Experimental investigation of low salinity water-flooding efficiency in a Danish North Sea chalk reservoir

R. Mokhtari, B. Anabaraonye, S. Mohammadkhani, K. Feilberg

Publikation: Bidrag til bog/rapport/konferenceproceedingsKonferenceartikel i proceedingspeer review

Abstrakt

This research aims to investigate the effect of brine composition, injection scenario and temperature on oil recovery during low salinity water flooding in chalk core samples from a Danish North Sea reservoir. In addition, the mechanisms governing oil-brine-rock interactions are investigated by analyzing effluent samples and interfacial tension (IFT) measurements. For this purpose, by means of computed tomography (CT) results, homogenous chalk core samples (without any open fractures) were selected. These cores were saturated with reservoir fluids and aged at reservoir conditions for approximately three weeks. Several synthetic brines (including formation water, seawater and diluted seawater) were introduced through different injection scenarios into the aged cores at reservoir conditions. Brines used in this study were equilibrated with calcite at room temperature to minimize the effect of rock dissolution on oil recovery. Insights into the role of brine chemistry was obtained through effluent analysis performed using ion chromatography and ICP-OES. IFT measurements were conducted using a pendant drop method to quantify the extent of brine-oil interactions at reservoir conditions.

OriginalsprogEngelsk
Titel82nd EAGE Conference and Exhibition 2021
ForlagEuropean Association of Geoscientists and Engineers, EAGE
Sider2577-2581
Antal sider5
ISBN (Elektronisk)9781713841449
DOI
StatusUdgivet - 2021
Udgivet eksterntJa
Begivenhed82nd EAGE Conference and Exhibition 2021 - Amsterdam, Virtual, Holland
Varighed: 18 okt. 202121 okt. 2021

Konference

Konference82nd EAGE Conference and Exhibition 2021
Land/OmrådeHolland
ByAmsterdam, Virtual
Periode18/10/2121/10/21

Programområde

  • Programområde 3: Energiressourcer

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