Compaction in a confined deforming reservoir

A reduction of fluid pressure may lead to altered permeability and reduced thickness. This may lead to reduced well performance and well integrity. In some cases, subsidence and even earthquakes may occur. Although rare, such incidences have occurred many places around the world. The objective of this study is to present results obtained by a simplified analytical model for compacting reservoirs. Based on the constant modulus approach, we present approximate analytical solutions for stress-sensitive deforming reservoirs, and plot the corresponding type curves. We derive the equation for the dynamic behavior of the thickness and show plots of normalized thickness as a function of dimensionless time.