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A new analytical model for the multi-fractured horizontal well in the naturally fractured reservoir

Abstract

This study mainly puts forward a new analytical trilinear dual-porosity & dual-permeability flow model for the multi-fractured horizontal well (MFHW) in the naturally fractured reservoir (NFR) based on the trilinear dual-porosity flow model (Brown et al., 2011). This model is an upgraded trilinear flow model, a simple but versatile one to integrate horizontal-well-related parameters and petrophysical characteristics of the NFR, including wellbore storage, chocking skin factor, intrinsic properties of matrix and fracture systems, and even different properties of the stimulated area and the unstimulated area. The model incorporates a dual-permeability model for the stimulated flow region and a dual-porosity model for the unstimulated flow region respectively. In common sense, the traditional flow model for the fractured horizontal well with the line-source solution is computationally intensive and time-consuming, while this model makes itself a practical alternative with computational convenience and also incorporates most of the distinct flow patterns identical as the line-source solution does. The new trilinear flow model would show a field-friendly way to analyze transient pressure behaviors of the MFHW in the reservoir with well-developed natural fractures.