Surface deformation measurements have been used for years in oilfields to monitor production,waterflooding,waste injection,steam flooding,and Cyclic Steam Stimulation (CSS).They have been proven to be a very effective way to monitor the field operations and save money for operators wishing to avoid unwanted surface breeches,casing failures and excessive subsidence due to production.This paper demonstrates that more information can be extracted from surface deformation measurements by inverting the surface deformation for the volumetric deformation at the reservoir level,so the aerial distribution of volumetric deformation can be identified.First,a poroelastic model is presented to calculate.
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