Abstract
The availability of analytical solutions to analyze injectivity and falloff tests is desired to estimate well injectivity performance and reservoir parameters owing to their simplicity in interpreting pressure transient data acquired during such tests. However, the currently available analytical solutions can only describe injectivity and falloff tests in single-layer reservoirs with horizontal wells and multilayer systems with vertical wells. Therefore, the main purpose of this work is to develop new analytical solutions that can be used to accurately interpret and analyze injectivity and falloff tests conducted in multilayer reservoirs drilled by multilateral horizontal wells under two-phase flow. The presented solutions showed a good agreement with the results obtained from a general purpose commercial reservoir simulator. Moreover, the proposed solutions can be used to accurately estimate the reservoir equivalent permeability and also as forward models for nonlinear regression techniques and history matching methods.
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