A Comparative Analysis of Rock Properties and Fracture Conductivity in Shale Plays
- Cody Kainer (Texas A&M University) | Dante Guerra (Texas A&M University) | D. Zhu (Texas A&M University) | A. D. Hill (Texas A&M University)
- Document ID
- Society of Petroleum Engineers
- SPE Hydraulic Fracturing Technology Conference and Exhibition, 24–26 January, The Woodlands, Texas, USA
- Publication Date
- Document Type
- Conference Paper
- 2017. Society of Petroleum Engineers
- 4.1 Processing Systems and Design, 4.1.2 Separation and Treating, 1.2.3 Rock properties, 4 Facilities Design, Construction and Operation, 0.2 Wellbore Design, 2 Well completion, 2.5.2 Fracturing Materials (Fluids, Proppant), 2.4 Hydraulic Fracturing
- mechanical properties, conductivity, correlation
- 4 in the last 30 days
- 633 since 2007
- Show more detail
- View rights & permissions
|SPE Member Price:||USD 9.50|
|SPE Non-Member Price:||USD 28.00|
To gain understanding of the mechanisms and rock properties which dominate fracture conductivity generation and decline, fracture conductivity behavior was investigated in several shale reservoirs in the laboratory to identify the main parameters that control the fracture conductivity. The comprehensive study investigated the conductivity behaviors of four shale plays, the Barnett, Fayetteville, Marcellus and Eagle Ford, by testing fracture conductivity as a function of closure stress using collected outcrop rock samples. Conductivity of fractured rock samples are measured using a modified API RP 61 procedure. In addition to conductivity, a plethora of rock properties such as Young's modulus, Poisson's ratio, Brinell hardness, rock brittleness, and mineralogy are measured corresponding to each conductivity test sample. Other parameters considered in this study include proppant mesh size, proppant concentration, and fracture topography to see the resulting impact on conductivity. With all measurements, a multivariate analysis is carried out with the goal of seeking a correlation between fracture conductivity and the influential rock properties and treatment parameters. All results are cross-compared to identify similarities and differences between formations as well as the most important parameters influencing fracture conductivity relative to each formation.
The results indicate a positive trend between both Brinell hardness and Young's Modulus with fracture conductivity. Increased fracture face surface roughness is also found to have an overall decrease in conductivity in propped fractures. The influential parameters are different for different shale plays. Some parameters are more important in one formation but less influential in others. The observations are integrated into a preliminary simple correlation for conductivity behavior. The observations and results from this study clarify the similarity and differences in varying shale plays.
|File Size||2 MB||Number of Pages||20|
Barree, R.D., Miskimins, J.L., Conway, M.W. 2016. Generic Correlations for Proppant Pack Conductivity. Paper presented at the SPE Hydraulic Fracturing Technology Conference, The Woodlands, Texas, USA. Society of Petroleum Engineers. DOI: 10.2118/179135-MS.
Cooke, C. E. (1973, September 1). Conductivity of Fracture Proppants in Multiple Layers. Society of Petroleum Engineers. doi:10.2118/4117-PA
Enriquez-Tenorio, O., Knorr, A., Zhu, D. 2016. Relationships between Mechanical Properties and Fracturing Conductivity for the Eagle Ford Shale. Paper presented at the SPE Asia Pacific Hydraulic Fracturing Conference 2016, Beijing, China. Society of Petroleum Engineers. DOI: 10.2118/181858-MS.
Harpel, J.M., Barker, L.B., Fontenot, J.M. 2012. Case History of the Fayetteville Shale Completions. Paper presented at the SPE Hydraulic Fracturing Technology Conference, The Woodlands, Texas, USA. Society of Petroleum Engineers. DOI: 10.2118/152621-MS.
Passey, Q.R., Bohacs, K.M., Esch, W.L., Klimentidis, R., Sinha, S. (2010). From Oil-Prone Source Rock to Gas-Producing Shale Reservoir &- Geologic and Petrophysical Characterization of Unconventional Shale-Gas Reservoirs. CPS/SPE International Oil & Gas Conference and Exhibition. Beijing, China. Copyright 2010, Society of Petroleum Engineers.
Rickman, R., Mullen, M. J., Petre, J. E., Grieser, W. V., & Kundert, D. (2008, January 1). A Practical Use of Shale Petrophysics for Stimulation Design Optimization: All Shale Plays Are Not Clones of the Barnett Shale. Society of Petroleum Engineers. doi:10.2118/115258-MS
Sone, H., and M. D. Zoback, (2013). Mechanical properties of shale gas reservoir rocks — Part 2: Ductile creep, brittle strength, and their relation to the elastic modulus. Geophysics, 78(5), D393-D402. DOI: 10.1190/geo2013-0050.1.
Zhang, J., Kamenov, A., Hill, A.D. 2014. Laboratory Measurement of Hydraulic-Fracture Conductivities in the Barnett Shale. SPE Production & Operations. DOI: 10.2118/163839-PA