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Numerical simulation of CO 2 huff-n-puff in complex fracture networks of unconventional liquid reservoirs
- Source :
- Journal of Natural Gas Science and Engineering. 31:481-492
- Publication Year :
- 2016
- Publisher :
- Elsevier BV, 2016.
-
Abstract
- Horizontal drilling and hydraulic fracturing produce Unconventional Liquid Reservoirs (ULRs) economically. One of the characteristics of the ULRs is high production declining rate, and thus enhanced oil recovery techniques such as Huff-n-Puff will ensue. In addition, the existence of complex fracture network has been proven by both field and simulation work. This study investigated the potential of CO 2 huff-n-puff in ULRs with complex fracture networks. Two fracture characterization techniques for complex fracture network such as fractal-based, and microseismic-based were applied to reduce uncertainties of fracture networks and thus improve the accuracy of simulation input. In order to study complex CO 2 recovery mechanism, lab-measured data was upscaled to the field-scale, and then used for evaluating production performance of a simple fracture network. Detailed sensitivity analysis showed that diffusion in the field scale is negligible compared with other recovery mechanisms such as oil swelling, gas expansion, viscosity reduction, etc. The following comparison between dual continuum and the explicit fracture modeling approaches highlights the importance of heterogeneity due to the explicit fractures. Dual continuum models yields less accurate pressure behavior than explicit discrete fracture models even though production behavior could be history matched.
- Subjects :
- Discrete fracture
Computer simulation
020209 energy
Directional drilling
Energy Engineering and Power Technology
Complex fracture
02 engineering and technology
Mechanics
Geotechnical Engineering and Engineering Geology
Fuel Technology
Hydraulic fracturing
020401 chemical engineering
0202 electrical engineering, electronic engineering, information engineering
Recovery mechanism
Simple fracture
Geotechnical engineering
Enhanced oil recovery
0204 chemical engineering
Geology
Subjects
Details
- ISSN :
- 18755100
- Volume :
- 31
- Database :
- OpenAIRE
- Journal :
- Journal of Natural Gas Science and Engineering
- Accession number :
- edsair.doi...........ec51bc1f9c3d1de464d1065ba07ff452