Recovery of carboxylic acid tracers in two phase flow experiments with Danish chalk

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Abstract

There is mounting evidences that modified salinity flooding can positively impact oil recovery in some types of reservoirs. Hypotheses have been proposed linking the modified salinity effect with the changing “wettability” and adsorption of petroleum components on rock surfaces. The distribution of oxygenated compounds, primarily carboxylic acids, in the different phases can significantly impact the wettability of the rock surface, which results in changing recovery factors. Active polar compounds govern the interfacial behavior of the crude oil and can act as “anchors” binding crude oil on the chalk surface, which can be mobilized by different injection fluids. To reveal the mechanism, it is necessary to understand the distribution of those “sticky molecules” in different phases. This study examines the distribution of different carboxylic acid molecules in a two-phases flow experiment in carbonate rock using Danish North Sea reservoir chalk. The approach is to spike tracers into crude oil and monitor their recovery during a core flooding experiments. The oil phase in the effluent is analyzed by liquid-liquid extraction followed by mass spectrometry analysis. The partitioning of those acid tracers on chalk and in aqueous phase was also examined in two-phase equilibrium to assist with the interpretation of the experimental observations.

Original languageEnglish
Title of host publicationProceedings of the 83rd EAGE Conference and Exhibition 
Volume5
PublisherEuropean Association of Geoscientists and Engineers
Publication date2022
Pages3200-3204
ISBN (Electronic)978-171385931-4
Publication statusPublished - 2022
Event83rd EAGE Annual Conference & Exhibition - IFEMA, Madrid, Spain
Duration: 6 Jun 20229 Jun 2022
Conference number: 83
https://eage.eventsair.com/eageannual2022/

Conference

Conference83rd EAGE Annual Conference & Exhibition
Number83
LocationIFEMA
Country/TerritorySpain
CityMadrid
Period06/06/202209/06/2022
Internet address

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