The resource play development cycle is a continuous loop that constitutes hydraulic fracture stimulation, production analysis, and redesign of subsequent stimulation treatments. Objectives of the cycle include optimizing lateral length, cluster spacing, injected volumes and types of proppants and fracturing fluids. During the stimulation process, leak-off invasion of the hydraulic fluid to the formation occurs and the fracture is left completely saturated with fracture fluid. Consequently, initial production is transient two-phase flow. One aim of this work is to improve analysis during this two -phase flow period. Production analysis has been a fundamental tool in analyzing hydraulically stimulated reservoirs. Previously presented work is based on single phase flow. For shale gas reservoirs, gas production increases during clean-up; this can occur at the end of fracture linear flow or may continue into the bilinear flow period due to the continued recovery of frac load fluid. This work investigates transient two-phase flow exhibited in multi-stage hydraulically-fractured shale gas reservoirs as well as terminal production after stage competition instigates boundary dominated flow. The effect of relative permeability, fracture storage capacity and fracture conductivity on the production behavior including bilinear and formation linear flow is investigated by the means of parametric studies utilizing numerical simulation. Cluster spacing is used as a parameter in the boundary dominated production period. This analysis is applied to field production data and case histories are presented. Results of this investigation are summarized in decline type curves.

You can access this article if you purchase or spend a download.