This paper presents a new form of monitoring pressure interference data between two parallel horizontal wells for mapping reservoir permeability structure. The method is based on integrating the responses at multiple isolated probing points along a horizontal well path, and mapping permeability profiles from the application of a hybrid of deterministic and stochastic models.

Application to realistic system includes complex systems with channel sands embedded within an otherwise low permeability reservoir and discontinuous shale layers affecting vertical permeability.

The proposed method conceptually requires one or more pulsing points within the active horizontal well and a tool similar to an RFT moved along the responding well. Pressure responses from a series of interference tests, between two horizontal wells, are modeled to map the permeability distribution between the two wells.

The procedure has application in designing SAGD and other recovery processes in reservoirs where pairs of horizontal wells are planned for improved recovery. Information obtained, however, can further help in conditioning of geological models for other well configurations.

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