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Page 1: Chemical Flooding

Chemical Flooding

Bridging the gap between chemical flooding and independent oil producers.

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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.

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Team

Stan McCool, Paul Willhite, Tony WaltonMark Ballard, Jyun Syung Tsau, Don GreenGrad. Stud.: Ahmed, Lin, SeniorPostdocs: Song (Dec), Rondon (Jan)

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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

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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

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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

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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

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 Formulation

Solubilizationratio

(mL/mL)

Time to equilibrate

(days) Optimal salinity

(wt% NaCl)

 

A1 0.62% Petrostep S1, 0.38% Petrostep S22% SBA, 0.05 wt% NaOH 15 3 4.6

A2 0.62% 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

A3 0.62% 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

A4 0.67% Petrostep S13-C, 0.33% Petrostep S21.5% IBA, 0.2 wt% NaOH 14.9 3 3.15

Trembley Crude Oil at 115°F

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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.

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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

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Document results and transfer technology

Technical papers for SPE Presentations for Independent Oil Operators EKOGA, KIOGA, Wichita SPE


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