Fully Coupled Analysis of Well Responses in Stress-Sensitive Reservoirs

摘要

A fully coupled geomechanics and single-phase, fluid-flow model is developed to evaluate the combined effects of stress, fluid flow, and reservoir property changes on well responses in stress- sensitive reservoirs. In particular, we pay attention to the interpre- tation of pressure buildup tests and to changes in the production characteristics of wells. In general, for weak hydrocarbon reser- voirs that exhibit nonlinear, elastic and plastic constitutive behav- iors, and stress-dependent properties such as permeability and po- rosity, the physical effect contributed form geomechanics may not be ignored in well test analysis.