Shale Frac Designs Move to Just-Good-Enough Proppant Economics
- Howard Melcher (Liberty Oilfield Services) | Michael Mayerhofer (Liberty Oilfield Services) | Karn Agarwal (Liberty Oilfield Services) | Ely Lolon (Liberty Oilfield Services) | Oladapo Oduba (Liberty Oilfield Services) | Jessica Murphy (Liberty Oilfield Services) | Ray Ellis (Liberty Oilfield Services) | Kirk Fiscus (Liberty Oilfield Services) | Robert Shelley (RF Shelley LLC) | Leen Weijers (Liberty Oilfield Services)
- Document ID
- Society of Petroleum Engineers
- SPE Hydraulic Fracturing Technology Conference and Exhibition, 4-6 February, The Woodlands, Texas, USA
- Publication Date
- Document Type
- Conference Paper
- 2020. Society of Petroleum Engineers
- Regional Sand, Economics, Conductivity, Frac Design, Proppant
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- 654 since 2007
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Selecting appropriate proppants is an important part of hydraulic fracture completion design. Proppant selection choices have dramatically increased in recent years as regional sands have become the proppant of choice in many liquid-rich shale plays. But are these new proppants the best long-term choices to maximize production? Do they provide the best well economics?
The paper presents a brief historical perspective on proppant selection followed by various detailed studies of how different proppant types have been performing in various unconventional basins (Williston, Permian, Eagle Ford, Powder River and DJ) along with economic analyses. As the shale revolution pushed into lower-quality reservoirs, the concept of dimensionless conductivity has pushed our industry to use ever lower-quality materials – away from ceramics and resin-coated proppant to white sand in some Rocky Mountain plays and more recently from white sand to regional sand in the Permian and Eagle Ford plays.
Further, we compare early-to late-time production response and economics in liquid-rich wells where proppant type changed. The performance of various proppant types and mesh sizes is evaluated using a combination of different techniques, including big data multi-variate statistics, lab conductivity testing, detailed fracture and reservoir modeling, as well as direct well group comparisons. The results of these techniques are then combined with economic analyses to provide a perspective on proppant selection criteria. The comparisons are anchored to permeability estimates from production history matching and DFITs and thousands of wellsite proppant conductivity tests to determine dimensionless conductivity estimates that best approach what is obtained in the field.
Proppant selection is typically based on crush resistance to stress loading and fracture conductivity under various flow conditions while having the lowest possible cost. However, dimensionless fracture conductivity is the main driver of well performance as it relates to proppant selection since it includes the relationship of fracture conductivity provided by the proppant relative to the actual flow capacity of the rock (the product of permeability and effective fracture length), which is supported by the production analyses in the paper. The paper shows how much fracture conductivity is adequate for a given effective fracture length and reservoir permeability and then looks at the economics of achieving this "just-good -enough" target conductivity, either through less proppant mass with higher-cost proppants or more proppant mass with-lower cost proppants, as well as mesh size considerations.
This paper does not rely on a single technique for proppant selection but uses a combination of various data sources, analysis techniques and economic criteria to provide a more holistic approach to proppant selection.
|File Size||2 MB||Number of Pages||27|
Agarwal, K., Kegel, J., Ballard, B., Lolon, E., Mayerhofer, M., Weijers, L., Melcher, H., Compton, S., Turner, P. (2019, January 29). Evolving Completion Designs to Optimize Well Productivity from a Low Permeability Oil Sandstone Turner Reservoir in the Powder River Basin—One Operator's Experience. Society of Petroleum Engineers. doi:10.2118/194350-MS
Arps, J. J. (1945, December 1). Analysis of Decline Curves. Society of Petroleum Engineers. doi:10.2118/945228-G
Brannon, H. D., Malone, M. R., Rickards, A. R., Wood, W. D., Edgeman, J. R., & Bryant, J. L. (2004, September 26). Maximizing Fracture Conductivity with Proppant Partial Monolayers: Theoretical Curiosity or Highly Productive Reality? Society of Petroleum Engineers. doi:10.2118/90698-MS
Crafton, J. W., Herndon, D., & Kaul, T. (2014, April 17). High Performance Ceramic in the Bakken. Society of Petroleum Engineers. doi:10.2118/169567-MS
Fisher, M. K., Wright, C. A., Davidson, B. M., Goodwin, A. K., Fielder, E. O., Buckler, W. S., & Steinsberger, N. P. (2002, January 1). Integrating Fracture Mapping Technologies to Optimize Stimulations in the Barnett Shale. Society of Petroleum Engineers. doi:10.2118/77441-MS
Flowers, J. R., Guetta, D. R., Stephenson, C. J., Jeremie, P., & d' Arco, N. (2014, February 4). A Statistical Study of Proppant Type vs. Well Performance in the Bakken Central Basin. Society of Petroleum Engineers. doi:10.2118/168618-MS
Griffin, L. G., Pearson, C. M., Strickland, S., McChesney, J., Wright, C. A., Mayer, J., … Weijers, L. (2013, September 30). The Value Proposition for Applying Advanced Completion and Stimulation Designs to the Bakken Central Basin. Society of Petroleum Engineers. doi:10.2118/166479-MS
Hu, K., Schmidt, A., Barhaug, J., Wong, J., Tian, J., & Hall, B. E. (2015, September 28). Sand, Resin-Coated Sand or Ceramic Proppant? The Effect of Different Proppants on the Long-Term Production of Bakken Shale Wells. Society of Petroleum Engineers. doi:10.2118/174816-MS
Mao, D., Miller, D. S., Karanikas, J. M., Lake, E. A., Fair, P. S., & Liu, X. (2017, December 1). Influence of Finite Hydraulic-Fracture Conductivity on Unconventional Hydrocarbon Recovery with Horizontal Wells. Society of Petroleum Engineers. doi:10.2118/187947-PA
Mayerhofer, M., Oduba, O., Agarwal, K., Melcher, H., Lolon, E., Bartell, J., & Weijers, L. (2017, October 9). A Cost/Benefit Review of Completion Choices in the Williston Basin Using a Hybrid Physics-Based Modeling/Multi-Variate Analysis Approach. Society of Petroleum Engineers. doi:10.2118/187254-MS
Weijers, L., Wright, C., Mayerhofer, M., Pearson, M., Griffin, L., & Weddle, P. (2019, January 29). Trends in the North American Frac Industry: Invention through the Shale Revolution. Society of Petroleum Engineers. doi:10.2118/194345-MS
Williams, R., Artola, P., Salinas, J., Mirakyan, A., MacKay, B., Hoefer, A., Williamson, B. (2019, September 23). An Early Production Comparison of Northern White Sand and Regional Sand in the Permian Basin. Society of Petroleum Engineers. doi:10.2118/196048-MS