Pressure Transient Analysis for the Simultaneous Production and Injection in Different Layers of the Same Well

摘要

A new model was developed to describe the transient flow behavior in a reservoir-borehole similar to the GeneSys project.The model consists of a production and an injection layer and an intermediate low permeable layer.Further production equals injection rate.The results of model simulations highlights the influence of different parameters of the active layers and of the intermediate low-permeable layer,wellbore storage and skin factor on the pressure behavior in the well and the flow behavior assuming production or injection in only one of the active layers.The model seems to adequately describe field data from the Horstberg project and provides insight into the pressure behavior in lavers of single wells.These findings should be taken into account during the test planning of such wells and can be applied as a diagnostic tool for the analysis respective test results and make test analysis more representative.