chemical flooding bridging the gap between chemical flooding and independent oil producers
TRANSCRIPT
Objective
• To design efficient chemical flooding processes for KS leases/reservoirs.
• The designs are necessary for Independent Oil Operators to make an informed assessment for implementation of a pilot or demonstration project.
Team
Stan McCool, Paul Willhite, Tony WaltonMark Ballard, Jyun Syung Tsau, Don GreenGrad. Stud.: Ahmed, Lin, SeniorPostdocs: Song (Dec), Rondon (Jan)
Tasks
I. Identify and select 10 leases
II. Design efficient chemical formulations
III. Simulate field applications and evaluate economics for 2 leases
IV. Document results and transfer technology
Identify/Select Leases
Methods Public data (KGS) • Not successful Interviews with operators• Top 30 producers• Top 10 is SE KS• 45% KS oil production
Criteria• Successful waterfood
Lease Operator API Acres Wells Zone
Trembley Berexco 36 7 LKC J
Wahrman Vess 33 30 3 LKC J
Missouri Flats Merit 38 1260 12 Lansing Marmaton
Tobias Berexco 35 12 Simpson Sand
Celia South Murfin 27 1440 31 Cherokee Lime
Chester Waterflood Cimerex Chester Sand
Pleasant Prairie Oxy 36 10 Chester Sand
Stewart Petro-Santander 27 1550 Morrow
Woodhead Colt 28 160 Cherokee Squirrel
Muddy Creek Stelbar 38 160 7 Cherokee B’ville
Define Efficient Chemical Systems
Laboratory tests on 10 crude/brine samples Acid number of crude oils Trembley and Wahrman leases Phase behavior studies
Flow Tests in rocks Mobility of polymer solutions
Formulation
Solubilizationratio
(mL/mL)
Time to equilibrate
(days)
Optimal salinity (wt% NaCl)
A10.62% Petrostep S1, 0.38% Petrostep S22% SBA, 0.05 wt% NaOH
15 3 4.6
A20.62% Petrostep S1, 0.38% Petrostep S22% SBA, 1 wt% Na2CO3
14 6 4.22
0.62% Alfoterra 123-8s, 0.38% PetrostepS22% SBA
11 14 4.47
A30.62% Alfoterra 123-8s, 0.38% Petrostep S20.75% IBA, 0.05 wt% NaOH
15 3 5
0.62% Alfoterra 123-8s, 0.38% Petrostep C50.75% IBA, 0.25 wt% NaOH 13 3 9.72
A40.67% Petrostep S13-C, 0.33% Petrostep S21.5% IBA, 0.2 wt% NaOH
14.9 3 3.15
Trembley Crude Oil at 115°F
Salinity (wt% NaCl)
0.625 wt% Alfoterra® 123-8s, 0.375 wt% Petrostep® S-20.75 wt% IBA and 0.05 wt% NaOH;Trembley crude oil; 46.1 °C.
Simulate field applications and evaluate economics
Develop geological models History-match primary and secondary processes Conduct simulations of chemical floods Estimate costs Determine ROR for pilot and field projects