On the applicability of Persistent Scatterers
نویسندگان
چکیده
7 Persistent scatterers synthetic aperture radar interferometry (PSI) analysis is viewed as a 8 promising monitoring technique for multiyear detection of ground surface displacements 9 during long term CO2 injection into deep aquifers (of the order of 25 to 50 years). 10 This technique was successfully utilized at the CO2 storage site of In-Salah (Algeria). 11 Nevertheless, this success may not be generalized to future onshore industrial-scale CO2 12 storage sites, which are planned in far more complex contexts mostly presenting natural 13 terrains, either agricultural or vegetated areas, i.e. characterized by poor PS density, which 14 might locally drop to zero, hence hampering the deployment of the PSI technique. The 15 objective of the present paper is to discuss the constraints on the PSI application regarding the 16 specificities (magnitude, spatial or temporal scales and evolution) of the deformation 17 phenomenon associated with the CO2 injection into storage aquifers. This discussion is 18 supported by the estimates of the expected spatio-temporal evolution of surface vertical 19 displacements caused by CO2 injection in deep aquifers by combining the approximate 20 solutions for pressure build-up and for the associated vertical displacements in an elastic half21 1 Corresponding author. Tel.: + 33-2-38-64-30-92; fax: + 33-2-38-64-30-92. E-mail address: [email protected] (J. Rohmer). ha l-0 07 33 36 0, v er si on 1 18 S ep 2 01 2 Author manuscript, published in "Engineering Geology 147-148 (2012) 137-148" DOI : 10.1016/j.enggeo.2012.07.010
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