High Resolution Hydraulic Fracture Network Modeling Using Flexible Dual Porosity Dual Permeability Framework
- D. Yang (Chevron Energy Technology Company) | X. Xue (Chevron Energy Technology Company) | J. Chen (Chevron Energy Technology Company)
- Document ID
- Society of Petroleum Engineers
- SPE Western Regional Meeting, 22-26 April, Garden Grove, California, USA
- Publication Date
- Document Type
- Conference Paper
- 2018. Society of Petroleum Engineers
- 5.5 Reservoir Simulation, 5.5.8 History Matching, 2 Well completion, 5.6 Formation Evaluation & Management, 5 Reservoir Desciption & Dynamics, 5.6.9 Production Forecasting, 2.4 Hydraulic Fracturing, 3 Production and Well Operations
- High Resolution Hydraulic Fracture Network, Flexible Dual Porosity Dual Permeability Framework
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Advancement of multistage hydraulic fracturing technology made unconventional reservoirs (UCR) development economically very attractive. Accurate and efficient production forecasts from UCR are challenging because of the complexity of the fracture network. Abstractions inherent in the traditional dual porosity dual permeability (DPDK) model makes it inadequate to simulate UCR. Discrete Fracture Model (DFM) provides better resolution of fracture geometry but it is not widely used in the industry because it is computationally expensive and history matching is difficult to perform.
This paper presents a new option which utilizes the dual medium framework from traditional DPDK modeling and incorporates effects of each fracture explicitly as it is done in the DFM approach. Single medium is used to model the matrix where there is no fracture present, and dual medium is used to model the fracture network and matrix. This method takes advantage of the optimized DPDK feature in existing commercial simulators. In the near wellbore areas where fractures exist, matrix-fracture coupling is calculated using the same equation as the Embedded Discrete Fracture Model (EDFM). Additionally, to increase accuracy, high resolution local grid refinements (LGRs) are adopted at fracture locations. The new option is benchmarked with the existing EDFM tool using synthetic and field cases.
The results of the benchmark studies indicate that high resolution LGR can minimize sensitivity to the resolution of matrix grid. Flexible DPDK framework allow us to utilize existing reservoir simulation workflow for grid property modification with clear and detailed 3D visualization of matrix and fracture through comerically available visualization packages.
The new option provides a precise and efficient method to simulate complex fracture networks. Implementation and integration with other simulation workflows are straightforward since it makes use of existing functionalities and frameworks in a commercial simulator. Potential applications to improve the efficiency of UCR factory operations include automatic probabilistic forecasting, history matching, and optimization.
|File Size||1 MB||Number of Pages||14|
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