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North-Central Section - 47th Annual Meeting (2-3 May 2013)

Paper No. 6
Presentation Time: 10:00 AM

SIMULATION OF CO2 INJECTION INTO ST. FRANCOIS AQUIFER, GREENE COUNTY, MISSOURI


STRATTON, Stephanie L., Department of Geography, Geology, & Planning, Missouri State University, 901 S. National Ave, Springfield, MO 65897 and ROVEY II, Charles W., Geography, Geology, and Planning, Missouri State University, 901 S. National, Springfield, MO 65897, Stratton89@missouristate.edu

Geologic carbon sequestration is being investigated as a means of reducing the CO2 emission from anthropogenic sources in Missouri. The St. Francois aquifer is the deepest available reservoir in Missouri for carbon sequestration; however, the aquifer is not deep enough to allow injection of CO2 at supercritical phase within Greene County. The Missouri Carbon Sequestration Project had hoped to establish an injection test into the aquifer at the City Utilities of Springfield Southwest Power Plant (SWPP) site, but the pore fluids were not saline. Since data was available from the site, it was used to learn more about simulating carbon sequestration.

The program AQTESOLV Pro was used to evaluate pumping and pressure-injection data from SWPP to determine hydraulic conductivities. Those data were then implemented in the program PetraSim 5.2 to develop simulations to help determine how the CO2 might behave hydrodynamically. Compositional simulations with pressure gradients of 0.98 Pa/m and 9.8 Pa/m were generated to reveal plume migration patterns under injection and retrograde conditions. Simulations were a thousand years in duration with an initial 30 year injection period followed by a shut-off period. Simulated injection was within two high hydraulic conductivity zones in the Reagan Sandstone and Lamotte Sandstone of the St. Francois aquifer. A polygonal grid mesh was also used with high resolution around the injection well.

The highest achievable injection rates were within the Reagan Sandstone. This was in correlation to the upper Reagan Sandstone having a permeability of 1.35E-13 m2; whereas the Lamotte Sandstone’s highest permeability was only 8.92E-15 m2. The maximum migration of gas as a separate phase was approximately 4.0 km after a thousand years for simulations with well completion through the Reagan Sandstone. The maximum migration of gas as a separate phase with injection into the Lamotte Sandstone was approximately 700 meters.

This material is based on work sponsored by the Department of Energy National Energy Technology Laboratory under Award Number DEFG2610FE0001790 to Missouri State University.

Session No. 1

CO2 Storage and Greenhouse Gases
Thursday, 2 May 2013: 8:00 AM-12:00 PM
Room 1040/1050 (Fetzer Center)
Geological Society of America Abstracts with Programs. Vol. 45, No. 4, p.2
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