Optimizing Fracture Spacing and Sequencing in Horizontal-Well Fracturing
- Nicolas P. Roussel (University of Texas at Austin) | Mukul M. Sharma (University of Texas at Austin)
- Document ID
- Society of Petroleum Engineers
- SPE Production & Operations
- Publication Date
- May 2011
- Document Type
- Journal Paper
- 173 - 184
- 2011. Society of Petroleum Engineers
- 4.1.2 Separation and Treating, 5.8.2 Shale Gas, 2.2.2 Perforating
- stress reorientation, fracture spacing, horizontal well, sequential fracturing
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- 3,777 since 2007
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Horizontal wells with multiple fractures are now commonly used in unconventional (low-permeability) gas reservoirs. The spacing between perforations and the number and orientation of transverse fractures all have a major impact on well production.
The opening of propped fractures results in the redistribution of local Earth stresses. In this paper, the extent of stress reversal and reorientation has been calculated for fractured horizontal wells using a 3D numerical model of the stress interference induced by the creation of one or more propped fractures. The results have been analyzed for their impact on simultaneous and sequential fracturing of horizontal wells.
Our results demonstrate that a transverse fracture initiated from a horizontal well may deviate away from the previous fracture. The effect of the reservoir?s mechanical properties on the spatial extent of stress reorientation caused by an opened crack has been quantified. The paper takes into account the presence of layers that bound the pay zone but have mechanical properties different from those of the pay zone. The fracture vertical growth into the bounding layers is also examined.
It is shown that stress interference, or reorientation, increases with the number of fractures created and depends on the sequence of fracturing. Three fracturing sequences are investigated for a typical field case in the Barnett shale: (a) consecutive fracturing, (b) alternative fracturing, and (c) simultaneous fracturing of adjacent wells. The numerical calculation of the fracture spacing required to avoid fracture deviation during propagation, for all three fracturing techniques, demonstrates the potential advantages of alternate fracture sequencing and zipper fracs to improve the performance of stimulation treatments in horizontal wells.
|File Size||1 MB||Number of Pages||12|
Cheng, Y. 2009. Boundary Element Analysis of the Stress Distribution aroundMultiple Fractures: Implications for the Spacing of Perforation Clusters ofHydraulically Fractured Horizontal Wells. Paper SPE 125769 presented at the SPEEastern Regional Meeting, Charleston, West Virginia, USA, 23-25 September. doi: 10.2118/125769-MS.
Cipolla, C.L., Lolon, E.P., Mayerhofer, M.J., and Warpinski, N.R. 2009.Fracture Design Considerations in Horizontal Wells Drilled in UnconventionalGas Reservoirs. Paper SPE 119366 presented at the SPE Hydraulic FracturingTechnology Conference, The Woodlands, Texas, USA, 19-21 January. doi: 10.2118/119366-MS.
Fisher, M.K., Heinze, J.R., Harris, C.D., Davidson, B.M., Wright, C.A., andDunn, K.P. 2004. Optimizing Horizontal Completion Techniques in the BarnettShale Using Microseismic Fracture Mapping. Paper SPE 90051 presented at the SPEAnnual Technical Conference and Exhibition, Houston, 26-29 September. doi: 10.2118/90051-MS.
Ketter, A.A., Daniels, J.L., Heinze, J.R., and Waters, G. 2008. A FieldStudy Optimizing Completion Strategies for Fracture Initiation in Barnett ShaleHorizontal Wells. SPE Prod & Oper 23 (3): 373-378.SPE-103232-PA. doi:10.2118/103232-PA.
Maxwell, S.C., Urbancik, T.I., Steinsberger, N.P., and Zinno, R. 2002.Microseismic Imaging of Hydraulic Fracture Complexity in the Barnett Shale.Paper SPE 77440 presented at the SPE Annual Technology Conference andExhibition, San Antonio, Texas, USA, 29 September-2 October. doi: 10.2118/77440-MS.
Mayerhofer, M.J., Lolon, E.P., Warpinski, N.R., Cipolla, C.L., Walser, D.,and Rightmire, C.M. 2010. What Is Stimulated Reservoir Volume? SPE Prod& Oper 25 (1): 89-98. SPE-119890-PA. doi: 10.2118/119890-PA.
