Estimated Injected Fluid Volumes - Induced Seismicity Potential in Energy Technologies - page 222

TABLE L.2 Carbon Capture and Sequestration Volumes

43 lb/ft 3 Density of liquid CO 2 at 80°C (AIRCO value)

2000 lb 1 ton liquid CO 2

47 ft 3 1 ton liquid CO 2 at 80°C

47,000,000 ft 3 1 million tons liquid CO 2 at 80°C per year

1,330,892 m 3 1 million tons liquid CO 2 at 80°C per year

351,355,488 gal 1 million tons liquid CO 2 at 80°C per year

Result:
1.33 × 10 6 m 3 /year liquid CO 2 at 80°C per year
3.65 × 10 3 m 3 /day liquid CO 2 at 80°C per year
3.51 × 10 8 gal/year liquid CO 2 at 80°C per year
9.63 × 10 5 gal/day liquid CO 2 at 80°C per year

NOTE: Table assumes 1 million tons of liquid CO 2 injection per year. The density/unit weight of liquid
CO 2 varies significantly with temperature; the density of supercritical (liquid) CO 2 ranges from 0.60 to
0.75 g/cm 3 (Sminchak and Gupta, 2003). If one assumes approximately 43 lb/ft 3 (AIGA, 2009) for the unit
weight of CO 2 (approximately 0.64 g/cm 3 ) at a subsurface temperature of 80°C (AIGA, 2009) then 1 ton
of CO 2 equates to 47 ft 3 , and 1 million tons/year equates to 47,000,000 ft 3 /year or 1,330,892 m 3 /year
or 3646 m 3 /day.
SOURCE: Sminchak and Gupta (2003); AIGA (2009).

TABLE L.3 Water Disposal Well Volume Calculations

9,000 bbl/day

42 gal/barrel

378,000 gal/day

137,970,000 gal/year

NOTE: Reported average saltwater disposal (SWD) injection of 8,000-11,000 bbl/day. SWD injection
volumes estimated from Texas Railroad Commission for SWD wells north of DFW airport. Frohlich et al.
(2010) report a survey of SWD wells in Tarrant and Johnson counties that reported rates ranging from
100,000 to 500,000 barrels per month; 9,000 bbl/day was used for graph. Nicot and Scanlon (2012)
state Texas is the top shale producer in the United States.
SOURCE: Frohlich et al. (2010).