Laboratory investigation of low salinity waterflooding for carbonate reservoirs

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

نتاج البحث

83 اقتباسات (Scopus)

ملخص

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.

اللغة الأصليةEnglish
عنوان منشور المضيفSociety of Petroleum Engineers - Abu Dhabi International Petroleum Exhibition and Conference 2012, ADIPEC 2012 - Sustainable Energy Growth
العنوان الفرعي لمنشور المضيفPeople, Responsibility, and Innovation
الصفحات1620-1631
عدد الصفحات12
حالة النشرPublished - 2012
الحدثAbu Dhabi International Petroleum Exhibition and Conference 2012 - Sustainable Energy Growth: People, Responsibility, and Innovation, ADIPEC 2012 - Abu Dhabi
المدة: نوفمبر ١١ ٢٠١٢نوفمبر ١٤ ٢٠١٢

سلسلة المنشورات

الاسمSociety of Petroleum Engineers - Abu Dhabi International Petroleum Exhibition and Conference 2012, ADIPEC 2012 - Sustainable Energy Growth: People, Responsibility, and Innovation
مستوى الصوت3

Other

OtherAbu Dhabi International Petroleum Exhibition and Conference 2012 - Sustainable Energy Growth: People, Responsibility, and Innovation, ADIPEC 2012
الدولة/الإقليمUnited Arab Emirates
المدينةAbu Dhabi
المدة١١/١١/١٢١١/١٤/١٢

ASJC Scopus subject areas

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