reinjection wells and the rock during reinjection. The biggest problem is that reinjection wells are predisposed to choking. We searched for a method to examine this process, including a model for physico-chemical changes in the water—rock interaction. Two different samples of powdered rock (designated α and β) were analyzed using thermal water samples from production and reinjection wells. The pH shows significant differences between the samples from wells where free water treatment was carried out, and those from the aerated thermal waters, as well as for the rock sample. Basically, a decrease in sediment volume can be obtained by increasing the pH. The salt effect was more coherent. Its result was an interesting case of W-shaped graphs from the producing well. On the other hand there is virtually no difference between the samples with acid titration.
Highlights
This research aims to determine the behavior of thermal water brought to the surface, and to determine its impact on reinjection wells and the rock during reinjection
The water tests for pH, salinity measurement and potentiometric titration were performed under airless as well as aerated conditions
We indicated the pH value with black font and derived ones with red font
Summary
This research aims to determine the behavior of thermal water brought to the surface, and to determine its impact on reinjection wells and the rock during reinjection. In its course the main aim was to find a method to test this process and determine a model for physico-chemical changes at surface of the water and the water–rock. The effect of thermal water aeration and water–rock interaction 307 interaction system. The water tests for pH, salinity measurement and potentiometric titration were performed under airless as well as aerated conditions. The rock–water interaction studies were carried out using the well-known colloid-chemical sedimentary tests and models (Family and Vicsek 1991). Measurements and data collection were subjected to several repetitions. The results of these measurements went were statistically evaluated
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