Applications of Self-Degradable Particulate Diverters in Wellbore Stimulations: Hydraulic Fracturing and Matrix Acidizing Case Studies
- Jian Huang (Weatherford) | Reza Safari (Weatherford) | Francisco E. Fragachan (Weatherford)
- Document ID
- Society of Petroleum Engineers
- SPE International Hydraulic Fracturing Technology Conference and Exhibition, 16-18 October, Muscat, Oman
- Publication Date
- Document Type
- Conference Paper
- 2018. Society of Petroleum Engineers
- 4.3.4 Scale, 2.4 Hydraulic Fracturing, 5.8.7 Carbonate Reservoir, 2.2 Installation and Completion Operations, 5 Reservoir Desciption & Dynamics, 4 Facilities Design, Construction and Operation, 4.1 Processing Systems and Design, 2 Well completion, 4.1.2 Separation and Treating, 2.1.3 Completion Equipment, 5.8 Unconventional and Complex Reservoirs, 2.6 Acidizing, 1.10 Drilling Equipment, 3 Production and Well Operations, 1.10 Drilling Equipment
- Matrix Acidizing, Fluid Diversion, Particulate Diverter, Geomechanics, Hydraulic Fracturing
- 9 in the last 30 days
- 224 since 2007
- Show more detail
- View rights & permissions
|SPE Member Price:||USD 9.50|
|SPE Non-Member Price:||USD 28.00|
Particulate diversions are widely used for stimulation treatments. Usual field practice is to increase the volume of solid particles to create a considerable pressure response. However, an excessive dose of particles challenges particle removal and results in unexpectedly longer clean-up time. Self-degradable particulate diverter systems can overcome this shortcoming. The current study investigates the mechanisms of self-degradable particle transport and progressive clogging involved in fluid diversion. Engineering solutions and case studies for applying this new diversion technology in fracturing unconventional formations and acidizing carbonate reservoirs are discussed separately.
An integrated workflow and numerical models have been established and verified with experimental data and field experience. In the hydraulic fracture stimulation analysis, a wellbore-scale computational fluid dynamics and discrete element method (CFD-DEM) is employed to understand the physics of particle slurry transport and particle jamming at an opening. A three-dimensional reservoir-scale simulator is used and coupled with particulate diversion mechanisms for fracturing. To simulate the carbonate-acidizing procedure, an in-house numerical engine was developed and used to design the diversion of acidic fluid. The stimulated reservoir extent and associated production are predicted to compare the fluid diversion efficiency between various designs and to show the robustness and effectiveness of engineered particle designs. Two field data sets are utilized to demonstrate the applications of new particulate diverters in hydraulic fracturing and matrix acidizing respectively.
Analysis suggests that the success of the new diverter system application is governed by the particle characteristics (size, shape, ratio and concentration) and diverter slurry displacement (rate, viscosity and volume of displacing fluid). The models and workflows are capable of designing fit-for-purpose diverters and their application in different stimulations, including both hydraulic fracturing and matrix acidizing. As demonstrated in our studies, non-engineered designs could result in low fluid-diversion efficiency or even failure of reservoir stimulations. Engineered self-degradable particulate diverters can plug the openings (including perforations and induced wormholes) and withstand differential pressure to divert stimulation fluid (either fracturing slurry or acidic fluid) into under-stimulated regions for effective fracturing and acidizing.
According to our case studies, particulate diverters can be designed to enhance fluid diversion efficiency and optimize the use of particles. The case studies demonstrate the practical applicability and advantages of using self-degradable particulate diverters in both hydraulic fracturing and matrix acidizing operations. The integrated workflow and analysis proved useful to guide the field executions for successful fluid diversions.
|File Size||2 MB||Number of Pages||23|
Barraza, J., Capderou, C., Jones, M.C., Lannen, C.T., Singh, A.K., Shahri, M.P., Babey, A.G., Koop, C.D., and Rahuma, A.M. 2017. Increased Cluster Efficiency and Fracture Network Complexity Using Degradable Diverter Particulates to Increase Production: Permian Basin Wolfcamp Shale Case Study. Paper presented at the SPE Annual Technical Conference and Exhibition, 9-11 October, San Antonio, Texas, USA.
Fragachan, F.E., Shahri, M.P., Arnold, D.M., Babey, A.G., and Smith, C.S. 2016. Enhancing Well Performance Via in-Stage Diversion in Unconventional Wells: Physics and Case Studies. Paper presented at the SPE Argentina Exploration and Production of Unconventional Resources Symposium, 1-3 June, Buenos Aires, Argentina.
Gonzalez, D., Ulloa, J., Safari, R., Al-Rawi, A., and Babey, A. 2017. State of the Art Biodegradable Diversion Technology Applied on Tight Carbonates Reservoir Leads to Maximized Production. Paper presented at the SPE Abu Dhabi International Petroleum Exhibition & Conference, 13-16 November, Abu Dhabi, UAE.
Hryb, D.E., Archimio, A., Badessich, M., Ejofodomi, E.A., Diaz, A., Cavazzoli, G.D., Fernando, Z.A., Lagarrigue, E.A., and Pichon, S. 2014. Unlocking the True Potential of the Vaca Muerta Shale Via an Integrated Completion Optimization Approach. Paper presented at the SPE Annual Technical Conference and Exhibition, 27-29 October, Amsterdam, The Netherlands.
Lecampion, B., Desroches, J., Weng, X., Burghardt, J., and Brown, J.E. 2015. Can We Engineer Better Multistage Horizontal Completions? Evidence of the Importance of near-Wellbore Fracture Geometry from Theory, Lab and Field Experiments. Paper presented at the SPE Hydraulic Fracturing Technology Conference 3-5 February, The Woodlands, Texas, USA.
Safari, R., Smith, C., and Fragachan, F. 2017b. Improved Recovery of Carbonate Reservoir by Optimizing Acidizing Strategy; Coupled Wellbore, Reservoir, and Geomechanical Analysis. Paper presented at the Abu Dhabi International Petroleum Exhibition & Conference, 13-16 November, Abu Dhabi, UAE. Society of Petroleum Engineers.
Shahri, M.P., Huang, J., Smith, C.S., and Fragachan, F.E. 2017a. Solid-Particulate Diverter Optimization: Coupling Perforation-Scale Particle Transport to Field-Scale Fracturing Simulation. Paper presented at the 51st US Rock Mechanics / Geomechanics Symposium, 25-28 June, San Francisco, California, USA.