TY - JOUR
T1 - InSAR Monitoring of Ground Deformation due to COsub2/sub Injection at an Enhanced Oil Recovery Site, West Texas
AU - Yang, Qian
AU - Zhao, Wenliang
AU - Dixon, Timothy H.
AU - Amelung, Falk
AU - Shik Han, Weon
AU - Li, Peng
PY - 2015/10/1
Y1 - 2015/10/1
N2 - Interferometric synthetic aperture radar (InSAR) measurements have been used to measure ground deformation associated with fluid injection/production at an enhanced oil recovery (EOR) field in Scurry County, West Texas. 100 million tons (Mt) of supercritical CO 2 have been sequestered here since 1972, of which about half has been sequestered since 2004. InSAR data show surface uplift up to 10 cm in the field between January 2007 and March 2011. We evaluated data concerning injection and production of CO 2 , water, oil and hydrocarbon gas from 2004 to 2011 to investigate causes of the observed uplift. An analytical model is used to calculate reservoir pressure change and surface displacement. Our simulations show up to 10 MPa pressure buildup in the reservoir over four years of net injection and production. Surface displacement predictions agree well with the InSAR observations. Water injection alone cannot explain the 2007–2011 surface uplift because the net injected water (∼1 Mt) is negligible compared to the net injected CO 2 (∼24 Mt). The predicted total pressure buildup (up to 10 MPa) consists of net CO 2 injection (up to 12 MPa), net water injection (up to 2 MPa), and oil and gas production (up to −0.4 MPa). Hence, observed ground uplift was mainly caused by CO 2 injection.
AB - Interferometric synthetic aperture radar (InSAR) measurements have been used to measure ground deformation associated with fluid injection/production at an enhanced oil recovery (EOR) field in Scurry County, West Texas. 100 million tons (Mt) of supercritical CO 2 have been sequestered here since 1972, of which about half has been sequestered since 2004. InSAR data show surface uplift up to 10 cm in the field between January 2007 and March 2011. We evaluated data concerning injection and production of CO 2 , water, oil and hydrocarbon gas from 2004 to 2011 to investigate causes of the observed uplift. An analytical model is used to calculate reservoir pressure change and surface displacement. Our simulations show up to 10 MPa pressure buildup in the reservoir over four years of net injection and production. Surface displacement predictions agree well with the InSAR observations. Water injection alone cannot explain the 2007–2011 surface uplift because the net injected water (∼1 Mt) is negligible compared to the net injected CO 2 (∼24 Mt). The predicted total pressure buildup (up to 10 MPa) consists of net CO 2 injection (up to 12 MPa), net water injection (up to 2 MPa), and oil and gas production (up to −0.4 MPa). Hence, observed ground uplift was mainly caused by CO 2 injection.
KW - CO2-EOR
KW - Ground surface deformation
KW - InSAR
KW - Modeling
UR - https://digitalcommons.usf.edu/geo_facpub/1537
UR - https://doi.org/10.1016/j.ijggc.2015.06.016
U2 - 10.1016/j.ijggc.2015.06.016
DO - 10.1016/j.ijggc.2015.06.016
M3 - Article
VL - 41
JO - International Journal of Greenhouse Gas Control
JF - International Journal of Greenhouse Gas Control
ER -