Multi-branched growth of fractures in shales for effective reservoir contact: A particle based distinct element modeling study

摘要

The complexity of a stimulated fracture network is important for hydrocarbon extraction from tight shales. Branched-interconnected-complex fracture networks are preferable for a better production due to a larger contact area compared to unconnected-single fractures. The presented numerical modeling study aims for a better understanding of the hydraulic fracturing process in shale formations to eventually achieve these kinds of fracture networks. In this study, a two dimensional particle based distinct element method (DEM) is used to systematically investigate the influence of specific model parameters on the resulting fracture patterns. The applicability of the model is critically discussed and technical measures to increase hydraulic fracture complexity are proposed. (C) 2016 Elsevier B.V. All rights reserved.