Hybrid Coupled Discrete-Fracture And Continuum Models For Low Permeability Reservoir Simulation
J. Xu, C. Bailian, Z. Wei, S. Baojiang and W. Shi
Event name: ECMOR XVI - 16th European Conference on the Mathematics of Oil Recovery
Session: ECMOR XVI Poster Session 2
Publication date: 03 September 2018
Info: Extended abstract, PDF ( 3.73Mb )
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It is an important and hot issue to simulate flows in tight reservoirs with complex fractures. Large work has been done to study the transport between the matrix and fracture. However, pseudo-steady-state transfer encounters difficulty due to extremely low matrix permeability for tight reservoirs. Transient transfer shape factor between matrix and fracture should be considered. Considering the transient transfer, a simulation workflow is developed using Discrete-Fracture and Continuum Models, i.e., embedded-discrete-fracture model (EDFM) and dual porosity (DP) model. We consider the SRV region and USRV region respectively. In the SRV region, the EDFM+DP model is used while for USRV, the single porosity model is used. The DP concept allows the hybrid model to handle the transient transfer between matrix and secondary fracture in SRV region. The model is verified by comparing with EDFM+MINC model. The effect of some parameters on oil production are analyzed. The prediction capacity of the new hybrid model is better when replacing pseudo steady state transfer to transient transfer between matrix and secondary fracture in SRV region.