Mutalik, P.N. and Gibson, B. 2008. Case History of Sequential andSimultaneous Fracturing of the Barnett Shale in Parker County. Paper SPE 116124presented at the SPE Annual Technical Conference and Exhibition, Denver, 21-24September. doi:10.2118/116124-MS.
Olson, J.E. 2008. Multi-fracture Propagation Modeling: Application tohydraulic fracturing in shales and tight gas sands. Paper ARMA 08-327 presentedat the 42nd US Rock Mechanics Symposium, San Francisco, 29 June -2 July.
Olson, J.E. and Dahi-Taleghani, A. 2009. Modeling Simultaneous Growth ofMultiple Hydraulic Fractures and Their Interaction With Natural Fractures.Paper SPE 119739 presented at the SPE Hydraulic Fracturing TechnologyConference, The Woodlands, Texas, USA, 19-21 January. doi: 10.2118/119739-MS.
Palmer, I.D. 1993. Induced Stresses Due to Propped Hydraulic Fracture inCoalbed Methane Wells. Paper SPE 25861 presented at the Low PermeabilityReservoirs Symposium, Denver, 26-28 April. doi: 10.2118/25861-MS.
Palisch, T.T., Vincent, M.C., and Handren, P.J. 2008. SlickwaterFracturing--Food for Thought. Paper SPE 115766 presented at the SPE AnnualTechnical Conference and Exhibition, Denver, 21-24 September. doi: 10.2118/115766-MS.
Roussel, N.P. and Sharma, M.M. 2010. Quantifying Transient Effects inAltered-Stress Refracturing of Vertical Wells. SPE J. 15(3): 770-782. SPE-119522-PA. doi:10.2118/119522-PA.
Siebrits, E., Elbel, J.L., Detourney, E., Detournay-Piette, C.,Christianson, M., Robinson, B.M., and Diyashev, I.R. 1998. Parameters AffectingAzimuth and Length of a Secondary Fracture During a Refracture Treatment. PaperSPE 48928 presented at the SPE Annual Technical Conference and Exhibition, NewOrleans, 27-30 September. doi:10.2118/48928-MS.
Singh, V., Roussel, N.P., and Sharma, M.M. 2008. Stress Reorientation AroundHorizontal Wells. Paper SPE 116092 presented at the SPE Annual TechnicalConference and Exhibition, Denver, 21-24 September. doi: 10.2118/116092-MS.
Sneddon, I.N. and Elliot, H.A. 1946. The Opening of a Griffith Crack underInternal Pressure. Quarterly of Applied Mathematics 4 (3):262-267.
Sneddon, I.N. 1946. The Distribution of Stress in the Neighbourhood of aCrack in an Elastic Solid. Proc. R. Soc. Lond. A 187(1009): 229-260.
Soliman, M.Y. and Boonen, P. 1997. Review of Fractured Horizontal WellsTechnology. Paper SPE 36289 presented at the Abu Dhabi International PetroleumExhibition and Conference, Abu Dhabi, UAE, 13-16 October. doi: 10.2118/36289-MS.
Soliman, M.Y. and Adams, D. 2004. Geo-Mechanics Aspects of MultipleFracturing of Horizontal and Vertical Wells. Paper SPE 86992 presented at theSPE International Thermal Operations and Heavy Oil Symposium and WesternRegional Meeting, Bakersfield, California, USA, 16-18 March. doi: 10.2118/86992-MS.
Waters, G., Dean, B., Downie, R., Kerrihard, K., Austbo, L., and McPherson,B. 2009. Simultaneous Hydraulic Fracturing of Adjacent Wells in the WoodfordShale. Paper SPE 119635 presented at the SPE Hydraulic Fracturing TechnologyConference, The Woodlands, Texas, USA, 19-21 January. doi: 10.2118/119635-MS.
Weng, X. and Siebrits, E. 2007. Effect of Production-Induced Stress Field onRefracture Propagation and Pressure Response. Paper SPE 106043 presented at theSPE Hydraulic Fracturing Technology Conference, College Station, Texas, USA,29-31 January. doi:10.2118/106043-MS.