Oil Recovery by Sequential Waterflooding of Mixed-Wet Sandstone and Limestone

Autor:	Norman R. Morrow, Xina Xie, Nina Loahardjo
Rok vydání:	2010
Předmět:	Outcrop General Chemical Engineering Flooding (psychology) Residual oil Energy Engineering and Power Technology Mineralogy Artificial seawater chemistry.chemical_compound Fuel Technology chemistry Brining Carbonate Seawater Oil field Geology
Zdroj:	Energy & Fuels. 24:5073-5080
ISSN:	1520-5029 0887-0624
Popis:	Duplicate tests on mixed-wet sandstone cores have been shown to give closely reproducible results. For studies with reservoir cores, duplicate tests are often precluded because of the limited availability of cores and their heterogeneity. In repeat flooding tests for recovery of crude oil, it has been found that each test affects the outcome of a subsequent test. Some consistent trends of increase in recovery have been observed. In this paper, results are presented for up to four cycles of flooding between initial water saturation and residual oil for reservoir sandstone, outcrop sandstone, and outcrop oolitic limestone. A single crude oil was used for most of the tests. Sequential flooding was also tested for low- and high-viscosity mineral oils. The brine was synthetic seawater for all but one of the floods. Each consecutive flood for the sandstones resulted in a systematic increase in the recovery of crude oil. Crude oil was sometimes produced as an emulsion of about 2% water. Trends for carbonate core...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ee560641264bad30ad043c5563567e58 https://doi.org/10.1021/ef100729b Zobrazit plný text záznamu