An analytical model for compaction of confined stress-sensitive reservoirs

Fluid extraction has lead to compaction, subsidence and even earthquakes many places around the world. Although rare, the environmental cost could be overwhelming. If deemed adverse, preventive actions should be started as soon as possible to mitigate future damage. For example, compaction and subsidence has been problematic for Venice, Ekofisk and Groningen. The purpose of this study is to enable prediction of possible compaction by a simplified analytical model. Studies by numerical models are time consuming and expensive. A fluid production period may may also be necessary to to match the model to observed behavior. Due to its simplicity, we believe our method will be useful, at least as a screening tool.