Authors: Junlei Wang Yunsheng Wei Yadong Qi
Publish Date: 2016/03/23
Volume: 112, Issue: 3, Pages: 707-736
Abstract
There is a gap between direct discrete fracture network numerical model and conceptual multilinear/porosity analytical model for simulating production performance from fractured unconventional reservoirs The principle focus of this work is on proposing a hybrid model of complexly fractured reservoir by associating fractal theory with multiplefractured configuration The formulation is established on the trilinearflow idealization presented by Brown et al 2009 Our model could account for the heterogeneity of fracture network in stimulated reservoir volume SRV and the arbitrary properties of multiple hydraulic fractures Furthermore a semianalytical solution is correspondingly presented by incorporating Laplace–Fourier transformation and Stehfest numerical inversion based on the principle of pressure superposition The new algorithm integrates multiple trilinearflow solutions for singlefracture hypothesis into a general solution for multifractured horizontal well The second focus is put on verification of the semianalytical solution by comparing with alternative analytical/numerical simulations for two cases a multifractures solution in homogeneity media b multifractures solution in heterogeneity media with fractal characteristic Excellent agreement between alternative simulations and our solutions is achieved Finally several synthetic examples are introduced to illustrate the application of semianalytical solution in the field of pressure transient analysis and discuss the effects of the parameters on transient pressure behavior including fracture number/spacing conductivity fractal characteristic constant and associated anomalousdiffusion constant The model provides a new knowledge and insight into understanding flow behavior in fractured unconventional reservoirs
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