A Simulation Case Study of Gas Injection Pilot in Eagle Ford
- J. Brandon Rogers (Murphy Oil Corporation) | Basar Basbug (NITEC LLC) | Tuba Firincioglu (NITEC LLC) | Chet Ozgen (NITEC LLC)
- Document ID
- Society of Petroleum Engineers
- SPE Improved Oil Recovery Conference, 31 August - 4 September, Tulsa, Oklahoma, USA
- Publication Date
- Document Type
- Conference Paper
- 2020. Society of Petroleum Engineers
- 5.5 Reservoir Simulation, 3 Production and Well Operations, 5.3 Reservoir Fluid Dynamics, 5 Reservoir Desciption & Dynamics, 5.4.2 Gas Injection Methods, 4.1 Processing Systems and Design, 5.8.4 Shale Oil, 4 Facilities Design, Construction and Operation, 2 Well completion, 5.4 Improved and Enhanced Recovery, 5.3.2 Multiphase Flow, 4.1.2 Separation and Treating, 2.4 Hydraulic Fracturing
- Reservoir Modeling, Unconventional EOR, Eagle Ford Shale
- 73 in the last 30 days
- 75 since 2007
- Show more detail
- View rights & permissions
|SPE Member Price:||USD 5.00|
|SPE Non-Member Price:||USD 28.00|
This paper focuses on simulation modeling of a gas injection pilot operated in the Eagle Ford Shale play. The main objective of this case study is to understand the flow mechanisms in the reservoir due to hydraulic fracturing of multiple wells and gas injection operations.
A dual porosity numerical reservoir simulation model coupled with geo-mechanics was built to investigate the hydraulic fracturing and flow dynamics of the pilot area using a sophisticated numerical reservoir simulator. The methodology used in this study integrates the hydraulic fracturing process, multi-phase flow and geo-mechanics within the reservoir simulation. In this approach, the change in mean stress for each grid block is implicitly solved together with pressure and the other flow variables using poro-elastic information. Geologic, geo-mechanical and reservoir properties were gathered from the static geo-model. The actual stage-by-stage hydraulic fracture treatment jobs were simulated to investigate the stimulated rock volume (SRV) characteristics of the study wells. The simulation model was calibrated to match the hydraulic fracturing, flow back, depletion and multiple huff and puff cycles. Oil, water and gas production/injection data together with pressure data were matched during calibration. Additional sensitivity runs were performed to examine the potential benefits of gas injection under different operational scenarios.
The results show that the Eagle Ford pilot area is quiet in terms of natural fractures. There is an indication of weak zones that provide preferential connectivity paths for water and gas flow. These weakness points could be related to the lithology or natural fractures. They were defined as easily breakable planar zones in the model. The most important knowledge gained from the calibration of the gas injection period is the establishment of connectivity paths and their poro-elastic behavior during gas injection. The results showed that oil swelling and vaporization of oil into gas are the two mechanisms that impact the huff-n-puff performance. Maintaining most of the injected gas around the huff-n-puff pattern also improves the performance.
|File Size||2 MB||Number of Pages||20|
Atan, S., Ajayi, A., Honarpour, M., Turek, E., Dillenbeck, E., Mock, C., … Pereira, C. (2018, September 24). The Viability of Gas Injection EOR in Eagle Ford Shale Reservoirs. Society of Petroleum Engineers. https://doi.org/10.2118/191673-MS
Carlsen, M., Whitson, C., Dahouk, M. M., Younus, B., Yusra, I., Kerr, E., … Mydland, S. (2019, July 31). Compositional Tracking of a Huff-n-Puff Project in the Eagle Ford. Unconventional Resources Technology Conference. https://doi.org/10.15530/urtec-2019-539.
Fragoso, A., Lopez Jimenez, B. A., Aguilera, R., & Noble, G. (2019, September 23). Matching of Pilot Huff-n-puff Gas Injection Project in the Eagle Ford Shale Using a 3D 3-Phase Multiporosity Numerical Simulation Model. Society of Petroleum Engineers. https://doi.org/10.2118/195822-MS
Gala, D., & Sharma, M. (2018, September 24). Compositional and Geomechanical Effects in Huff-n-Puff Gas Injection IOR in Tight Oil Reservoirs. Society of Petroleum Engineers. https://doi.org/10.2118/191488-MS
Ganjdanesh, R., Yu, W., Torres, M. X. 2019. Huff-N-Puff Gas Injection for Enhanced Condensate Recovery in Eagle Ford. Presented at the SPE Annual Technical Conference and Exhibition, Calgary, Alberta, Canada, 30 September – 2 October. SPE-195996-MS. https://doi.org/10.2118/195996-MS.
Hawthorne, S. B., Miller, J. D., Grabanski, C. B., Sorensen, J. A., Pekot, L. J., Kurz, B. A., Gorecki, C. D., Steadman, E.N. and Harju, J. A. 2017. Measured Crude Oil MMPs with Pure and Mixed CO2, Methane, and Ethane and Their Relevance to Enhanced Oil Recovery from Middle Bakken and Bakken Shales. Presented at SPE Unconventional Resources Conference in Calgary, Alberta, Canada, 15-16 February. SPE-185072-MS. https://doi.org/10.2118/185072-MS.
Hoffman, T. B. 2018. Huff-N-Puff Gas Injection Pilot Projects in the Eagle Ford. Presented at the SPE Canada Unconventional Resources Conference, 13-14 March, Calgary, Alberta, Canada. SPE-189816-MS. https://doi.org/10.2118/189816-MS.
Kanfar, M.S. and Clarkson, C.R. 2017. Factors Affecting Huff-n-Puff Efficiency in Hydraulically-Fractured Tight Reservoirs. Presented at the SPE Unconventional Resources Conference, 15-16 February. SPE-185062-MS. https://doi.org/10.2118/185062-MS.
MacDonald, R.M., Geetan, S.I., Klemin, D., 2017. Dynamic Flow Behavior in Shales Described via DigitalRock Modeling Provides Insight into Gas Injection. Presented at the SPE/AAPG/SEG UnconventionalResources Technology Conference, Austin, Texas, USA, 24-26 July. URTeC: 2671283. https://doi.org/10.15530/URTEC-2017-2671283
Pankaj, P., Mukisa, H., Solovyeva, I., & Xue, H. (2018, August 28). Enhanced Oil Recovery in Eagle Ford: Opportunities Using Huff-n-Puff Technique in Unconventional Reservoirs. Society of Petroleum Engineers. https://doi.org/10.2118/191780-MS