Author : Charles Phillip Thomas
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (316 download)
Book Synopsis Improved Water Flooding Through Injection Brine Modification by : Charles Phillip Thomas
Download or read book Improved Water Flooding Through Injection Brine Modification written by Charles Phillip Thomas and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Crude oil/brine/rock interactions can lead to large variations in thedisplacement efficiency of waterflooding, by far the most widely applied methodof improved oil recovery. Laboratory waterflood tests show that injection ofdilute brine can increase oil recovery. Numerous fields in the Powder Riverbasin have been waterflooded using low salinity brine (about 500 ppm) from theMadison limestone or Fox Hills sandstone. Although many uncertainties arise inthe interpretation and comparison of field production data, injection of lowsalinity brine appears to give higher recovery compared to brine of moderatesalinity (about 7,000 ppm). Laboratory studies of the effect of brine compositionon oil recovery cover a wide range of rock types and crude oils. Oil recoveryincreases using low salinity brine as the injection water ranged from a low of nonotable increase to as much as 37.0% depending on the system being studied. Recovery increases using low salinity brine after establishing residual oilsaturation (tertiary mode) ranged from no significant increase to 6.0%. Testswith two sets of reservoir cores and crude oil indicated slight improvement inrecovery for low salinity brine. Crude oil type and rock type (particularly thepresence and distribution of kaolinite) both play a dominant role in the effect thatbrine composition has on waterflood oil recovery.