Successful Hybrid Slickwater-Fracture Design Evolution: An East Texas Cotton Valley Taylor Case History
- Patrick J. Handren (Denbury Resources Inc.) | Terrence T. Palisch (CARBO Ceramics, Inc.)
- Document ID
- Society of Petroleum Engineers
- SPE Production & Operations
- Publication Date
- August 2009
- Document Type
- Journal Paper
- 415 - 424
- 2009. Society of Petroleum Engineers
- 4.1.2 Separation and Treating, 5.2 Reservoir Fluid Dynamics, 5.6.5 Tracers, 2.4.3 Sand/Solids Control, 2.5.2 Fracturing Materials (Fluids, Proppant), 4.6 Natural Gas, 2.7.1 Completion Fluids, 4.2.3 Materials and Corrosion, 1.6.9 Coring, Fishing, 2 Well Completion, 1.2.3 Rock properties, 3.2.3 Hydraulic Fracturing Design, Implementation and Optimisation, 2.5.1 Fracture design and containment
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- 1,123 since 2007
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As the development of tight/unconventional and partially depleted gas reservoirs has increased, so has the demand for more-innovative hydraulic-fracture designs. Operators are increasingly placing proppant with slickwater, linear gel, or hybrid fracture designs. While the benefits of these designs typically are attributed to a reduction in gel damage of the proppant pack, many operators mistakenly believe that the resulting fractures are not conductivity-limited.
Because few (if any) models on the market can adequately model the propagation of a slickwater fracture along with the associated proppant transport and deposition, it becomes difficult to optimize these fracture designs. This has led many operators to assume incorrectly that only small-diameter sand or resin-coated sand may be placed in these types of designs, and that these products supply ample flow capacity.
However, one east Texas operator has combined insight into proppant transport with an appropriate understanding of realistic proppant-pack conductivity to develop a novel, hybrid slickwater-fracture design. This design has allowed the placement of larger-diameter, higher-conductivity proppant in fractures that many believed could not be placed in fractures either operationally or economically. Additionally, this operator has developed a unique pumping strategy to place the highest-conductivity proppant in portions of the fracture where it provides the most value.
This paper will present a case history of these new hybrid slickwater-fracture designs in this operator's east Texas Cotton Valley Taylor (CV-T) completions. The design theory and sequential improvements will be documented, including larger-diameter, higher-strength proppants, and a novel placement design. Field results from the first six wells fractured will be presented, showing substantial increases in gas production compared with similar offset completions. Economics will also be shown to illustrate the tremendous value added to completions using this hybrid fracture design.
|File Size||807 KB||Number of Pages||9|
Barree, R.D., Cox, S.A., Barree, V.L., and Conway, M.W. 2003. Realistic Assessment of Proppant PackConductivity for Material Selection. Paper SPE 84306 presented at the SPEAnnual Technical Conference and Exhibition, Denver, 5-8 October. doi:10.2118/84306-MS.
Cobb, S.L. and Farrell, J.J. 1986. Evaluation of Long-Term ProppantStability. Paper SPE 14133 presented at the SPE International Meeting onPetroleum Engineering, Beijing, 17-20 March. doi: 10.2118/14133-MS.
Core Lab. 2009. Stim-Lab Proppant and Fluid Consortia, http://www.corelab.com/pe/stimlab/default.aspx.
Flowers, J.R., Hupp, M.T., and Ryan, J.D. 2003. The Results of Increased FractureConductivity on Well Performance in a Mature East Texas Gas Field. PaperSPE 84307 presented at the SPE Annual Technical Conference and Exhibition,Denver, 5-8 October. doi: 10.2118/84307-MS.
Forchheimer, P.F. 1901. Wasserbewegung durch Boden. Zeitschrift desVereines deutscher Ingenieure 45 (5): 1781-1788.
Hahn, G. 1986. How Long Will It Prop? Drilling, The WellsitePublication 47 (6): 596. Dallas: Energy Publications.
Handren, P., Pearson, C.M., Kullman, J. et al. 2001. The Impact of Non-Darcy Flow onProduction From Hydraulically Fractured Gas Wells. Paper SPE 67299presented at the SPE Production and Operations Symposium, Oklahoma City,Oklahoma, USA, 24-27 March. doi: 10.2118/67299-MS.
Huckabee, P., Vincent, M.C., Foreman, J., and Spivey, J.P. 2005. Field Results: Effect of ProppantStrength and Sieve Distribution Upon Well Productivity. Paper SPE 96559presented at the SPE Annual Technical Conference and Exhibition, Dallas, 9-12October. doi: 10.2118/96559-MS.
ISO 13503-5:2006, Petroleum and natural gas industries--Completion fluidsand materials--Part 5, Procedures for measuring the long-term conductivity ofproppants. 2006. Geneva, Switzerland: ISO.
Kerns, L.R, Perkins, T.K. and Wyant, R.E. 1959. The Mechanics of Sand Movement inFracturing. J. Pet Tech 11 (7): 55-57. SPE-1108-G. doi:10.2118/1108-G.
Milton-Tayler, D. 1993. Non-Darcy Gas Flow: From LaboratoryData to Field Prediction. Paper SPE 26146 presented at the SPE GasTechnology Symposium, Calgary, 28-30 June. doi: 10.2118/26146-MS.
Montgomery, C.T. and Steanson, R.E. 1985. Proppant Selection: The Key toSuccessful Fracture Stimulation (Revised). J. Pet Tech37 (12): 2163-2172. SPE-12616-PA. doi: 10.2118/12616-PA.
Palisch, T., Duenckel, R., Bazan, L., Heidt, H.J., and Turk, G. 2007. Determining Realistic FractureConductivity and Understanding Its Impact on Well Performance--Theory and FieldExamples. Paper SPE 106301 presented at the SPE Hydraulic FracturingTechnology Conference, College Station, Texas, USA, 29-31 January. doi:10.2118/106301-MS.
Stim-Lab Proppant and Fluid Consortia. 2006. http://www.corelab.com/StimLab/consortia/Consortia.aspx.
Vincent, M.C. 2002. ProvingIt--A Review of 80 Published Field Studies Demonstrating the Importance ofIncreased Fracture Conductivity. Paper SPE 77675 presented at the SPEAnnual Technical Conference and Exhibition, San Antonio, Texas, USA, 29September-2 October. doi: 10.2118/77675-MS.
Vincent, M.C. 2004. Field TrialResults: Investigating the Benefits of Increased Fracture Conductivity in theLow-Permeability Sandstones of the Pinedale Anticline, Western Wyoming.Paper SPE 90620 presented at the SPE Annual Technical Conference andExhibition, Houston, 26-29 September. doi: 10.2118/90620-MS.