Water/chalk (or collapsible soil) interaction: part II. results of tests performed in laboratory on lixhe chalk to calibrate water/chalk models

摘要

Ekofisk, Valhall and other North Sea reservoirs are made of water sensitive rocks such as pure high porosity chalk. Production of these fields implying water-flooding leads in several cases to compaction and subsidence. In order to perform reliable predictions of compaction and subsidence when water-flooding such reservoirs, it is necessary to take into account not only the deformations that come from depletion in the compressible reservoir rocks but also to include additional deforamtions induced by water saturation (WS) increase.