Multi-Porosity Simulation of Unconventional Reservoirs
- 5 November 2013
- proceedings article
- Published by Society of Petroleum Engineers (SPE)
Abstract
Today, most unconventional reservoir simulations are performed within a single-porosity framework. Very fine, high permeability gridblocks are used to represent the discrete fractures. Geometric spacing of blocks away from the fractures is necessary to capture the pressure gradients and simultaneously keep the number of gridblocks manageable. Without further subgridding the effects of desorption, diffusion, and transport through macro- and micro- fractures must be lumped resulting in a possible loss of transient fidelity. Yet these processes readily lend themselves to analysis with additional porosity types where the transport sequence can be preserved and studied. In this paper, we use a full production simulator to explore the advantages and disadvantages of simulating unconventional reservoirs with one-, two-, three-, and four-porosity systems. Kerogen, macro-fractures, micro-fractures, and an inorganic matrix are represented directly in the four-porosity system.Keywords
This publication has 23 references indexed in Scilit:
- Flexible and Efficient N-Porosity, Full-Featured Simulator Design, and ApplicationPublished by Society of Petroleum Engineers (SPE) ,2013
- Beyond Dual-Porosity Modeling for the Simulation of Complex Flow Mechanisms in Shale ReservoirsPublished by Society of Petroleum Engineers (SPE) ,2013
- Effect of Discontinuous Microfractures on Ultratight Matrix Permeability of a Dual-Porosity MediumSPE Reservoir Evaluation & Engineering, 2012
- Shale-Gas Permeability and Diffusivity Inferred by Improved Formulation of Relevant Retention and Transport MechanismsTransport in Porous Media, 2010
- Reservoir Modeling in Shale-Gas ReservoirsSPE Reservoir Evaluation & Engineering, 2010
- Pore Networks and Fluid Flow in Gas ShalesPublished by Society of Petroleum Engineers (SPE) ,2009
- Effective Correlation of Apparent Gas Permeability in Tight Porous MediaTransport in Porous Media, 2009
- Fracture Design Considerations in Horizontal Wells Drilled in Unconventional Gas ReservoirsPublished by Society of Petroleum Engineers (SPE) ,2009
- Production-Data Analysis of Single-Phase (Gas) Coalbed-Methane WellsSPE Reservoir Evaluation & Engineering, 2007
- Dynamic Gas Slippage: A Unique Dual-Mechanism Approach to the Flow of Gas in Tight FormationsSPE Formation Evaluation, 1986