ABSTRACT:

In this paper, the results of a series of numerical simulations had been carried out to show the distribution of changes of stress field when a cluster array is set after hydraulic fracture. Simulations were performed with Code_Bright (Olivella et al., 1994; Olivella et al., 1996) a finite element method program capable to perform fully coupled thermos-hydro-mechanical analysis of geological media. Pre-process and post-process were carried out via GID® program, an adaptatively numerical simulator widely used in science and engineering. Main simulation conditions involve 2D plane strain analysis, reservoir is considered linear elastic and far field stresses are simulated for different anisotropic conditions. Also, different cluster separation was simulated to study the changes in stress field magnitude and direction. Results indicates, a rotation of minimum horizontal stresses at the neighborhood of the stage. Additionally, depending of the applied fracture pressure,

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