The paper presents a combined approach to testing hydraulically fractured horizontal wells, including Rate Transient Analysis (RTA), taking into account the results of well logging to determine the flow profile along a horizontal well. The proposed approach to the decline analysis in hydraulically fractured horizontal wells, in addition to evaluating unknown parameters (reservoir permeability, fracture conductivity, skin factor, etc.), allows to remove uncertainty in the parameters of well completion, namely, to calculate individual fracture half-lengths. To illustrate the essence of the method, the sequence of actions for a comprehensive approach to the decline analysis in hydraulically fractured horizontal wells is given.
The proposed approach was tested on field data. A comparison of the results obtained using both the existing and improved approach, based on the model of horizontal well with various fractures, was made. It is shown that the constructed model of the horizontal well with various fractures is characterized by greater reliability compared to the model of the horizontal well with the same fractures and can be used to predict the operation of the well. The combined approach to joint planning and interpretation of the RTA and well logging takes into account the uneven inflow along the hydraulically fractured horizontal well, which, in the future, will allow more correctly predicting additional production from various selective measures at separate stages and will increase the efficiency of geological and technical measures in the hydraulically fractured horizontal wells.
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