Laboratory investigation of low salinity waterflooding for carbonate reservoirs

Amira S. Al-Harrasi, Rashid S. Al-Maamari, Shehadeh Masalmeh

Research output: Chapter in Book/Report/Conference proceedingConference contribution

37 Citations (Scopus)

Abstract

Low salinity waterflooding (LSF) research has been gaining more momentum in recent years for both sandstone and carbonate reservoirs. Published laboratory data and field tests have shown an increase in oil recovery by changing injected brine salinity, especially for sandstone reservoirs. It is widely accepted that low salinity water alters the wettability of the reservoir rock from less to more water-wet conditions, oil is then released from rock surfaces and recovery is increased. The main objectives of the current study are to: test the potential of increasing oil recovery by LSF of a carbonate reservoir and to investigate the factors that control it. The impact of LSF on oil recovery was investigated by conducting coreflood and spontaneous imbibition experiments at 70°C using core samples from a carbonate reservoir, crude oil and synthetic brine (194,450 ppm) which was mixed with distilled water in four proportions twice, 5 times, 10 times and 100 times dilution brines. Moreover, both crude oil/brine interfacial tension measurements (IFT) and ionic exchange experiments were carried out at room temperature (25°C). The results of the study show higher oil recovery as a result of reducing injected water salinity in both coreflood and spontaneous imbibition experiments. Coreflood experiments showed an increase in oil recovery by 3 to 5% of OOIP, while spontaneous imbibition experiments showed an increased by 16 to 21%. Additionally, spontaneous imbibition experiments provide direct evidence of wettability change by the LSF. The study also shows that the increase in oil recovery was obtained at much higher water salinity than the one observed in the case of sandstone rock.

Original languageEnglish
Title of host publicationSociety of Petroleum Engineers - Abu Dhabi International Petroleum Exhibition and Conference 2012, ADIPEC 2012 - Sustainable Energy Growth: People, Responsibility, and Innovation
Pages1620-1631
Number of pages12
Volume3
Publication statusPublished - 2012
EventAbu Dhabi International Petroleum Exhibition and Conference 2012 - Sustainable Energy Growth: People, Responsibility, and Innovation, ADIPEC 2012 - Abu Dhabi, United Arab Emirates
Duration: Nov 11 2012Nov 14 2012

Other

OtherAbu Dhabi International Petroleum Exhibition and Conference 2012 - Sustainable Energy Growth: People, Responsibility, and Innovation, ADIPEC 2012
CountryUnited Arab Emirates
CityAbu Dhabi
Period11/11/1211/14/12

Fingerprint

Well flooding
Carbonates
Oils
imbibition
salinity
carbonate
Recovery
oil
Sandstone
Water
brine
experiment
Experiments
Rocks
wettability
Petroleum
sandstone
crude oil
Wetting
Brines

ASJC Scopus subject areas

  • Geochemistry and Petrology

Cite this

Al-Harrasi, A. S., Al-Maamari, R. S., & Masalmeh, S. (2012). Laboratory investigation of low salinity waterflooding for carbonate reservoirs. In Society of Petroleum Engineers - Abu Dhabi International Petroleum Exhibition and Conference 2012, ADIPEC 2012 - Sustainable Energy Growth: People, Responsibility, and Innovation (Vol. 3, pp. 1620-1631)

Laboratory investigation of low salinity waterflooding for carbonate reservoirs. / Al-Harrasi, Amira S.; Al-Maamari, Rashid S.; Masalmeh, Shehadeh.

Society of Petroleum Engineers - Abu Dhabi International Petroleum Exhibition and Conference 2012, ADIPEC 2012 - Sustainable Energy Growth: People, Responsibility, and Innovation. Vol. 3 2012. p. 1620-1631.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Al-Harrasi, AS, Al-Maamari, RS & Masalmeh, S 2012, Laboratory investigation of low salinity waterflooding for carbonate reservoirs. in Society of Petroleum Engineers - Abu Dhabi International Petroleum Exhibition and Conference 2012, ADIPEC 2012 - Sustainable Energy Growth: People, Responsibility, and Innovation. vol. 3, pp. 1620-1631, Abu Dhabi International Petroleum Exhibition and Conference 2012 - Sustainable Energy Growth: People, Responsibility, and Innovation, ADIPEC 2012, Abu Dhabi, United Arab Emirates, 11/11/12.
Al-Harrasi AS, Al-Maamari RS, Masalmeh S. Laboratory investigation of low salinity waterflooding for carbonate reservoirs. In Society of Petroleum Engineers - Abu Dhabi International Petroleum Exhibition and Conference 2012, ADIPEC 2012 - Sustainable Energy Growth: People, Responsibility, and Innovation. Vol. 3. 2012. p. 1620-1631
Al-Harrasi, Amira S. ; Al-Maamari, Rashid S. ; Masalmeh, Shehadeh. / Laboratory investigation of low salinity waterflooding for carbonate reservoirs. Society of Petroleum Engineers - Abu Dhabi International Petroleum Exhibition and Conference 2012, ADIPEC 2012 - Sustainable Energy Growth: People, Responsibility, and Innovation. Vol. 3 2012. pp. 1620-1631
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