A Coupled CFD-DEM Numerical Study of Lost Circulation Material Transport in Actual Rock Fracture Flow Space
- Y. Feng (Southwest Petroleum University) | G. Li (Southwest Petroleum University) | Y. Meng (Southwest Petroleum University)
- Document ID
- Society of Petroleum Engineers
- IADC/SPE Asia Pacific Drilling Technology Conference and Exhibition, 27-29 August, Bangkok, Thailand
- Publication Date
- Document Type
- Conference Paper
- 2018. IADC/SPE Asia Pacific Drilling Technology Conference
- 5.5 Reservoir Simulation, 5 Reservoir Desciption & Dynamics, 1.11 Drilling Fluids and Materials, 1.6 Drilling Operations, 1.8 Formation Damage
- lost circulation material, CFD-DEM, fracture sealing, loss control, fracture scanning
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- 156 since 2007
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Fractures are beneficial to the cost-effective development of unconventional reservoirs, which may also induce drilling fluid loss, formation damage and other issues. Fracture plugging is the most common measures to settle those problems. The effect of fracture plugging largely depends on the lost circulation material (LCM) formula. In order to form the plugging zone rapidly in the near wellbore portion of fracture, it is necessary to study the transport process of LCM in real fracture. In this paper, the distributions of fracture aperture of a tight sandstone specimen are captured utilizing the high-resolution and high-precision structured light scanning systems, which is used to reconstruct the geometric model of actual rock fracture flow space. The coupled Computational Fluid Dynamics and Discrete Element Method (CFD-DEM) simulation is carried out to study the interaction between drilling fluid and LCM particles as well as LCM transport in above geometric model with various particle size. The constant directional torque (CDT) model is employed in the part of DEM computation to account the influence of LCM particle shape. The numerical simulation results show the LCM particles would plug in the narrow region of the actual rock fracture flow space, inducing the rapid accumulation of other LCM particles. The compatibility between the distributions of fracture aperture and the size of LCM particles played a decisive role in the transport process of the LCM particles, which directly determined the position of plugging zone. The multigrain bridging phenomenon of small size LCM particles was observed in simulations. This paper presents the idea of combining the reconstruction technique of actual rock fracture flow space and the CFD-DEM simulation to mimic the transport process of LCM particles in real rock fracture. The simulation results show the fracture surface topography has a significant influence on LCM particles transport and plugging zone distribution; the LCM particles considering the nonsphericity may multigrain bridge in the fracture which will greatly improve the efficiency of fracture plugging.
|File Size||1 MB||Number of Pages||16|
GROWCOCK F. How to stabilize and strengthen the wellbore during drilling operation. Retrieved May 1, 2018 from http://www.spe.org/dl/docs/2010/FredGrowcock.pdf.
Alberty, M. W., & McLean, M. R. (2004, January 1). A Physical Model for Stress Cages. Society of Petroleum Engineers. doi: 10.2118/90493-MS
Dupriest, F. E. (2005, January 1). Fracture Closure Stress (FCS) and Lost Returns Practices. Society of Petroleum Engineers. doi: 10.2118/92192-MS
Van Oort, E., Friedheim, J. E., Pierce, T., & Lee, J. (2011, December 1). Avoiding Losses in Depleted and Weak Zones by Constantly Strengthening Wellbores. Society of Petroleum Engineers. doi: 10.2118/125093-PA
Feng, Y., Jones, J. F., & Gray, K. E. (2016, May 1). A Review on Fracture-Initiation and -Propagation Pressures for Lost Circulation and Wellbore Strengthening. Society of Petroleum Engineers. doi: 10.2118/181747-PA
Salehi, S., Hussmann, S., Karimi, M., Ezeakacha, C. P., & Tavanaei, A. (2014, September 10). Profiling Drilling Fluid’s Invasion Using Scanning Electron Microscopy: Implications for Bridging and Wellbore Strengthening Effects. Society of Petroleum Engineers. doi: 10.2118/170315-MS
Mollanouri Shamsi, M.., Farhadi Nia, S., & Jessen, K. (2015, April 27). Conductivity of Proppant-Packs under Variable Stress Conditions: An Integrated 3D Discrete Element and Lattice Boltzman Method Approach. Society of Petroleum Engineers. doi: 10.2118/174046-MS
Blyton, C. A. J., Gala, D. P., & Sharma, M. M. (2015, September 28). A Comprehensive Study of Proppant Transport in a Hydraulic Fracture. Society of Petroleum Engineers. doi: 10.2118/174973-MS
Khan, H. J., Mirabolghasemi, M. S., Yang, H., Prodanovic, M., DiCarlo, D. A., & Balhoff, M. T. (2017). Study of formation damage caused by retention of bi-dispersed particles using combined pore-scale simulations and particle flooding experiments. Journal of Petroleum Science and Engineering, 158, 293-308.
Basu, D., Das, K., Smart, K., & Ofoegbu, G. (2015, November). Comparison of Eulerian-Granular and discrete element models for simulation of proppant flows in fractured reservoirs. In ASME 2015 International Mechanical Engineering Congress and Exposition (pp. V07BT09A012-V07BT09A012). American Society of Mechanical Engineers.
Zhang, F., Zhu, H., Zhou, H., Guo, J., & Huang, B. (2017, April 1). Discrete-Element-Method/Computational-Fluid-Dynamics Coupling Simulation of Proppant Embedment and Fracture Conductivity After Hydraulic Fracturing. Society of Petroleum Engineers. doi: 10.2118/185172-PA