FIELD DEMONSTRATION OF CARBON DIOXIDE MISCIBLE FLOODING IN THE LANSING-KANSAS CITY FORMATION, CENTRAL KANSAS Page: 13 of 17
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The pilot is not fully confined on the north side of the pattern. Project design and
management is based on controlling carbon dioxide loss to the north by maintaining the pressure
around C02#10 by maintaining adequate injection rates into C02#10, injection into C02#18 and
controlling the injection/withdrawal ratio in the pilot pattern. Carbon dioxide loss to the north is
estimated to be 30% of the injected volume. Based on analysis of streamlines, it is estimated that
29% of the production from C02#12 and 87% of the production from C02#13 was obtained from
the pattern. The monthly injection rate of carbon dioxide in RB/D is estimated from the fluid
withdrawal rate from the pattern and the losses to the north. The desired injection rate in
reservoir barrels/day should meet fluid withdrawals from the pattern and estimated loss to the
north. Figure 12 shows the I/W ratio for the period from November 2003-December 2004
The I/W ratio should average 1.0 if carbon dioxide injection is in balance with production
rates from C02#12 and #13. Injection exceeded withdrawal from December 2003-February and
stabilized -1 after the production rate in C02#12 was increased in March. The decline in I/W
ratio from May-July is due to excessive vent loss and down time on the injection skid. Three
months of stable operation in August-November were followed by a large increase in I/W ratio
for December due to reduction in the production rate of C02#12 and shutting in of C02#13 for
the carbon dioxide stimulation that was done on December 9. Restoring the I/W ratio to 1.0 is
necessary for effective management of the pilot project.
Based on 30% Loss to the North
Nov- Dec- Jan- Feb- Mar- Apr- May- Jun- Jul- Aug- Sep- Oct- Nov- Dec-
03 03 04 04 04 04 04 04 04 04 04 04 04 04
Figure 12: Estimated ratio of injection to withdrawal rates
Figure 13 shows the estimated distribution of injected carbon dioxide between the pilot
area(PPV) and loss to the north. The PPV is the carbon dioxide processed pore volume that is
produced by fluid withdrawal from C02#12 and #13.
Semi Annual Technical Progress Report December 31, 2004 13
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Byrnes, Alan; Willhite, G. Paul; Green, Don; Dubois, Martin; Pancake, Richard; Carr, Timothy et al. FIELD DEMONSTRATION OF CARBON DIOXIDE MISCIBLE FLOODING IN THE LANSING-KANSAS CITY FORMATION, CENTRAL KANSAS, report, December 31, 2004; United States. (digital.library.unt.edu/ark:/67531/metadc784706/m1/13/: accessed November 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.