Evaluation of the Kinetic and Thermodynamic Behavior of Tracers for Their Applicability in SWCTT

Determining residual oil saturation by the single-well chemical tracer test (SWCTT) is of key importance for assessing the potential of enhanced oil recovery (EOR) and developing EOR pilot projects. However, the test trials conducted since the first injections of tracer compositions until now have n...

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Veröffentlicht in:Processes 2022-11, Vol.10 (11), p.2395
Hauptverfasser: Anikin, Oleg V., Bolotov, Alexander V., Mukhutdinova, Alfiya R., Varfolomeev, Mikhail A.
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container_end_page
container_issue 11
container_start_page 2395
container_title Processes
container_volume 10
creator Anikin, Oleg V.
Bolotov, Alexander V.
Mukhutdinova, Alfiya R.
Varfolomeev, Mikhail A.
description Determining residual oil saturation by the single-well chemical tracer test (SWCTT) is of key importance for assessing the potential of enhanced oil recovery (EOR) and developing EOR pilot projects. However, the test trials conducted since the first injections of tracer compositions until now have not resulted in a detailed analysis of the selection of candidates for single-well tracers and their limits of applicability in various reservoir conditions. The purpose of this study was to consider the influence of the structure on the kinetic and thermodynamic components of tracers to assess their application’s operating intervals. It is shown that the rate of single-phase and two-phase hydrolysis of the primary partitioning tracer makes it possible to predict the shut-in time by calculating when the tracer is injected at the reservoir temperature. The influence of the tracer structure during the extraction process with an increase in the hydrocarbon chain of the ester in a different range of brine salinity and temperature has been studied. As a result, this work provides a method for evaluating the thermodynamic and kinetic behavior of primary tracers to establish minimum and maximum threshold K-values at various values of residual oil saturation, temperature, and brine salinity, taking into account the optimal time of the well shut-in to carry out at least 1/2 hydrolysis of esters.
doi_str_mv 10.3390/pr10112395
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subjects Accuracy
Acids
Alcohol
Analysis
Brines
Chromatography
Enhanced oil recovery
Esters
Evaluation
Hydrolysis
Molecular chains
Oil
Oil and gas exploration
Performance evaluation
Petroleum mining
Reservoirs
Salinity
Salinity effects
Saturation
Surfactants
Thermodynamic properties
Thermodynamics
Tracers
Tracers (Biology)
title Evaluation of the Kinetic and Thermodynamic Behavior of Tracers for Their Applicability in SWCTT
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