EORI Research Adjusted Brine Chemistry for Improved Recovery Update on Progress January 2009 Geoffrey Thyne Enhanced Oil Recovery Institute University of Wyoming
Outline Overview of Projects Chemical and Water Flooding Field Data Analysis Laboratory Progress
Major Projects Jun-Dec 2008 Completion of EORI Chemical and Adjusted Brine Chemistry Lab Design of Laboratory Experiments Preliminary Lab Work Geochemical Compatibility Studies Production History Analysis for Chemical and Water Flooding Screening and Scoping Tools Investigation of Controls on Emulsion Formation (organic geochemistry with WRI)
Major Projects Jun-Dec 2008 Completion of EORI Chemical and Adjusted Brine Chemistry Lab Design of Laboratory Experiments Preliminary Lab Work Geochemical Compatibility Studies Production History Analysis for Chemical and Water Flooding Screening and Scoping Tools Investigation of Controls on Emulsion Formation (organic geochemistry with WRI)
EORI Laboratory Courtesy Glen Murrell
EORI Laboratory All equipment calibrated Preliminary core flood (Berea) completed Berea block characterized Minnelusa Oil fully characterized 1.2E+05 Rock Wy - X1 1.0E+05 Rock Wy - Z1 Rock Wy - Y1 8.0E+04 Oil Capillary Pressure (Pa) 6.0E+04 4.0E+04 2.0E+04 0.0E+00 0 20 40 60 80 100 Water Saturation (%) - Brine 2000ppm
EORI Laboratory
Chemical and Water Flooding in Wyoming Evaluate water flood and chemical flooding history in Minnelusa Wyoming reservoirs using recovery factor Mean polymer recovery = 53% Mean WF recovery = 46% Recovery Factor (%OOIP) 125 100 75 50 25 0 Polymer low-sal polymer WF low sal-wf 0 1 2 3 4 5 6 7 PV
Chemical Flooding in Wyoming 100 Mean polymer recovery = 53% Mean WF recovery = 46% Minnelusa Fields Recovery Factor (%OOIP) 75 50 25 Polymer 0 0 1 2 3 4 PV
Chemical Flooding in Wyoming Mean polymer recovery = 53% Mean low sal polymer recovery = 48% 100 Minnelusa Fields Recovery Factor (%OOIP) 75 50 25 0 Polymer low-sal polymer 0 1 2 3 4 PV
Modified Chemistry Water Flooding 100 Mean WF recovery = 46% Minnelusa Waterfloods Recovery Factor (%OOIP) 75 50 25 WF 0 0 1 2 3 4 PV
Modified Chemistry Water Flooding Mean FWF recovery = 50% Mean low sal SF = 45% 100 Recovery Factor (%OOIP) 75 50 25 WF low sal-wf 0 0 1 2 3 4 PV
Chemical Profiles of Water Chemistry Compare reservoir, injection and lab water chemistry in order to evaluate possible causes for observed differences. Substantial differences in water chemistry exist that may explain observations.
Better geochemical evaluation of formation and injected brines 10000 Minnelusa Formation and Injection Brines 1000 100 10 meq/l 1 0.1 0.01 0.001 Na K Ca Mg HCO3 Cl SO4 Ions
Laboratory formation brine and formation water are not the same chemically 10000 Minnelusa Formation water 1000 100 10 meq/l 1 0.1 0.01 0.001 Na K Ca Mg HCO3 Cl SO4
Laboratory injection water and field injected water are not the same chemically Minnelusa Injection Water 10000 1000 100 10 meq/l 1 0.1 0.01 0.001 Na K Ca Mg HCO3 Cl SO4
Production History Analysis for Screening and Scoping Incremental recovery for each phase 30000 Transition Falcon Ridge Field - Production History 25000 20000 End of Primary Production Start of Next Production Phase Bbls Oil 15000 10000 5000 0 Nov-84 Nov-89 Nov-94 Nov-99 Nov-04 Date
Screening tool for chemical flooding in Wyoming refined by historic performance metric Minnelusa Fields 1700 P_S increment 1450 1200 high salinity low salinity unknown salinity 950 700 450 S_T increment P_T increment 200-50 SPRING HOLE HAIGHT BISHOP RANCH SWARTZ DRAW SPIRIT LONG TREE STEWART EAST SIMPSON RANCH PRONG CREEK DEADMAN CREEK ADON ROAD FD CANDY DRAW MORAN LAD KUEHNE RANCH** HAMM ROZET WEST SHARP RULE C-H WAGON SPOKE RAINBOW RANCH EDSEL WINDMILL CAMBRIDGE FOURMILE DILLINGER RANCH THOLSON OTTIE DRAW DUTCH STEWART ASH STRAAG DRAW SUMMERFIELD KIEHL WEST BIG MAC T.A. BUTTES TROUT POND DEER FLY RIGHT A WAY SUPERHORNET WOLF DRAW* BRACKEN VICTOR FALCON RIDGE GLO NORTH LITTLE MISSOURI KUEHNE RANCH OK LILY LONE CEDAR KIEHL GUTHREY SEMLEK ALPHA WINTER DRAW* MOORCROFT WEST % increment Field sorted by inj water
Coming Attractions Complete production history analysis Expand recovery factor analysis data for more fields Generate dimensionless chemical flooding curves for scoping model Systematic core flooding experiments Test geochemical modeling for optimizing chemical flooding Further investigation of emulsion controls
Questions?