Slug Test Data Analysis in Reservoirs with Double Porosity Behavior

Abstract

Pressure analysis for a slug test which corresponds to the flow period of a Drill Stem test is extended to wells in reservoirs with double-porosity behaviour. Solutions are obtained for either pseudosteady state or transient interporosity flow. The distinctive specific features of both solutions are identified. Results presented are applicable to both naturallyfractured and layered reservoirs with the more permeable layer connecting to the wellbore. Type curves based on the pseudo-steady or transient inter porosity flow are presented. These type curves are similar to the existing homogenous single layer type curve with addition of interporosity flow lines indicating double-porosity behaviour.