EOR Potential for Lean Gas Reinjection in Zipper Fracs in Liquid-Rich Basins
- Oluwanifemi Akinluyi (University of Tulsa) | Randy Hazlett (University of Tulsa)
- Document ID
- Society of Petroleum Engineers
- SPE Improved Oil Recovery Conference, 11-13 April, Tulsa, Oklahoma, USA
- Publication Date
- Document Type
- Conference Paper
- 2016. Society of Petroleum Engineers
- 5.2 Reservoir Fluid Dynamics, 4 Facilities Design, Construction and Operation, 1.6 Drilling Operations, 7.3.3 Project Management, 5 Reservoir Desciption & Dynamics, 5.7.2 Recovery Factors, 5.4.2 Gas Injection Methods, 5.8.4 Shale Oil, 5.4 Enhanced Recovery, 5.8 Unconventional and Complex Reservoirs, 4.1.2 Separation and Treating, 5.7 Reserves Evaluation, 1.6.6 Directional Drilling, 5.4 Enhanced Recovery, 4.6 Natural Gas, 7 Management and Information, 4.1 Processing Systems and Design, 7.3 Strategic Planning and Management, 4.6 Natural Gas
- recycle, unconventional, EOR, liquids, zipper
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Production from liquid-rich shale has become an important contributor to domestic production in the United States, but recovery factors are low. Enhanced Oil Recovery (EOR) methods require injectivity and interwell communication on reasonable time scales. We conduct a feasibility study for the application of recycled lean gas injection to displace reservoir fluids between zipper fracs in liquid-rich shales.
Using new analytical solutions to the Diffusivity equation for arbitrarily-oriented line sources/sinks plus superposition, we analyze the time for inter-fracture communication development, i.e. interference, and productivity index for both classical bi-wing fractures in a zipper configuration and complex fracture networks. We are able to map both pressure and pressure temporal derivative as a function of time and space for production and/or injection from parallel motherbores under the infinite conductivity wellbore and fracture assumption. The infinite conductivity assumption could be later relaxed for more general cases.
We couch the results in terms of geometrical spacing requirement for both horizontal wells and stimulation treatments to achieve reasonable time frames for inter-fracture communication and sweep for parameters typical of various shale plays. We further analyze whether spacing currently considered for primary production is sufficient for direct implementation of EOR or if current practice should be modified with EOR in the field development plan.
|File Size||4 MB||Number of Pages||17|
Barree, R. D., Cox, S. A., Miskimins, J. L., Gilbert, J. V., & Conway, M. W. (2014, February 4). Economic Optimization of Horizontal Well Completions in Unconventional Reservoirs. Society of Petroleum Engineers. doi:10.2118/168612-MS
Datta-Gupta, A., Xie, J., Gupta, N., King, M. J., & Lee, W. J. (2011, July 1). Radius of Investigation and its Generalization to Unconventional Reservoirs. Society of Petroleum Engineers. doi:10.2118/0711-0052-JPT
Fisher, M. K., Heinze, J. R., Harris, C. D., Davidson, B. M., Wright, C. A., & Dunn, K. P. (2004, January 1). Optimizing Horizontal Completion Techniques in the Barnett Shale Using Microseismic Fracture Mapping. Society of Petroleum Engineers. doi:10.2118/90051-MS
Hazlett, R. D. and Babu, D. K. 2013. Discrete Wellbore and Fracture Productivity Modeling for Unconventional Wells and Unconventional Reservoirs. SPE J, 19 (1): 19&-33 http://dx.doi.org/10.2118/159379-PA.
Jacobs, T (2014). The Shale Evolution: Zipper Fracture Takes Hold. Journal of Petroleum Technology, 66 (10): 60&-67. http://dx.doi.org/10.2118/1014&-0060-JPT.
Joshi Sada (2014). EOR: Next Frontier for Unconventional Oil. Journal of Petroleum Technology, 66 (6): 20&-22. http://dx.doi.org/10.2118/0614-0020-JPT
Kuchuk, F. J. (2009, January 1). Radius of Investigation for Reserve Estimation From Pressure Transient Well Tests. Society of Petroleum Engineers. doi:10.2118/120515-MS